Honeywell 51304516-250 MC-PSTX03 Interface Card

Product Overview

The Honeywell 51304516-250 MC-PSTX03 functions as a communication interface card for system expansion. This card bridges the connection between the main controller and external serial devices. It facilitates data exchange with printers, terminals, and other auxiliary equipment. The unit installs directly into Honeywell Series C or TDC 3000 chassis.

Technical Specifications

Parameter	Specification
Model Number	51304516-250 MC-PSTX03
Product Type	Serial Interface Card
Interface Type	RS-232 / RS-422 / RS-485 selectable
Ports	1 serial communication port
Baud Rate	300 to 38,400 bps
Data Bits	7 or 8 bits
Parity	None, odd, even
Stop Bits	1 or 2 bits
Isolation	1500 VAC optical isolation
Power Consumption	2.8 W typical
Operating Temperature	0°C to 60°C
Storage Temperature	–40°C to 85°C

Physical Dimensions and Mounting

This interface card measures 125 mm in height, 45 mm in width, and 160 mm in depth. The unit weighs approximately 0.30 kg. It mounts onto a standard DIN rail within the system cabinet. The front panel features LED indicators for transmit and receive activity. These LEDs provide immediate visual feedback for data flow status.

Electrical Interface and Connectivity

A 9-pin D-sub connector serves as the physical interface for serial communication. The card supports RS-232, RS-422, and RS-485 protocols through configuration jumpers. You can select the appropriate mode using onboard jumper settings. The card includes built-in termination resistors for RS-485 multi-drop networks. The serial port handles both asynchronous and synchronous data transmission. External devices like operator panels, barcode readers, and serial printers connect directly to this port.

Communication Performance and Protocol Handling

The 51304516-250 MC-PSTX03 supports baud rates up to 38,400 bits per second. It handles various data formats including 7 or 8 data bits with optional parity. The card buffers incoming and outgoing data for reliable transmission. Built-in error checking detects framing and parity errors during communication. Furthermore, the optical isolation protects the main controller from ground loops. This isolation withstands 1500 VAC for robust electrical safety.

Installation and Configuration

You can place this interface card in any available I/O slot within the chassis. The backplane automatically provides power and handles address allocation. Always set the jumper switches to match your external device specifications. Verify the cable pin-out matches the device manufacturer requirements. For multi-drop RS-485 networks, enable the appropriate termination resistors. Test the communication parameters with a terminal program before connecting critical equipment.

Environmental Compliance and Certification

This card carries CE marking and UL recognition for industrial use. It also complies with RoHS and WEEE directives for environmental responsibility. The conformal coating protects the PCB against moisture and dust. This coating ensures long-term reliability in typical control room environments.