Omron Sysmac NX Series User Manual page 92

4 Installation and Wiring
I/O Power Supply Unit is also unnecessary if you do not use the trigger inputs of the High-speed Analog
Input Units.
*2. Short-circuit cables are not included in the product.
Precautions for Correct Use
The cable length of a short-circuit cable used for current input must be 4 cm or less and allow
for wiring to the screwless clamping terminal block. Be sure to use cables and ferrules that are
applicable to the screwless clamping terminal block. If the cable is too long, the analog input
values may not be accurate.
Wiring Examples for the NX-HAD402
 Wiring Example 1 (Analog input range: Voltage)
Additional I/O
Power Supply
A1
24 VDC
A8
*1. Besides the Additional I/O Power Supply Unit, some other Units can supply I/O power to the NX bus. For
example, you can use a Connected Communications Coupler Unit. If you use this Unit to supply I/O power
to the High-speed Analog Input Units, the Additional I/O Power Supply Unit is unnecessary. The Additional
I/O Power Supply Unit is also unnecessary if you do not use the trigger inputs of the High-speed Analog
Input Units.
4 - 24
Unit *1
B1 A1
IOV IOV
IOG IOG
IOV IOV
IOG IOG
B8 A8
NX-series Analog I/O Units User's Manual for High-speed Analog Input Units (W592)
High-speed Analog Input Unit
NX-HAD402
B1 C1 D1
IN1 NC SHT1+ Input1+
IOV1 IOG1 SHT1- Input1-
IN2 NC SHT2+ Input2+
IOV2 IOG2 SHT2- Input2-
IN3 NC SHT3+ Input3+
IOV3 IOG3 SHT3- Input3-
IN4 NC SHT4+ Input4+
IOV4 IOG4 SHT4- Input4-
B8 C8 D8
Use a two-conductor shielded
twisted-pair cable. Do not
ground the shield.
Output device
Input+
Input-
Two-wire sensor
Three-wire sensor