User Manual
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RS-422/2W RS-485/4W RS-485 (Terminal Block) Pinouts 
PIN 
RS-485 
(2W) 
RS-422/ 
RS-485 (4W) 
1 
– 
TxD+(B) 
2 
– 
TxD-(A) 
3 
Data+(B) 
RxD+(B) 
4 
Data-(A) 
RxD-(A) 
5 
GND 
GND 
Four cables are available as optional accessories that can be used to 
connect the NPort IA5000A Series to RS-232 serial devices. For your 
convenience, we show precise cable wiring diagrams for each of the two 
cables. 
Female DB9 to Male DB9 
Female DB9 to Male DB25 
ATEX and IECEx Information 
1.  DEMKO Certification number: 12 ATEX 1014487X 
IEC Certification Number: IECEx UL 13.0024X (only for models with 
suffix –CT or –IEX) 
2.  Ambient Temperature Range (-40°C ≤ Tamb ≤ 75°C) 
3.  Certification String: Ex nA nC IIC T3 Gc 








