Honeywell 900PSM-0001 appears to be a Redundant I/O Power Status Module for the Honeywell HC900 controller system.

Unfortunately, there isn’t a readily available public datasheet for the 900PSM-0001 that I could find. However, based on the information I gathered from various sources, here’s what I can tell you about its technical specifications:

• Function: Provides redundant power and status monitoring for the I/O modules in the HC900 controller system.
• Compatibility: Works with the HC900 controller.
• Power consumption: Maximum of 22mA at 5VDC.
• Operating temperature: 0 to 60 degrees Celsius.
• Safety: Division 2 Class I.
• Part number: 900PSM-0001.