Omron CP1L - 12-2007, Operation Manual

Page: 454 / 673

419
Analog I/O Units
Section 7-4
Analog Output Wiring
Analog I/O Wiring Example
Note (1) For analog outputs it is possible to use both voltage outputs and current
outputs at the same time, but the total current output must not exceed
21 mA.
(2) Use 2-core shielded twisted-pair cables.
(3) Wire away from power lines (AC power supply wires, power lines, etc.)
(4) When an input is not being used, short V IN and I IN to the COM terminal.
(5) Use crimp terminals. (Tighten terminals to a torque of 0.5 N·m.)
(6) When using current inputs, short V
IN
to I
IN
.
(7) When there is noise in the power supply line, install a noise filter on the
input section and the power supply terminals.
Creating a Ladder
Program I/O Allocation
Two input words and one output word are allocated to the Analog I/O Unit,
starting from the next word following the last allocated word on the CPU Unit
or previous Expansion Unit or Expansion I/O Unit.
Analog I/O Unit
+
−
+
−
VOUT
I OUT
COM
Voltage Outputs
Current Outputs
Analog I/O Unit
VOUT
I OUT
COM
0 V
0 V
F G
F G
2-core shielded
twisted-pair cable
Analog
input
device
voltage
input
2-core shielded
twisted-pair cable
Analog
input
device
current
input
Voltage output (+)
Common (
−
)
VOUT
I OUT
COM
V IN1
I IN1
COM1
COM2
I IN2
V IN2
Using analog output as a voltage output