RS204 Bachmann | 4-Channel Programmable Logic Controller Unit

Product Overview

The RS204 (Model: RS204) is a versatile serial communication interface module designed for the Bachmann M1 automation system and M200 controllers. It is specifically engineered to provide 4 independent, asynchronous serial interfaces in a single slot, facilitating seamless connectivity between the PLC and external peripheral devices such as barcode scanners, HMIs, weighing scales, or legacy industrial hardware.

Unlike standard relay modules, the RS204 (Part Number: RS204) focuses on high-speed data integrity, supporting multiple protocols including RS-232, RS-422, and RS-485 via configurable parameters. This module is essential for complex automation architectures where the controller must act as a communication hub, managing simultaneous data streams from diverse field instruments while maintaining deterministic performance across the M1 backplane.

Detailed Technical Specifications

The RS204 is built to rigorous industrial standards, ensuring precise data synchronization.

• Manufacturer: Bachmann Electronic

• Model Number: RS204

• Module Type: 4-Channel Asynchronous Serial Interface

• Number of Interfaces: 4 Independent Channels

• Interface Standards: RS-232, RS-422, RS-485 (software/hardware selectable)

• Baud Rates: 300 bps up to 115.2 kbps per channel

• Data Buffer: Integrated FIFO for transmit and receive to minimize CPU load

• Protocols Supported: Modbus RTU, 3964R, RK512, and generic ASCII

• Isolation: 500 V RMS galvanic isolation between field side and system bus

• Dimensions: 2.3 in x 2.8 in x 4.8 in (5.7 cm x 7.0 cm x 12.1 cm)

• Weight: 0.3 kg (9.6 oz)

• Communication: High-speed M1 backplane interface

• Diagnostics: Front-panel LEDs for Tx/Rx activity per channel and module status

• Power Supply: Internal via M1 backplane

• Operating Temperature: -30°C to +60°C (Extended industrial range)

• Tariff Code: 8538907080

• Compliance: EN 61131-2, CE, UL, RoHS