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