urgent guidelines on ABB RT6 Safety Relay
For Digital input AC800HI PLC ,can we connect field contact from 2000 Mtrs far to Relay safety input 1 contact (S13,S14)
If it is possible then do we need to consider any additional consideration
You are using HI CPU,so i guess your Digital Input Card is DI880.
According to I/O Modules and Termination Units document(3BSE020924-510 A);Input Voltage Range for "1" is from 11V DC to 30V DC.
2000 mtrs range is extremely far away for digital signal. Voltage drop could have bad effect on your signal voltage range.
You can use some repeaters in this situtation, but if your filed is atex zone so pay attantion to use Ex-i type repeaters.
Hope it helps you.