1C31166G02 Controller

1C31166G02 is a serial link controller (LC card) for Emerson’s Ovation/Mark VIe system, non DeltaV, and has been discontinued.
1、 Basic Information
Model: 1C31166G02 (alias: LC card, RS485 data connection card)
Brand: Emerson/Westinghouse
Series: Ovation DCS/Mark VIe Steam Turbine Control
Type: Serial Link Controller Module
Function: Protocol conversion gateway for DCS controller and third-party serial devices (RS-232/485), supporting Modbus/DNP3/Profibus DP

2、 Core parameters
CPU: R1120 processor
Memory: 128 MB RAM/256 MB Flash
interface
2 × RS-232/485 (4-wire)
4 x Ethernet
Protocol: Modbus RTU/TCP, DNP3, Profibus DP
Speed: RS-232 up to 115 kbps; RS-485 has a maximum speed of 3.125 Mbps
Power supply: 24 VDC
Temperature: -40 ℃~+70 ℃
Size: Approximately 216 × 330 × 140 mm
3、 Discontinuation and Replacement (as of May 22, 2026)
Status: Discontinued, no longer produced by the original factory
EOL time: Announcement from 2018 to 2020, final delivery around 2021
Alternative model:
1C31169G02 (compatible with functions/pins, stronger performance)
Or upgrade to ELC card (5X00419G01) (Ethernet Link Controller)
4、 Application scenarios
Industry: Electric power (thermal/nuclear power), oil and gas, large-scale process industry
System: Ovation DCS, Mark VIe turbine control system
Purpose: To connect third-party devices such as serial instruments, frequency converters, PLCs, etc