Technical analysis of Bently Nevada 125768-01 RIM I/O module

1. Core functions
   Interface configuration: integrated RS-232/RS-422 serial communication port.
   Protocol support: compatible with Modbus RTU/ASCII, specially designed for 3500 monitoring system.
   Signal conversion: realize bidirectional transmission of frame data and external system.

Jumper configuration
Terminal resistance: 120 Ω (enabled for RS-422 long-distance transmission)
Flow control mode: RTS/CTS hardware flow control (jumper J1:1-2)

Security and authentication
Industry standard:
API 670 (mechanical protection system)
IEEE 1156 (serial communication reliability)
Explosion-proof certification: ATEX Zone 2 (optional model)
Operational suggestion
Configuration steps:
Use 3500 configuration software to set Modbus register mapping (refer to section 4.5 of the document).
Disable unused protocols to reduce CPU load
EMC protection:
When the transmission distance of RS-422 is more than 15m, twisted-pair shielded cable (AWG22+) is used.