Omron CP1L Operation Manual page 461

Analog Input Units
Internal Circuits
2-core shielded
twisted-pair cable
+
Analog
device with
voltage
−
output
2. Wiring Analog Inputs
Analog ground
■ Wiring for Analog Inputs
V IN
Analog
I IN
Input
Unit
COM
FG
Note (1) Connect the shield to the FG terminal to prevent noise.
(2) When an input is not being used, short the + and – terminals.
(3) Separate wiring from power lines (AC power supply lines, high-voltage
lines, etc.)
(4) When there is noise in the power supply line, install a noise filter on the
input section and the power supply.
(5) Refer to the following information on open circuits when using voltage in-
puts.
510 kΩ
250 Ω
510 kΩ
250 Ω
510 kΩ
510 kΩ
AG
Analog
device with
current
output
V IN1
I IN1
Analog input 1
COM1(−)
to
to
V IN4
I IN4
Analog input 4
COM4(−)
2-core shielded
twisted-pair cable
+
−
Section 7-2
V IN
Analog
I IN
Input
Unit
COM
FG
427