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Honeywell 621-9938 | IPC 620/621 Serial Communication Module
Manufacturer: Honeywell
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Part Number: 621-9938
Condition：New with Original Package
Product Type: Serial Communication Module
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Honeywell 621-9938 Serial I/O Module (SIOM) Overview
The Honeywell 621-9938 is a dual-port Serial I/O Module engineered for IPC 620/621 control systems. It enables seamless communication between the controller and serial-based field devices, including sensors, actuators, HMIs, and printers.
With support for multiple serial protocols and advanced diagnostics, this module ensures reliable data transfer, fast response, and high flexibility in industrial automation environments. Front-panel LEDs provide real-time status and fault indicators, simplifying monitoring and maintenance.
Technical Specifications
| Feature | Description |
|---|---|
| Model Number | 621-9938 |
| Type | Serial I/O Module (SIOM) |
| Communication Ports | Dual RS-232 / RS-485 serial ports |
| Supported Protocols | Modbus RTU, ASCII, proprietary Honeywell protocols |
| Number of Channels | 16 digital input/output channels |
| Power Supply | 24 VDC input voltage |
| Operating Temperature | –40°C to +70°C industrial-grade range |
| Diagnostics | Front-panel LEDs for status and fault indication |
| Mounting | Rack-mounted within IPC 620/621 chassis |
| Isolation | Electrical isolation between ports and system bus |
| Dimensions | Standard IPC module size, compact footprint |
| Weight | 1.54 lbs (0.70 kg) |
| Certifications | CE compliant; meets industrial automation standards |
| Warranty | Typically 12 months from authorized distributors |
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