Description
The Emerson 1C31166G01 is a serial link controller module from the Ovation distributed control system (DCS) platform, designed to provide reliable serial communication interfaces for connecting controllers to field devices, legacy PLCs, RTUs, and instrumentation in industrial process automation. It functions as a communication bridge, supporting multiple serial protocols to enable data exchange between the Ovation master controllers and Modbus RTU slaves, DNP3 devices, or other serial networks. Typically installed in Ovation I/O racks or expansion chassis, the module handles bidirectional data flow with built-in error checking, buffering, and protocol conversion, making it essential for brownfield upgrades where modern Ethernet-based DCS must interface with older serial equipment without full rewiring.
EMERSON 1C31166G01
Product Parameters
The 1C31166G01 operates on a 24 V DC nominal backplane supply (18-32 V range) drawn from the Ovation rack, with typical consumption under 5 W and inrush limited to 1 A. It features dual serial ports configured for RS-232 or RS-485 (4-wire full-duplex or 2-wire half-duplex selectable), supporting baud rates from 300 bps to 115.2 kbps in standard increments. Each port handles up to 32 devices in multi-drop mode (RS-485), with galvanic isolation rated at 1500 Vrms port-to-logic and 500 V continuous port-to-port. Protocol support includes Modbus RTU master/slave, DNP3 Level 1/2, and configurable ASCII framing for custom devices. Diagnostic capabilities encompass LED indicators for port activity, errors, and link status, plus internal event buffering (512 events with 1 ms timestamps). Physical dimensions are approximately 140 mm W x 32 mm H x 305 mm D at 0.5 kg, designed for single-slot mounting in Ovation CP60 or XP60 chassis. Environmental ratings cover -40°C to +85°C operation, -55°C to +105°C storage, 5-95% RH non-condensing, 5 g vibration (5-500 Hz), 20 g shock (IEC 60068-2-27), and EMI immunity per IEC 61000-6-2 (industrial). MTBF exceeds 400,000 hours per Telcordia SR-332; firmware is field-upgradable via Ovation Control Builder.
Datasheet Overview
Datasheet specifications detail RS-485 multidrop capacity (up to 1200 m cable runs with 120 Ω termination), configurable parity (even/odd/none), data bits (7/8), and stop bits (1/2). RS-232 mode supports point-to-point up to 15 m at max baud. Modbus addressing spans 1-247 slaves with function codes 1-6, 15-16, plus diagnostics (08h). DNP3 binary/ascii outstation emulation includes unsolicited responses and time sync. Configuration parameters store in non-volatile EEPROM (10-year retention), with auto-baud detection and handshake flow control. Mechanical features include screw terminals (14-22 AWG, 0.5-0.6 Nm torque), DIN-35 rail compatibility, and finger-safe covers (IP20). Power sequencing ensures safe startup (logic before comms), with watchdog reset (<50 ms). Diagnostics report CRC errors, framing/parity faults, timeouts (>100 ms configurable), and buffer overruns via Ovation Workstation. Rack integration uses Ovation fieldbus (2 Mbps redundant), supporting hot-swap in live systems. Compliance includes CE/UL/cUL, RoHS, and marine class (DNV optional).
Origin
Emerson manufactures the 1C31166G01 at facilities in the United States, aligned with Ovation DCS production centered in North American automation hubs.
