Honeywell 621-9935 Serial I/O Modules 100% New

FAQ

Q1: What communication protocols does the 621-9935 support?
It supports standard Modbus RTU and Honeywell proprietary serial protocols.

Q2: How many serial ports are available on the module?
The module provides 2 independent RS-232 or RS-485 serial ports.

Q3: Does it support automatic switching between RS-232 and RS-485?
No, switching must be done manually or by configuration.

Q4: Is electrical isolation provided between ports?
Yes, electrical isolation is provided between the two serial channels.

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

Q6: Is redundancy supported?
The module itself does not provide redundancy but can be used in a redundant setup.

Q7: Which Honeywell systems is it compatible with?
Compatible with Honeywell TPS and TDC 3000 platforms.

Q8: What are its dimensions and weight?
Dimensions: 264 x 32 x 127 mm; Weight: approx. 0.63 kg.

621-9935 Honeywell Serial I/O Modules

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