Bachmann RS204 Serial Communication Module

Product Description

Configured for four-channel serial data exchange, the Bachmann RS204 (RS204 Serial Communication Module) provides physical interfaces for RS232, RS422, and RS485 communication within an industrial control system. The module supports data rates up to 115.2 kbaud and receives 5 V DC system power.

Hardware Specifications

Industrial Serial Communication Interface

The RS204 provides four independent serial ports for controller-to-device communication. Each port supports RS232, RS422, or RS485 electrical interfaces. Therefore, the selected interface should match the connected field device and cable arrangement.

The module supports communication rates up to 115.2 kbaud. RS422 and RS485 configurations support differential signaling, while RS232 provides single-ended serial communication. Each channel uses a Sub-D 9-pin connector for physical termination.

PLC Backplane and Interface Considerations

The RS204 receives 5 V DC through the host system rather than through an independently specified field power input. Its stated power consumption remains below 3 W.

The four-channel architecture allows multiple serial devices to connect through one communication module. However, each connected device should use the corresponding electrical interface and compatible communication settings.

Frequently Asked Questions

Q: How many serial communication channels does the RS204 provide?
A: The RS204 provides four independent serial communication ports.

Q: Which serial interfaces does the RS204 support?
A: The module supports RS232, RS422, and RS485 interfaces.

Q: What power supply does the RS204 require?
A: The RS204 receives 5 V DC through the system and consumes less than 3 W.

Field Installation Guidelines

Install the RS204 in the designated system mounting position and secure the module according to the host system's mechanical requirements.

Select RS232, RS422, or RS485 wiring according to the connected equipment. Keep communication cables separated from high-voltage and high-current power wiring where practical to reduce electrical interference.

Terminate each serial connection using the appropriate Sub-D 9-pin connector. Verify signal assignment before energizing the system.

For shielded communication cables, connect the shield according to the control-system grounding design. Avoid creating unintended ground loops through multiple shield termination points.

Before commissioning, verify the communication interface, baud rate, cable polarity where applicable, and connected-device configuration. Also confirm that the system supplies the specified 5 V DC module power.

Other Attributes

• Country of Origin:  Austria
• Lead Time: In Stock, 2 Working Days

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