Honeywell 900H01-0202 8-Channel Relay Output Module
Product Introduction
The Honeywell 900H01-0202 provides eight individually isolated relay outputs. Four of these outputs are Form C, and the other four are Form A. Users must install external fuses at each field device because this module does not include built-in fusing. A green LED per channel lights up when the output is ON. A blinking green status LED confirms the module is being scanned by the controller. Meanwhile, a red status LED alerts you to any module or channel diagnostic issues.
Technical Specifications
Output Channels: 4 Form A (normally open), 4 Form C (changeover)
Output Device: Electromechanical relay
Voltage Rating: 120/240VAC or 30VDC (red)
Current Rating (resistive): 4A @ 240VAC or 30VDC (red)
Current Rating (incandescent lamp): 0.5A @ 240VAC or 30VDC
Galvanic Isolation: Relay contact to relay contact, and relay contact to logic
Max. Leakage Current: 1 mA @ 350 VDC
De-rating: None – outputs can run at max load simultaneously
Max. Modules per Rack: None
OFF to ON Response Time: 11 ms maximum (excluding controller scan time)
ON to OFF Response Time: 8 ms maximum
Expected Mechanical Life: 5 x 10⁷ operations at 180 cpm
Expected Electrical Life: 10⁵ operations
Fail Safe State Configuration: Yes – options include Hold Last State or Failsafe State
Frequently Asked Questions (FAQ)
1. Does the Honeywell 900H01-0202 include built-in fuses?
No. The module does not have internal fuses. You must install an external fuse at each field device based on your load and wiring.
2. Can I mix AC and DC loads on different channels?
Yes. Each channel is individually isolated. You can connect some channels to 120VAC and others to 30VDC on the same 900H01-0202.
3. What happens if the controller loses communication?
The module supports failsafe configuration. You can set it to either hold the last state or switch to a predefined failsafe state.
4. How do I know if a channel is working correctly?
A green LED per channel turns on when the output is active. A red status LED on the module indicates any diagnostic fault.
5. What is the maximum switching frequency for this relay module?
For mechanical life, the relay supports 180 cycles per minute. For electrical loads, refer to the 10⁵ operations expected life at rated current.
