OPERATION MANUAL CompoBus/S

Remote I/O Modules Section 5-3
266
Precautions on Bending Conductor Pattern
When it is necessary for the conductors of the pattern connecting the BD L
and BD H terminals of the terminal block to those of either SRT@-ID16P or
SRT@-OD16P to change direction, make sure the direction does not veer at a
right angle. Keep the direction change within 45°.
BD L
Terminal
block
BD H
Within 45 °
SRT-ID16P/
OD16P
Noise Protection Circuit Add the following protection circuit if noise is generated from the power supply,
input section, or output section.
Power supply noise protection
circuit
V
L
+
50 V 50 V
100 µ F 0.1 µ F
BS +
SRT@
BS –
L: Coil for the common mode
(100 µH min.)
Install the coil near the SRT@.
V: 24 V DC
(Even if a separate power supply is
used, the same kind of protection is
recommended.)
Note 1. Mounting and PCB Cleaning:
If a soldering iron is used to solder the circuit, make sure that the circuit
is soldered within 3 s at 280 to 300°C.
If a soldering tub is used to solder the circuit, make sure that the circuit
is soldered within 5 s at 260°C maximum.
Do not pass through a reflow furnace. If it is necessary to pass through
a reflow furnace, after reflow processing manually apply soldering only
to the main parts.
Do not apply strong acid or alkali solvent to clean the flux. Also, do not
apply ultrasonic cleaning.
BD L
BD H
Input section noise protection circuit Output section noise protection
circuit
PLC: Photocoupler
V
Input
device
R1
D
C
R2
PHC
0 to 15
SRT@
R1: Resistor for limiting photocoupler
input current
D: Photocoupler protection diode
C: Noise absorption condenser
R2: Resistor for limiting operating level
PHC: Photocoupler
V: DC power supply
Recommended circuit example:
R1: 2.7 kΩ; 1/2 W
R2: 390 Ω; 1/4 W
C: 50 V; 0.1 µF min.
(However, these are only examples and
are not guaranteed values. Construct
the circuit in accordance with the characteristics
of the input device to be connected.)
G
BS +
0 to
15
SRT@
G
R
PHC
R
C R
Load
V
D SA
C: 0.1 µF min.
R: Limiting resistor
SA: Varistor
D: Back-electromotive force protection
diode
PHS: Photo coupler
V: DC power supply