Isolation Transmitters

diamondelec.co.uk

Isolation Transmitters

Isolation Transmitters

2 Passive signal amplifier

3 Passive loop power supply isolation amplifier

4 Active D series of high precision isolation amplifier

5 Millivolt-class signal amplifier

6 Positive and negative signal amplifier

7 Millivolt-class positive and negative signal amplifier

8 Application notes

T: 01477 505 200 F: 01477 500 656


E: sales@diamondelec.co.uk W: www.diamondelec.co.uk


IGBT Drive Special Power

Isolation Amplifier Module

QA01, QA02, QA03, QA04

Specially Designed For IGBT Driver

DC-DC Converter

QA01,QA02,QA03 ,QA04 are specially designed for the

IGBT driver which needs two isolation power supply. With

two independent outputs, it can be better to supply power

to the ON/OFF driver. The module also provides functions

of short circuit protection and self-recovery capability.

FEATURES

Input voltage range:As table

Miniature size, Light weight

3000VAC isolation(input,output;Tested for 1min/1mA)

Short circuit protection

SPECIFICATIONS

Operating temperature.....................-40℃~+85℃(QA01,QA02,QA03)

Efficiency.........................................80%

-40℃~+105℃(QA04)

Input voltage range...................................QA01: 14.5~15.5VDC

QA02: 11.6~12.4VDC

QA03: 23.3~24.7VDC

QA04: 9~15VDC

Line regulation(Vin change of 1%).....1.5%(max)(QA01,QA02,QA03)

Size: 19.5x9.8x12.5(mm)

3.20

(0.126)

VIN

12.5

(0.492)

(0.161)

6

(0.079)

19.5(0.768)

C1 +

0.50

(0.020)

(0.100) (0.020)

Note:First angle projection

TEST EXAMPLE

Q A W X C X X D - X X

100μF/35V

1

(0.386)

QA0x

Special output label

Package marking

Product serial number

Number of output groups

Representative voltage input type

Dedicated power supply for IGBT Driver

RECOMMENDED FOOTPRINT

Top View,grid: 2.54mm(0. 1inch)

1.00 [0.039]

Pin Function

1

2

5

6

7

7

C2 +

100μF/35V

6

V

A

6

Vin

GND

-Vo

0V(com)

+Vo

Load

Passive Signal Amplifier

T1100 series, a standard analog amplifier, with 4-20mA current signal input

and 4-20mA current signal output, is a passive signal isolation module.

Adopting unique electromagnetism isolation design and high efficiency loop

electric-larceny technology, independent power supply isn’t required for the

module, realizing 4-20mA standard signal isolation with high accuracy and

linearity. Besides, the modules have extremely low temperature drift (no

more than 35ppm/℃under -25 ℃ ~ +71 ℃ ). The isolation voltage between the

input and output can be up to 3KVDC.

T1100N/NS PACKAGE INFORMATION AND PIN ASSIGNMENT

T1100RN/N

2.54

[0.100]

1.50

(0.059)

23.80[0.937]

17.78

[0.700]

0.50

[0.020]

(DIP Package)

8.00[0.315]

0.50

[0.020]

13.70[0.539]

Note:First angle projection

1 2 9 101112

32.00(1.260)

0.80

[0.031]

T1100RNS/NS

7.90

(0.311)

23.80[0.937]

17.78

[0.700]

(SMD Package)

8.00[0.315]

0.50

[0.020]

18.60

[0.737]

PIN

1(Sout-)

2(Sout+)

7(Sin+)

8(Sin-)

Others

T1100L PACKAGE INFORMATION AND PIN ASSIGNMENT

Signal

output

1 2 9 101112

NC

NC

NC

2.54

NC

NC

2( Iin-)

Sout-

Sout+

NC

Sin+

Sin-

Signal

input

2.54

NC: No Connection, otherwise the

module will be damaged.

Unit: mm

Tolerance: 0.0±0.25,0.00±0.25

PIN

1( Iin+ )

FUNCTION

Signal Output-

Signal Output+

Signal Input+

Signal Input-

NC

FUNCTION

Signal Input+

Signal Input-

T x x x x N

FEATURES

High precision(0.1% F.S.)

High linearity(0.1% F.S.)

Isolation voltage 3KVDC/60S

Low voltage drop-out(@ 20mA500,000 hours)

Isolation IGBT Driver Amplifier

Assistant Module Power

(Vin change of 25%)...1.5%(max)(QA04)

Isolation capacitor............................6.6pF(typ)(QA01,QA02,QA03)

10pF(typ)(QA04)

Ripple & Noise(I01=80mA)...............150mVp-p(max)(QA01)

(I01=80mA)...............200mVp-p(max)(QA02)

(I01=80mA)...............300mVp-p(max)(QA03)

(I01=100mA).............200mVp-p(max)(QA04)

Short circuit protection......................Continuous short-circuit protection for 10 minutes, self-restart

Storage temperature........................-50℃~+125℃

MTBF..............................................≥3,500,000 hours

Certificate.......................................RoHS

Series

Input

(VDC)

Positive

output(VDC)

Negative

output(VDC)

Input Range

VIN

VIN

C1 +

100μF/35V

+

100μF/35V

2

The test of positive voltage output

APPLICATION EXAMPLE

Max. Output

average current

1

2

1

2

QA0x

7

6

5

5

7

6

C2 +

100μF/35V

The test of negative voltage output

QA0x

5

Control signal

QA01 15

+15 -8.7 ±3% 80mA/40mA 80% 3000 SIP

QA01-17 15

+17 -8.7 ±3% 80mA/40mA 80% 3000 SIP

QA02 12

+15 -9

±3% 80mA/40mA

80% 3000 SIP

QA03 24

+15

-9

±3% 80mA/40mA

80% 3000 SIP

QA04 12

+15 -8 ±25% 100mA/80mA 80% 3000 SIP

100μF/35V

100μF/35V

Efficiency

+

+

V

A

IGBT

DRIVER

Isolation

(VAC)

Load

Package

14.50

(0.571)

0.50

(0.020)

ELECTRICAL CHARACTERISTICS

Input

Parameter

Output

Parameter

(SIP12 Package)

Note:First angle projection

4.1(0.161)

Input Signal............4~20mA

Overload ...............≤50mA

Voltage Drop-out....Typ: 3V(@ input = 20mA)

Output Signal........ ...4~20mA

Load Regulation......< 0.05% meas.val./100Ω

PRODUCT USING CONNECTION

Sensor

4~20mA

+

1

2

12

11

10

9

4~20mA

PRODUCT PROGRAM

Part

Power

Number

Supply

T1100N/NS

None

T1100RN/RNS None

T1100L

None

+

+

-

-

T1100L using connection

-

RL

9,10(Iout-)

11,12(Iout+)

Signal Output-

Signal Output+

Unit:mm

Tolerance:0.0±0.25,0.00±0.25

TRANSMISSION CHARACTERISTICS

Zero Offset.................... 0.1%F.S.

Gain Error...................... 0.1%F.S.

Temperature Drift............0.0035%F.S./℃(-25℃~+71℃)

ISOLATION CHARACTERISTICS

Galvanic lsolation...............Two-port isolation(Between input and output)

Isolation Voltage.............3KVDC (Tested for 1minute,leakage current


Vin-

Isolation Amplifier Module

Isolation Amplifier Module

Isolation Amplifier

Module

Passive Loop Power Supply

Isolation Amplifier

T1100L-F Isolation transmitter is a kind of two-wire loop powered isolation

module.A isolation power is transmitted from the 4 ~20mA current loop to

power the former two-wire transmitter and receive the 4~20mA current

signal from the two-wire transmitter.Adopting unique electromagnetism

isolation design and high efficiency loop electric-larceny technology

independent power supply is not required for the module, realizing

4~20mA standard signal isolation with high accuracy it match to kinds of

equipment module input attachment (PLC/DCS act); Overcurrent

Protection is designed to protect the isolation module and the latter circuit;

Besides, the module have extremely low temperature drift(no more than

35PPM/ ℃ under -25 ℃ ~+71 ℃ ).The isolation voltage between the input

and output can be up to 3KVDC.

T1100L-F PACKAGE INFORMATION AND PIN ASSIGNMENT

1.50

(0.059)

14.50

(0.571)

0.50

(0.020)

1 2 9 101112

ELECTRICAL CHARACTERISTICS

Input

Parameter

Output

Parameter

32.00(1.260)

(SIP12 Package)

Note:First angle projection

Two-wire

System Transmitter

4~20mA

7.90

(0.311)

4.1(0.161)

2.54(0.100)

1 2 9101112

Input Signal...........4~20mA

Overload ..............≤30mA(Over-current protection)

Voltage Drop-out...Typ: 5V(@ input = 20mA)

Output Signal..........4~20mA

2.54(0.100)

1.00(0.039)

Load Capacity.........RL≤(Us–5)/0.02

PRODUCT USING CONNECTION

PRODUCT PROGRAM

+

+

-

-

12

11 Input

10

9

Output

300VDC Electrical Isolation

PIN

1( Iin+ )

2( Io)

9,10(Iin)

11,12(Vout)

Us:loop power supply voltage

1

2

(10~

30VDC)

+

4~20mA

+

- -

DCS or PLC

+ -

10~30VDC

RL

FUNCTION

Power input

current output

current input

Power output

Unit:mm(inch)

Pin tolerances:±0.10mm(± 0.004inch)

General tolerances:±0.5mm(±0.020inch)

T11 0 0 L-F

FEATURES

Loop power supply Over-current Protection

Isolation voltage(3KVDC/60s)

Extremely low temperature drift(35ppm/℃)

Industry standard(Operating temperature:

-25℃ ~ 71℃)

High reliability(MTBF>500,000 hours)

TRANSMISSION CHARACTERISTICS

Zero Offset.................... 0.4%F.S.

Gain Error...................... 0.4%F.S.

Temperature Drift............0.0035%F.S./℃(-25℃~+71℃)

Loop power supply

Package style

Isolation power output

Power supply

Signal output

Signal input

Isolation amplifier

ISOLATION CHARACTERISTICS

Galvanic lsolation...............Two-port isolation(Between input and output)

Isolation Voltage.............3KVDC (Tested for 1minute,leakage current

500,000 hours)

Temperature Drift.........0.0035%F.S./℃ (-25℃ ~ +71℃)

ISOLATION CHARACTERISTICS

Galvanic Isolation.......Four-port isolation (Between input, output,

power supply and isolation power output)

Isolation Voltage..........2.5KVDC (Tested for 1minute and leakage current


Vin-

Isolation Amplifier Module

Isolation Amplifier Module

Isolation Amplifier

Module

Passive Loop Power Supply

Isolation Amplifier

T1100L-F Isolation transmitter is a kind of two-wire loop powered isolation

module.A isolation power is transmitted from the 4 ~20mA current loop to

power the former two-wire transmitter and receive the 4~20mA current

signal from the two-wire transmitter.Adopting unique electromagnetism

isolation design and high efficiency loop electric-larceny technology

independent power supply is not required for the module, realizing

4~20mA standard signal isolation with high accuracy it match to kinds of

equipment module input attachment (PLC/DCS act); Overcurrent

Protection is designed to protect the isolation module and the latter circuit;

Besides, the module have extremely low temperature drift(no more than

35PPM/ ℃ under -25 ℃ ~+71 ℃ ).The isolation voltage between the input

and output can be up to 3KVDC.

T1100L-F PACKAGE INFORMATION AND PIN ASSIGNMENT

1.50

(0.059)

14.50

(0.571)

0.50

(0.020)

1 2 9 101112

ELECTRICAL CHARACTERISTICS

Input

Parameter

Output

Parameter

32.00(1.260)

(SIP12 Package)

Note:First angle projection

Two-wire

System Transmitter

4~20mA

7.90

(0.311)

4.1(0.161)

2.54(0.100)

1 2 9101112

Input Signal...........4~20mA

Overload ..............≤30mA(Over-current protection)

Voltage Drop-out...Typ: 5V(@ input = 20mA)

Output Signal..........4~20mA

2.54(0.100)

1.00(0.039)

Load Capacity.........RL≤(Us–5)/0.02

PRODUCT USING CONNECTION

PRODUCT PROGRAM

+

+

-

-

12

11 Input

10

9

Output

300VDC Electrical Isolation

PIN

1( Iin+ )

2( Io)

9,10(Iin)

11,12(Vout)

Us:loop power supply voltage

1

2

(10~

30VDC)

+

4~20mA

+

- -

DCS or PLC

+ -

10~30VDC

RL

FUNCTION

Power input

current output

current input

Power output

Unit:mm(inch)

Pin tolerances:±0.10mm(± 0.004inch)

General tolerances:±0.5mm(±0.020inch)

T11 0 0 L-F

FEATURES

Loop power supply Over-current Protection

Isolation voltage(3KVDC/60s)

Extremely low temperature drift(35ppm/℃)

Industry standard(Operating temperature:

-25℃ ~ 71℃)

High reliability(MTBF>500,000 hours)

TRANSMISSION CHARACTERISTICS

Zero Offset.................... 0.4%F.S.

Gain Error...................... 0.4%F.S.

Temperature Drift............0.0035%F.S./℃(-25℃~+71℃)

Loop power supply

Package style

Isolation power output

Power supply

Signal output

Signal input

Isolation amplifier

ISOLATION CHARACTERISTICS

Galvanic lsolation...............Two-port isolation(Between input and output)

Isolation Voltage.............3KVDC (Tested for 1minute,leakage current

500,000 hours)

Temperature Drift.........0.0035%F.S./℃ (-25℃ ~ +71℃)

ISOLATION CHARACTERISTICS

Galvanic Isolation.......Four-port isolation (Between input, output,

power supply and isolation power output)

Isolation Voltage..........2.5KVDC (Tested for 1minute and leakage current


Isolation Amplifier Module

Isolation Amplifier Module

Isolation Amplifier

Module

Millivolt-class Signal Amplifier

MV-level isolation amplifier can receive the mV-voltage signal input from the

field, and transmit a standard output signal to the control room or DCS after

isolated. With characteristics of high output accuracy, good linearity and low

temperature drift, it needs an independent power supply. These modules have

three-port isolation(input, output and power supply), and the isolation voltage

between them is up to 2.5KVDC.

PACKAGE INFORMATION AND PIN ASSIGNMENT

20.30 [0.800]

4.10 [0.161]

15.24 [0.600]

ELECTRICAL CHARACTERISTICS

Power

Supply

Parameter

Input

Parameter

Output

Parameter

31.80 [1.252]

1 3 11 12

24 23

16 15

2.54 [0.100]

27.94 [1.100]

0.50 [0.020]

Note:First angle projection

14 13

9.50

[0.374]

15.24 [0.600]

2.54 [0.100]

24 23

16 15 14

1 2 3 11

2.54 [0.100]

Power Supply............(24VDC/15VDC/12VDC)±5%

Power Consumption....≤2W

Power Protection......Reverse protection

Input Signal.............10/20/30/50/75/100mV

Input Impedance......≥10MΩ

Overload.................≤5V

Output Signal.......... 0~5V; 0~10V

Load capacity............ ≥2KΩ(@ 10V output)

PRODUCT PROGRAM

Part Number

TM4530P

TM4630P

TM5530P

TM5630P

TM6530P

TM6630P

?1.00 [0.039]

13

12

27.94 [1.100] 1.93 [0.176]

Power Supply

24V

24V

24V

24V

24V

24V

Pin

1(Sout-)

3(Sout+)

11(Sin+)

12(Sin-)

23(Pin+)

24(Pin-)

Others

Function

Signal Output-

Signal Output+

Signal Input+

Signal Input-

Power supply+

Power supply-

NC

NC: No connection, otherwise the module

will be damaged.

Unit: mm

General tolerances: ± 0.25

Note: We could also offer customer design for special input and output.

TM x x x 0 P

FEATURES

High precision(0.1% F.S.)

High linearity(0.1% F.S.)

TRANSMISSION CHARACTERISTICS

Isolation voltage(2.5KVDC/60S)

Low temperature drift(35ppm/℃)

Industry standard(Operating Temperature

Range: -25℃ ~ 71℃)

High reliability(MTBF>500,000 hours)

Zero Offset..................0.1%F.S.

Gain Error....................0.1%F.S.

Temperature Drift...........0.0035%F.S./℃(-25℃~+71℃)

Package style

No distribution

Power Supply

Signal output

Signal intput

mV Signal input

Isolation Amplifier

ISOLATION CHARACTERISTICS

Galvanic Isolation........Three port Isolation(input, output, power supply)

Isolation Voltage..............2.5KVDC(Tested for 1minute ,leakage current 500,000 hours)

ISOLATION CHARACTERISTICS

Galvanic Isolation.......Four-port isolation

(input, output, power supply and Isolation power output)

Isolation Voltage............2.5KVDC (Tested for 1minute and leakage current


Isolation Amplifier Module

Isolation Amplifier Module

Isolation Amplifier

Module

Millivolt-class Signal Amplifier

MV-level isolation amplifier can receive the mV-voltage signal input from the

field, and transmit a standard output signal to the control room or DCS after

isolated. With characteristics of high output accuracy, good linearity and low

temperature drift, it needs an independent power supply. These modules have

three-port isolation(input, output and power supply), and the isolation voltage

between them is up to 2.5KVDC.

PACKAGE INFORMATION AND PIN ASSIGNMENT

20.30 [0.800]

4.10 [0.161]

15.24 [0.600]

ELECTRICAL CHARACTERISTICS

Power

Supply

Parameter

Input

Parameter

Output

Parameter

31.80 [1.252]

1 3 11 12

24 23

16 15

2.54 [0.100]

27.94 [1.100]

0.50 [0.020]

Note:First angle projection

14 13

9.50

[0.374]

15.24 [0.600]

2.54 [0.100]

24 23

16 15 14

1 2 3 11

2.54 [0.100]

Power Supply............(24VDC/15VDC/12VDC)±5%

Power Consumption....≤2W

Power Protection......Reverse protection

Input Signal.............10/20/30/50/75/100mV

Input Impedance......≥10MΩ

Overload.................≤5V

Output Signal.......... 0~5V; 0~10V

Load capacity............ ≥2KΩ(@ 10V output)

PRODUCT PROGRAM

Part Number

TM4530P

TM4630P

TM5530P

TM5630P

TM6530P

TM6630P

?1.00 [0.039]

13

12

27.94 [1.100] 1.93 [0.176]

Power Supply

24V

24V

24V

24V

24V

24V

Pin

1(Sout-)

3(Sout+)

11(Sin+)

12(Sin-)

23(Pin+)

24(Pin-)

Others

Function

Signal Output-

Signal Output+

Signal Input+

Signal Input-

Power supply+

Power supply-

NC

NC: No connection, otherwise the module

will be damaged.

Unit: mm

General tolerances: ± 0.25

Note: We could also offer customer design for special input and output.

TM x x x 0 P

FEATURES

High precision(0.1% F.S.)

High linearity(0.1% F.S.)

TRANSMISSION CHARACTERISTICS

Isolation voltage(2.5KVDC/60S)

Low temperature drift(35ppm/℃)

Industry standard(Operating Temperature

Range: -25℃ ~ 71℃)

High reliability(MTBF>500,000 hours)

Zero Offset..................0.1%F.S.

Gain Error....................0.1%F.S.

Temperature Drift...........0.0035%F.S./℃(-25℃~+71℃)

Package style

No distribution

Power Supply

Signal output

Signal intput

mV Signal input

Isolation Amplifier

ISOLATION CHARACTERISTICS

Galvanic Isolation........Three port Isolation(input, output, power supply)

Isolation Voltage..............2.5KVDC(Tested for 1minute ,leakage current 500,000 hours)

ISOLATION CHARACTERISTICS

Galvanic Isolation.......Four-port isolation

(input, output, power supply and Isolation power output)

Isolation Voltage............2.5KVDC (Tested for 1minute and leakage current


Isolation Amplifier Module

Power Supply Testing

Isolation Amplifier

Module

Millivolt-class Positive and Negative

Signal Amplifier

The TM_CP series isolation amplifier modules have a millivolt-class positive and

negative signal input and positive and negative signal output. These modules, with

a high efficiency micro-power source built-in, can provide power for signal

processing circuit. In the three-wire and four-wire transmitter applications, our

products make customers’ design simple and helpfully improve the room-using

ratio of PCB. Adopting electromagnetism isolation technology, it is available to keep

higher accuracy and extremely lower temperature drift than photocoupler isolation.

These modules have three-port isolation(input, output and power supply),and the

isolation voltage between them is up to 2.5KVDC.

PACKAGE INFORMATION AND PIN ASSIGNMENT

20.30 [0.800]

4.10 [0.161]

15.24 [0.600]

ELECTRICAL CHARACTERISTICS

Power

Supply

Parameter

Input

Parameter

Output

Parameter

31.80 [1.252]

1 3 11 12

24 23

16 15

2.54 [0.100]

27.94 [1.100]

0.50 [0.020]

Note:First angle projection

14 13

9.50

[0.374]

Power Supply..........(24VDC/15VDC/12VDC)±5%

Power Consumption...≤1W

Power Protection....Reverse protection

Input Signal.......... ±10/±20/±30/±50/±75/±100mV

Input Impedance....≥10MΩ(@ max input signal)

Overload...............≤5V

Output Signal.......... ± 5V/ ± 10V

Load Capacity..........≥2K Ω(@ ±10V output)

PRODUCT PROGRAM

15.24 [0.600]

2.54 [0.100]

Part Number

TM4530CP

TM4630CP

TM5530CP

TM5630CP

TM6530CP

TM6630CP

24 23

16 15 14

1 2 3 11

2.54 [0.100]

27.94 [1.100] 1.93 [0.176]

Power Supply

24V

24V

24V

24V

24V

24V

?1.00 [0.039]

Note: We could also offer customer design for special input and output.

13

12

Pin

1(Sout-)

3(Sout+)

11(Sin+)

12(Sin-)

23(Pin+)

24(Pin-)

Others

Function

Signal output(-)

Signal output(+)

Signal input(+)

Signal input(-)

Power supply(+)

Power supply(-)

NC

NC: No connection, otherwise the module

will be damaged.

Unit: mm

General tolerances: ± 0.25

FEATURES

High precision(0.1% F.S.)

High linearity(0.1% F.S.)

TRANSMISSION CHARACTERISTICS

Isolation voltage(2.5KVDC/60S)

Low temperature drift(35ppm/℃)

Industry standard(Operating temperature

range: -25℃ ~ 71℃)

High reliability(MTBF>500,000 hours)

Zero Offset.. ..............

0.1%F.S.

Gain Error..................0.1%F.S.

Temperature Drift.........≥50mV: 0.0035%F.S./ ℃

< 50mV: 0.0050%F.S./℃(-25℃~+71℃)

ISOLATION CHARACTERISTICS

Galvanic Isolation.......Three-port isolation (Input, output and power supply )

Isolation Voltage............2.5KVDC(Tested for 1minute ,leakage current


DC-DC Converter Application Notes

Isolation Amplifier Module Application Notes

9.Capacitive load

To meet the requirements of capacitive loads, it is recommended

for wide input series, the recommended capacitor is 100uF.

10.Output low load and overload protection

1) Low load prevention circuit

Most isolated DC/DC converters have some minimum load required

to guarantee proper operation and regulation. Typically, this

is 10% (non-isolated series can stand continuous unload). The

output voltage will increase above stated spec for unregulated,

For example, when converter is supplying power to a relay,

MOSFET or IC of low power consumption(such as 485), it is

recommended to guarantee a 10% load under worst case conditions.

As the figure shows:

2) Overload prevention circuit

Though some current can be limited by a filter, when overload

and/or short circuit conditions occur, a high current can cause

damage to DC/DC converters. It is recommended that one installs

a slow blow type fuse of rating 3 times max input current on the

input as shown. Contact factory for details.

As the figure shows Simple overload protection

(1) Sometimes a circuit breaker can be used.

(2) Sometimes we also can avoid overload by limiting the input current

as the above figure shows:

A: Utilize a pre-regulator to limit the input current, but the overall efficiency

will be reduced.

B: A series resistor network may be placed before the converter to limit

current, but in all but a few cases, this is usually impractical.

C: To limit input current by setting RGND, 0.7V=RGND*ILIMIT with an

op amp circuit.

(3)

A: An opto-isolator can be used to limit PWM duty cycle.

B: A thermistor can be used to measure the current and provide

feedback to the PWM.

11. Special function pin explanation

1) Output voltage trimming range

Through adding a resistor at the TRIM terminal, the user can

adjust the output voltage ±10% around its rated value. The

total output power of the converter should be limited to its

maximum specified output power.

Figure 1 shows how to connect the external trim resistors.

If only to adjust to higher (or lower) voltage, the resistor could

be connected only between TRIM terminal and negative output

(or positive output). The general rules are, to increase output

voltage, adding resistor between TRIM terminal and negative

output is all that is needed; to decrease output voltage, then

adding resistor between TRIM terminal and positive output is

all that is needed. If TRIM is not needed, just leave it open circuit.

Figure 1: How to connect resistors for trimming

2) Remote on/off control

Remote ON/OFF control refers to the turning on or off the

converter by external means. Remote on/off control pin is usually

called CTL terminal, CNT terminal or REM terminal. There're two

standard remote control models.

Positive Logic:

CTL terminal connected directly to -VIN, output OFF; CTL terminal

open or connected to up level (TTL High) output ON.

Negative Logic:

CTL terminal connected directly to -VIN, output ON; CTL terminal

open, output OFF.

Input

Control signal

Figure 2: isolated control method

LOAD

Figure 3: general control method

In some special applications, isolated control method is required,

see figure 2 for the reference circuit.

Input

Control signal

1.Functions

Isolation amplifier module can change the DC voltage, current signal to

different isolated DC voltage or current signal at linear proportional.

1.1:

On most occasions of MCU applications, transmitters are widely

used to translate the signals, which can’t be measured directly by

MCU, into electrical analog signal which can be processed by MCU

easily. There are current transmitter, press transmitter, temperature

transmitter, flow rate transmitter, etc. Typical application is as follows:

Transmitter:

Temperature

pressure

location

speed

flux

humidity

acousto-optic

identification

Display/Signal output

DC/DC

Isolation Amplifier

Power

Management

2.The typical applications

A/D

D/A

Processor

(eg.MCU)

Logic

Interface

1.2: In modern electric measurement and controlling, usually, we will

use low-voltage instrument to measure and control high-voltage,

heavy current and something like analog signals. If there is no isolation

between the digital signal and those analog signals, the high-voltage,

heavy current will easily merge into low-voltage instrument and cause

terrible damage and even safety accidents.schematic diagram is as below:

1000VDC

M

60mV

Isolation Amplifier

0V

Isolation of dangerous high voltages

A

Shunt

1000VDC

0V

60mV

M

I interfere V interfere

Avoiding interference caused by

differences in potential

MORNSUN Isolation amplifier module pins functions as follows

(Active voltage signal input models with one channel isolation

power output):

24 23 22 21 20 16 15 14 13

MORNSUN

TxxxxD

CNXXX

Isolation Amplifier

1 2 3 4 5 9 10 11 12

1 Sout-

2 Iout+

3 Vout+

4 NC

5 NC

9 NC

10 NC

11 Vi+

12 Vi-

24 Vp-

23 Vp+

22 NC

21 NC

20 NC

16 NC

15 NC

14 Viso+

13 Viso-

Remark:

This pins functions were in available to DIP24/SMD24 general

series, DIP16/SMD16 small size series is different from this. The

actual functions are subject to technical manual.

2.1 Power supply

Vp+, Vp- are the inputs pins of power supply, Vp+ is the positive

electrode, while Vp- is the negative, ±5% voltage precision, if the

voltage errors is too large, the Isolation amplifier module can work

normally, but can’t be assured long-term stability and normal

singnal drive capacity. Please pay attention to the polar of input

signal during connection; Very low supply voltage will not do any

damage to equipment, but the driving capacity is not well

guaranteed. The supply voltage should not exceed +15% of the

nominal value, or it will do damage to the instrument. We

recommend connecting a power protection circuit at the input end

to protect the module.

2.2 Isolation power output

Viso+ & Viso- is the output pin, Viso+ is the positive output of

micro isolation power output, Viso- is the negative. Our isolation

power output can offer 30mA output current, suitable to the power

supply of input sensor or front processing circuit. Isolation power

A

output can also be connected with current loop to meet the requirement

of two-wire translator. The output of this isolation power output is

non-regulated, if the front circuit requires regulation, then connect

an external LDO or three-port regulator. If the isolation power output

is not needed, then just keep it suspended. No need to connect external

capacitor if there is no highly requirement of isolation power output.

If want to reduce the ripple of isolation power output, the external

capacitance value should be within 4.7μF, or using regulator IC to

realize it. Besides, the specification of isolated output must match

the power specification of instruments to avoid the damage to the field

instruments.

2.3 Input signal

Vi+ is the positive electrode of input signal, Vi- is the negative

electrode of output signal.

a: Real input measurement range is the same as assigned value of

input & output signal measurement range.

The connection is showed as below, Sv is voltage signal source,

which can access the input signal end directly.

MORNSUN

TxxxxD

CNXXX

Isolation Amplifier

b: Real input measurement range is larger than the assigned signal value.

The solution is as below: Sv is voltage signal source, which can

access the input signal end by driver a sampling resistance, because

the input independence is very high, so the connection will not effect

the module’s input signal.

MORNSUN

TxxxxD

Vi=R1/(R1+R2)*Sv

CNXXX

Isolation Amplifier

C: Current signal input

The solution is as below: Si is current signal source, according to

ohm law, the current signal will be converted into voltage signal by

sampling resistance Ri, then can access the input end directly. The

input voltage measurement range can be got by choosing proper

sampling resistance value. It will not do any effect to the input signal

because of the module’s high input independence. The sampling

resistance will not be needed if it’s current signal input series which

can access the input end directly.

MORNSUN

TxxxxD

Vi=Ri*Sv

2.4 Output signal

Sout-,Iout+,Vout+ are signal output Pins. Sout- is the negative output

of signal, Iout+ is the positive output of constant current signal, Vout+ is

the positive output of voltage signal.

a: Current signal output

The solution is as below, the current output is from PIN Iout+.

Usually, Iout+ can offer a constant current signal and the load

capacity is less than 500Ω, that is if the load is less than 500Ω, the

correspondent output is only depend on the input signal, not the load.

This characteristic determines that current signal is suitable to long

distance transmission.Only connect a sampling resistance with

constant current loop at the remote terminal, the voltage of the

sampling resistance is linear proportional to input signal.

Ā +

Rs

MORNSUN

Vi

CNXXX

Isolation Amplifier

TxxxxD

Vi

Sv

- +

CNXXX

Isolation Amplifier

lo=4~20mA

Sv

- +

-

Si

+

R1

R2

Ri

67 68


Isolation Amplifier Module Application Notes

Map

b. Voltage signal output

The solution is as below, voltage signal is output from the Vout + pin

directly. For the maximum output voltage, load capacity is greater

than 1KΩ.

V - +

Rs

MORNSUN

TxxxxD

Vo

CNXXX

Isolation Amplifier

3. Extended applications

3.1 Protection of external port

The solution is as below, on some occasions which have strong

interference or high requirement on EMC, connecting a TVS can do

some help on protection. If there is an instantaneous high-voltage &

high-energy, TVS will clamp the voltage at once and form a loop to

protect the equipment. After disappearance of the high-voltage &

high-energy, TVS will go back to blocking state, and the equipment

will work again. Please pay more attention on the below principles

when choosing TVS.

a. The protection voltage of TVS should be at least double the max

operated voltage;

b. The power of TVS should be higher than instantaneous power

produced by the interference.

Power supply

-

A

+

-

A

+

Rli

Io=0~20mA

Rli

MORNSUN

TxxxxD

MORNSUN

TxxxxD

MORNSUN

CNXXX

Isolation Amplifier

Isolation power output

TxxxxD

CNXXX

Isolation Amplifier

3.2 Single input & dual outputs of voltage signal source

The solution is as below, parallel connection can get dual isolated

outputs signals. Multiple outputs can also be designed with the

above principle.

CNXXX

Isolation Amplifier

Isolation

power

output

Io=0~20mA

3.3 Single input & dual outputs current Signal

The solution as below is the typical application circuit, with standard

current signal (0~20mA) input and dual voltage & current outputs.

The principle is transforming the current signal into voltage signal by

sampling resistance Ri, then paralleling the inputs & power supply.

Multiple signal outputs application can also available in the same

way. The sampling resistance Ri will not be needed and the signal

can be accessed directly if using the current signal input series.

-

Sv

+

3.4 Single input & dual outputs two-wire transmitter signal source

The solution is as below, 1 unit power supply offer the power for twowire

translator and form a loop. Sampling resistance is connected to

get sampling voltage, by sharing the power supply and sampling

voltage, single input & dual outputs of two-wire transmitter signal

source can be achieved. So does with one single input & multiple

outputs.

Power supply

-

A

+

-

A

+

4. Connection of two-wire, three-wire & four-wire

device application

2-wire device typical application( T1133D)

Isolation power output

Power

Supply

Sensor

or

field

devices

3-wire device typical application( T1133D)

Rli

Io=0~20mA

Rli

Io=0~20mA

MORNSUN

14

13

12

+

-

Iin-

Iout-

Signal

Iout+ 2

11 Iin+

S:Input positive pole

TxxxxD

MORNSUN

-

+

CNXXX

Isolation Amplifier

Isolation power output

TxxxxD

CNXXX

Isolation Amplifier

1

23

24

Power supply

-

+

DCS

PLC

Display

devices

Rl≤500Ω

G:Output negative pole

Isolation power output

3.5 Dual inputs & single output (adder/ subtracter)

The solution is as below, those 2 units share power supply and

input signal source, and connect a diode at the signal output to

prevent a loop between these two units. The load RLi is shared by

the 2 units, so the current of RLi is the summation of those 2 units,

which is called adder. If reverse the polar of one unit output

current, then the current of RLi is the difference of those 2 units,

which called subtracter. So does with the multiple inputs and

single output circuit.

Power supply

-

A

+

Rli

Io=0~20mA

Io=0~20mA

MORNSUN

D

TxxxxD

MORNSUN

D

CNXXX

Isolation Amplifier

Isolation power output

TxxxxD

CNXXX

Isolation Amplifier

-

Sv

+

4-wire device typical application( T1133D)

Ri

Isolation power output

-

Sv

+

-

Sv

+

No. 5, Kehui St. 1, Kehui development center, Science Ave.,

Guangzhou Science City, Luogang district, Guangzhou

Power supply

Io=0~20mA

MORNSUN

Io

RL

TxxxxD

CNXXX

Isolation Amplifier

Isolation

power

output

Ri=450Ω

-

Si

+

+

+

Isolation power output -

14 +

P +

Sensor

13 -

or

field

devices -

G

12 Iin-

S

+ 11 Iin+

23

Power supply

24

DCS

PLC

Display

devices

Iout- 1 -

Iout+ 2 +

Rl≤500Ω

Isolation power output -

14

P +

+

Sensor

G1 - 13 -

or

field

devices -

G

12 Iin-

S

+ 11 Iin+

23

Power supply

24

DCS

PLC

Display

devices

Iout- 1 -

Iout+ 2 +

Rl≤500Ω

MORNSUN

TxxxxD

Isolation

power output

CNXXX

P:Input power positive pole

G: Output signal ground

S: Output signal positive pole

P: Input power positive pole S: Output signal positive pole

G1: Input power ground G: Output signal ground

IsolationAmplifer

Io=0~20mA

Io

RL

69 70

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