Wiring For Analog Inputs - Omron CP1L-EL20DR-D Operation Manual

Built-in Analog Input

Wiring for Analog Inputs

Note
!Caution When connecting the analog option board to an outside analog device, either
Application Example
Note
430
Side Front
0.4mm 2.5mm
To prevent noise, 2-core shielded twisted-pair cable should be used. And the
shield can be connected to the FG terminal if necessary.
2-core shielded
twisted-pair cable
+
Analog
device with
voltage
−
output
(1) If necessary, connect the shield to the FG terminal to prevent noise.
(2) Separate wiring from power lines (AC power supply lines, high-voltage
lines, etc.)
(3) When there is noise in the power supply line, install a noise filter on the
input section and the power supply.
ground the 0 V side of the PLC's external power supply or do not ground the
PLC's external power supply at all. Otherwise the PLC's external power sup-
ply may be shorted depending on the connection methods of the outside ana-
log device. DO NOT ground the 24 V side of the PLC's external power supply,
as shown in the following diagram.
Non-insulated DC power supply
24 V
0 V
FG
Setting the value for timer T101 in A643 makes it possible to use T101 as a
variable timer with a range of 0 to 100.0 s (0 to 1000). A change in the set
value is reflected with the next scan.
Start input
T0101
External analog setting input values may vary with changes in the ambient
temperature. Do not use the external analog setting input for applications that
require highly precise set values.
V IN
Analog
I IN
Input
Unit
COM
FG
Twisted-pair
cable
0 V
FG
CPU Unit
FG
TIMX
0101
A 643
100.01
Section 8-4
0 V
Analog Device
FG