Honeywell TC-CEN021 Communication Interface Module

Technical Specifications Overview

The table below details the core technical parameters of this communication interface module.

Parameter	Specification
Model Number	TC-CEN021
Product Type	Communication Interface Module
Compatible System	Honeywell Experion PKS Series
Network Interface	1 x Ethernet (10/100BASE-TX)
Serial Interface	1 x RS-232C, 1 x RS-485
Connector Type (Ethernet)	RJ45 (shielded)
Connector Type (Serial)	9-pin D-sub (RS-232), 5-pin terminal (RS-485)
Supported Protocols	Modbus RTU, Modbus TCP, DNP3, Honeywell CDA
Maximum Devices (RS-485)	32 nodes (multidrop)
Maximum Distance (RS-485)	1,200 meters
Data Transfer Rate (Ethernet)	10/100 Mbps (auto-negotiating)
Data Transfer Rate (Serial)	300 bps to 115.2 kbps
Serial Isolation	1500 VAC (RS-485 port)
Internal Power Draw	5 VDC, 400 mA
Dimensions (W x H x D)	45 mm x 130 mm x 120 mm
Weight	0.28 kg
Indicators	5 LEDs (PWR, ETH, COM1, COM2, FAULT)
Operating Temperature	0°C to +60°C

Comprehensive Multi-Protocol Connectivity

The TC-CEN021 communication interface module bridges the Experion PKS system with external devices and networks. This communication interface module combines Ethernet and dual serial ports in a single, compact unit. The Ethernet port supports Modbus TCP and Honeywell CDA protocols, enabling seamless integration with plant-wide networks and higher-level systems.

The RS-232C and RS-485 ports support Modbus RTU and DNP3 protocols, connecting with a wide range of field devices. The TC-CEN021 serves as a universal gateway, translating between different protocols and simplifying system architecture. This versatility reduces the number of interface modules needed for complex installations.

Flexible Serial Communication Capabilities

This communication interface module’s RS-485 port operates in multidrop mode, supporting up to 32 devices over distances reaching 1,200 meters. The RS-485 port features 1500 VAC isolation, protecting the module and controller from electrical noise and ground loops. Both serial ports allow independent configuration of baud rate (300 bps to 115.2 kbps), data bits, parity, and stop bits.

The TC-CEN021 manages all protocol processing autonomously, minimizing the impact on the main controller’s scan time. The module also supports simultaneous communication on all ports, enabling concurrent data exchange with multiple external systems.

Physical Design and Status Indication

This communication interface module occupies a single slot in the Experion 13-slot chassis and measures 45 mm in width. The module weighs 0.28 kg, making handling straightforward during installation and replacement. The front panel provides RJ45, 9-pin D-sub, and 5-pin terminal connectors for all network and serial interfaces.

Five LEDs deliver comprehensive status indication: a green PWR LED for power, a green ETH LED for Ethernet activity, green COM1 and COM2 LEDs for serial communication, and a red FAULT LED for error conditions. These indicators enable rapid troubleshooting of communication issues without requiring diagnostic software.

Power and Environmental Specifications

The TC-CEN021 draws 400 mA from the 5 VDC backplane, ensuring stable operation in fully populated racks. This communication interface module operates reliably across a temperature range of 0°C to +60°C. It also withstands humidity from 5% to 95% (non-condensing) and resists vibration up to 2G at 10-150 Hz.