Part Code Definition

1C31xxx: Ovation EMOD series module fixed prefix

166: exclusive coding for serial link communication controller

G02: second generation hardware revision

Technical Specifications

Backplane 5VDC power supply, typical power consumption 4.7W;

Dual independent serial channels: Channel1 RS232, Channel2 4-wire RS485 differential transmission;

Supported baud rate: 300~115200bps configurable; master protocol: Modbus RTU, DNP3, custom serial frame;

1500VAC isolation between field serial circuit and system backplane internal bus;

Ambient range: -40℃~+70℃, 5%~90%RH non-condensing, hot plug supported on standard Ovation rack;

Dimension:52×133×212mm, net weight approx 0.42kg.

Interface & Communication Layout

Rear golden finger connects rack backplane for internal data exchange with Ovation R1120 CPU backplane bus;

Front terminal block for RS232/RS485 field wiring to external PLC, intelligent transmitters and auxiliary control cabinet;

Front panel LED indicators: RUN module running, FAULT communication fault, CH1/CH2 channel active status lamp.

Core Functions

Act as serial master station to poll external slave devices cyclically, collect field digital/analog register data and upload to Ovation main controller;

Distribute DCS downlink control commands and write parameters into third-party equipment register address via serial bus;

Per-channel wiring open/short-circuit & communication timeout self-diagnosis, fault log auto uploaded to Ovation alarm system;

Online protocol, station address and baud rate configuration via Ovation engineering software without module offline;

Two channels work independently, single channel failure will not interrupt the other serial communication link.

Application Scenarios

Thermal power plant boiler auxiliary PLC, water treatment local control cabinet Modbus data access to Ovation DCS; petrochemical device intelligent instrument, compressor local PLC serial signal docking, old Ovation DCS upgrade spare stocking.

Operation & Maintenance Notes

RS485 field cable uses double-core shielded twisted pair, single-point shielding grounded inside main control cabinet;

Separate serial wiring from high-power AC power cable to avoid electromagnetic interference;

Consistent baud rate, parity and station address between DCS configuration and field slave equipment during commissioning; replace module after eliminating field wiring and slave device abnormal faults.