Terminal Block Diagram - Omron CJ Series Operation Manual

3 Isolated-type Universal Input Units
Wiring Analog Inputs
Ground the shield of the shielded cable to protect against the affects of noise.
Analog
output signal
Precautions for Correct Use Precautions for Correct Use
• Be sure to wire the correct terminals when wiring voltage inputs. The Unit may fail if a voltage-
input is wired incorrectly.
• Do not connect anything to terminals that are not being used.
• Do not connect anything to NC terminals.
• Wire the same lengths to A, B, and b so that the impedance will be the same. In particular, do
not short circuit between B and b at the terminal block. (in the case of resistance thermometer)
• Always ground the GR terminal on the Power Supply Unit.
• Be sure to ground all input devices (such as voltage generators, temperature calibrators, and
resistors) that have ground terminals.

3-1-11 Terminal Block Diagram

Internal Configuration
Bus
interface
Oscilla-
tor
I/O Bus
3-12
Two-core, shielded
twisted-pair cable
CJ1W-AD04U
Universal Input Unit
FG
Indicators/
Switch
MPU
RAM ROM
Division
CJ-series Analog I/O Units Operation Manual for NJ-series CPU Unit(W498)
Double
integration
A/D
Double
integration
A/D
Double
integration
A/D
Double
integration
Non-volatile
A/D
Memory
Isolated
+5 V
power
circuit
Input 1
Amplifier
Terminal
block
Input 2
for
Amplifier
external
terminal
connections
Input 3
Amplifier
Input
Input 4
Amplifier
Input 1
Input 2
Input 3
Input 4