Here’s a concise breakdown of the Honeywell 621-9939 Serial Link Module:

• Function: Controls serial I/O data transfer to and from remote I/O.

• Processor: Operates asynchronously with its own data table.

• Ports: Supports dual serial channels for efficient communication.

• Data Rate: Up to 9600 baud.

• Power Requirement: 5V DC from rack, with 300mA typical current draw.

• Compatibility: Designed for IPC 621 I/O racks.

• Operating Temperature: 0°C to 60°C.

• Dimensions: 4.5" x 1.5" x 10.0" (11.4cm x 3.8cm x 25.4cm).

• Weight: 1.2 lbs (0.54kg).

• Isolation: 500V DC to logic