TC-MUX021 2-Channel Serial Interface Module Honeywell

TC-MUX021 Two-Channel Serial Interface Module

Product Introduction

The TC-MUX021 is a double slot-width serial interface module for Honeywell control systems. System integrators use it to link serial field devices into the controller backplane. Specifically, it provides two communication ports, one per Field Termination Assembly (FTA).

Each port supports a selectable physical interface. Engineers can configure EIA RS-232D with a DB-25 connector or EIA RS-422/485D with a 5-terminal compression connection. Therefore, the same module serves short-run point-to-point links and longer multi-drop networks. Additionally, a maximum of 3 SI modules may reside in one controller, giving up to six serial ports per system.

Technical Specifications

Communication speed reaches a maximum of 19.2 kb/s per FTA. This rate suits Modbus RTU polling and DF1 messaging without saturating the link. Supported FTA models include MU-TSIM12 for Modbus and MU-TSIA12 for Allen-Bradley DF1. Consequently, you select the FTA according to the field protocol, then set the interface type per port.

The module dissipates 10W of power internally. Therefore, cabinet thermal design should account for this heat load. Dielectric withstand is 500V to ground, which protects the backplane from field transients. The module connects through the TC-KSM003 power adapter cable.

Environmental and Immunity Parameters

The TC-MUX021 tolerates vibration and shock from 10 to 50 Hz at 5 g, plus 30 g peak shocks of 11 ms duration during operation. Electrostatic discharge testing covers 2 kV to 15 kV anywhere on the case, with 10 kV on RS port lines. Noise immunity reaches 10 V/meter across 20 MHz to 100 MHz. These ratings support deployment in electrically noisy plant environments.

Mechanical Parameters

This is a double slot-width module, so it occupies two chassis slots. The TC-KSM003 power adapter cable supplies module power from the backplane. Plan panel layout with the extra slot width in mind. Meanwhile, keep serial cables separated from high-voltage wiring to preserve signal integrity.

Installation Guide

First, mount the FTA for each port and select the physical interface. Use RS-232D for short point-to-point runs, or RS-422/485D for longer or multi-drop networks. Next, set the communication speed up to 19.2 kb/s to match the field device.

Then install the TC-MUX021 in two adjacent chassis slots. Connect the TC-KSM003 power adapter cable to the backplane. After that, wire each port to its FTA and confirm the protocol matches the FTA model: MU-TSIM12 for Modbus, MU-TSIA12 for DF1. Finally, verify grounding and cable shielding to support the module's ESD and noise immunity ratings.

Packaging List

• 1 × TC-MUX021 serial interface module

• 1 × Installation instruction sheet

• 1 × Anti-static protective bag

• 1 × Anti-vibration packing insert

Shipping is available via Fedex, UPS, and DHL. Orders typically ship within 3–5 business days after payment confirmation.

FAQ

Q1: How many communication ports does the TC-MUX021 provide?
A: It provides two ports, one per Field Termination Assembly.

Q2: Which physical interfaces are selectable?
A: Each port supports EIA RS-232D (DB-25) or EIA RS-422/485D (5-terminal compression), selectable per FTA.

Q3: Which FTA models are supported?
A: The module supports MU-TSIM12 for Modbus and MU-TSIA12 for Allen-Bradley DF1.

Q4: What is the maximum communication speed?
A: Speed reaches 19.2 kb/s per FTA.

Q5: How many SI modules can one controller hold?
A: A controller supports a maximum of 3 SI modules, giving up to six serial ports.