Honeywell 621-9936 Serial Link Module 12-Month Warranty

FAQ

Q1: What is the main function of the 621-9936 module?
It enables bidirectional serial communication between control systems and external serial devices.

Q2: What communication types are supported?
It supports RS-232C and RS-485 interfaces.

Q3: Does the module support Modbus?
No, it only supports Honeywell proprietary serial protocols.

Q4: Are there status indicators on the module?
Yes, there are LEDs for communication, fault, and activity.

Q5: How is the module powered?
It is powered by the I/O rack at 5 VDC.

Q6: Can it communicate with third-party devices?
Primarily designed for Honeywell systems, limited third-party integration is possible via protocol converters.

Q7: Is hot-swapping supported?
No, the module must be powered off before insertion or removal.

Q8: What are its dimensions and weight?
Dimensions: 154 x 32 x 127 mm; Weight: approx. 0.66 kg.

621-9936 Honeywell Serial Link Module

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