Honeywell 621-0004 | System Diagnostic Module for IPC 620/621
Manufacturer: HONEYWELL
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Part Number: 621-0004
Condition：New with Original Package
Product Type: System Diagnostic Module for IPC 620/621
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Country of Origin: Japan
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Honeywell 621-0004 System Diagnostic Module Overview
The Honeywell 621-0004 is a specialized System Diagnostic Module (SDM) designed to enhance safety and reliability in Honeywell IPC 620/621 programmable controller systems. Acting as a watchdog timer, it continuously monitors the health of control and data lines. Upon detecting a system fault, the onboard relay de-energizes, effectively removing power from output modules to safely halt the controlled process.
This module is essential in fail-safe architectures where rapid fault detection and response protect equipment, personnel, and process integrity. Its industrial-grade design ensures robust performance in harsh operating environments with EMI, vibration, and temperature extremes.
Technical Specifications
| Feature | Description |
|---|---|
| Model Number | 621-0004 |
| Type | System Diagnostic Module (SDM) |
| Function | Monitors control and data lines; triggers shutdown on faults |
| Watchdog Relay | Onboard relay de-energizes outputs during fault conditions |
| Input Voltage | Typically 24 VDC (system supplied) |
| Response Time | Immediate (milliseconds) |
| Mounting | Rack-mounted within IPC 620/621 chassis |
| System Compatibility | IPC 620 and IPC 621 PLC systems |
| Environmental Rating | Industrial-grade; EMI, vibration, and temperature resistant |
| Certifications | CE, UL, CSA compliant |
| Weight | 1.50 lbs |