Invensys Triconex 4118 Enhanced Intelligent Communication Module

TRICONEX 4118 Enhanced Intelligent Communication Module (EICM) — Isolated

The TRICONEX 4118 is an Enhanced Intelligent Communication Module (EICM) with isolated serial ports for the Triconex Tricon safety system. It provides serial communication interfaces (RS-232/RS-422/RS-485) for connecting to external devices, HMIs, and third-party systems. The isolated version ensures 500 VDC galvanic separation between the Tricon system and external communication networks, protecting against ground loops and electrical noise.

• Type: Enhanced Intelligent Communication Module (EICM) — Isolated
• Serial Ports: Multiple RS-232 / RS-422 / RS-485 ports (DB-9 connectors)
• Port Isolation: 500 VDC galvanic isolation
• Protocols Supported: Modbus RTU/ASCII (Master/Slave), TriStation proprietary, custom serial protocols
• Baud Rates: Up to 115.2 kbps per port
• Compatibility: Tricon v9.x and v10.x systems
• Diagnostics: PASS / FAULT / ACTIVE indicators; port status LEDs

Installation Guide

1. Install the 4118 into a communication slot in the Tricon main chassis (8110).
2. Connect serial cables to the DB-9 ports. Use shielded cables for RS-485/RS-422 to minimize EMI.
3. Configure port parameters (baud rate, parity, protocol) in TriStation 1131 communication configuration.
4. For Modbus applications, set the 4118 as Master or Slave and map registers to Tricon internal variables.
5. Verify communication health via diagnostic LEDs and TriStation online monitoring.

FAQ

Q: What is the difference between 4108, 4118, and 4119?
A: The 4108 is the non-isolated EICM. The 4118 is the isolated EICM (galvanic isolation on serial ports). The 4119/4119A are enhanced versions with additional features. Choose 4118 when ground isolation is required between the Tricon and external serial devices.

Q: Can the 4118 communicate over Ethernet?
A: No. The 4118 provides serial communication only. For Ethernet/IP, Modbus TCP/IP, or OPC connectivity, use the 4351B/4352B/4353 TCM or 4329 NCM modules.

Q: How many serial devices can I connect to one 4118?
A: The 4118 provides multiple serial ports (typically 4). Each port can connect to one device in RS-232 mode, or up to 32 devices in RS-485 multi-drop mode.

Selection Tips

• Choose 4118 when connecting to serial-based HMIs, SCADA systems, or third-party controllers that require electrical isolation.
• For non-isolated serial connections in controlled environments, the 4108 offers the same functionality at lower cost.
• Verify baud rate and protocol compatibility with your external device before ordering.
• For modern Ethernet-based integration, pair the 4118 with a TCM (4351B/4353) for dual-protocol support.