This module supports a variety of industrial standard communication protocols, and features high reliability, strong anti-interference capability, and flexible topology adaptability. It is widely used in fields such as power generation, petrochemicals, water treatment, and metallurgy — where strict requirements are imposed on the real-time performance and stability of control signals.As a "communication bridge" of the Ovation DCS, it can connect devices including PLCs, intelligent instruments, remote I/O modules, and third-party control systems. It realizes data acquisition, command issuance, and system collaborative control, helping industrial users build an integrated and highly available automated control network. Meanwhile, it meets the core needs of process monitoring, fault diagnosis, and safety interlocking.

As a core communication component of Emerson Ovation DCS, the 1C31166G01 module  core functions and communication characteristics are reflected in three aspects: First, it supports multi-protocol compatibility, including protocols such as Modbus RTU/ASCII, DF1, and Profibus-DP (some versions). Each communication port can be independently configured with parameters like protocol type and baud rate, enabling connection to PLCs, intelligent instruments, and other devices from different manufacturers without the need for additional conversion modules. Second, it adopts a dual-serial-port design (RS-232/RS-485 optional): the RS-232 port is suitable for point-to-point communication within 15 meters, while the RS-485 port supports bus-type topology within 1200 meters and connection of up to 32 slave devices. With a maximum baud rate of 115200bps and anti-interference circuits, it ensures low-latency and low-bit-error transmission. Third, it features high-reliability mechanisms, including support for main-standby port redundant switching (switching time < 1 second), real-time fault diagnosis and reporting, and buffering and retransmission of 100 pieces of key data. These mechanisms prevent system shutdown caused by communication interruptions and meet the strict stability requirements of industrial scenarios.

Technical Specifications and Hardware Parameters

The core model of the module is Westinghouse Emerson 1C31166G01, a dedicated serial link controller module for Ovation DCS. It is compatible with Emerson Ovation DCS V3.0 and later versions, and system firmware compatibility needs to be confirmed.The module is equipped with 2 independent serial ports, which support RS-232/RS-485 switching via hardware jumpers or software configuration. It supports protocols including Modbus RTU/ASCII, DF1, and Profibus-DP (optional, requiring firmware support). The baud rate range covers 1200bps, 2400bps, 4800bps, 9600bps, 19200bps, 38400bps, 57600bps, and 115200bps. The data format parameters are configurable: 7 or 8 data bits, 1 or 2 stop bits, and parity modes including no parity, odd parity, and even parity.In terms of transmission performance, the maximum transmission distance for RS-232 is 15 meters, while for RS-485 (using shielded twisted-pair cables) it reaches up to 1200 meters. The RS-485 port can support a maximum of 32 slave devices, and this number can be extended to 128 via a repeater.For power supply, the module obtains 5V DC/24V DC power from the Ovation controller backplane (the specific voltage depends on the DCS rack model), with a typical power consumption of less than 5W. Its physical dimensions are 101.6mm in height × 160mm in width × 228.6mm in depth, fitting into the standard 3U rack slot of Ovation systems, and it weighs approximately 800g.The module is designed for industrial environments, operating within a temperature range of 0℃ to 60℃ (industrial-grade wide-temperature design) and a humidity range of 5% to 95% RH (non-condensing). It has an IP20 protection rating (for rack mounting, requiring coordination with the overall protection of the control cabinet) and complies with certification standards such as UL 508 (safety standard for industrial control equipment), EN 61000-6-2 (EMC immunity for industrial environments), and CE certification. Additionally, it supports dry contact alarm output (closed when a fault occurs), which can be connected to external audible and visual alarms.

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