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Product Introduction
The Honeywell 621-9938 Serial I/O Module is a high-performance, compact module designed to facilitate serial communication within industrial automation systems. Supporting both RS-232 and RS-485 protocols, it ensures reliable data exchange between controllers and peripheral devices. Its robust design and compliance with international standards make it suitable for various industrial applications.
Product Specifications
| Parameter | Specification |
| Model Number | 621-9938 |
| Manufacturer | Honeywell |
| Product Type | Serial I/O Module |
| Communication Protocols | RS-232, RS-485 |
| Supported Points | 8/16/32 points |
| Power Supply | 24 VDC |
| Power Consumption | 5W |
| Current Consumption | 300 mA |
| Baud Rate | 9600 bps to 115200 bps |
| Isolation Voltage | 1500V RMS |
| Operating Temperature | 0°C to +60°C |
| Storage Temperature | -40°C to +85°C |
| Humidity | 5% to 95% non-condensing |
| Certifications | CE, FCC |
| Dimensions (W x D x H) | 38 x 267 x 165 mm |
| Weight | 0.699 kg |
| Country of Origin | USA |
| Warranty | 12 months |
Product Specifications
| Parameter | Specification |
|---|---|
| Model Number | 621-9938 |
| Manufacturer | Honeywell |
| Product Type | Serial I/O Module |
| Communication Protocols | RS-232, RS-485 |
| Supported Points | 8/16/32 points |
| Power Supply | 24 VDC |
| Power Consumption | 5W |
| Current Consumption | 300 mA |
| Baud Rate | 9600 bps to 115200 bps |
| Isolation Voltage | 1500V RMS |
| Operating Temperature | 0°C to +60°C |
| Storage Temperature | -40°C to +85°C |
| Humidity | 5% to 95% non-condensing |
| Certifications | CE, FCC |
| Dimensions (W x D x H) | 38 x 267 x 165 mm |
| Weight | 0.699 kg |
| Country of Origin | USA |
| Warranty | 12 months |
Product Applications
The 621-9938 Serial I/O Module is utilized across various industrial sectors to provide reliable serial communication. Typical applications include:
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Industrial Automation: Facilitating communication between controllers and devices in manufacturing and processing plants.
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Building Management: Integrating with HVAC, lighting, and security systems for efficient control and monitoring.
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Energy Management: Supporting energy monitoring and control systems to optimize consumption.
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Water and Wastewater Treatment: Enabling process control and monitoring in treatment facilities.
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Manufacturing: Ensuring precise control and monitoring in various manufacturing processes.
Product Advantages
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Versatile Communication: Supports both RS-232 and RS-485 protocols, allowing integration with a wide range of devices.
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High Reliability: Designed for stable performance in demanding industrial environments.
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Compact Design: Space-saving dimensions facilitate easy installation within control cabinets.
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Certified Compliance: Meets CE and FCC standards, ensuring adherence to safety and performance regulations.
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Flexible Configuration: Supports 8, 16, or 32 I/O points, accommodating various application requirements.
Frequently Asked Questions (FAQs)
1. What communication protocols does the 621-9938 support?
The module supports RS-232 and RS-485 serial communication protocols.
2. What is the power supply requirement for the module?
It operates on a 24 VDC power supply.
3. How many I/O points does the module support?
It supports configurations of 8, 16, or 32 I/O points.
4. What are the dimensions and weight of the module?
The module measures 38 x 267 x 165 mm and weighs 0.699 kg.
5. What is the operating temperature range?
The module operates within a temperature range of 0°C to +60°C.
6. Is the module certified for safety standards?
Yes, it holds certifications from CE and FCC.
7. What is the isolation voltage of the module?
It has an isolation voltage of 1500V RMS.
8. Can the module be used in high-humidity environments?
Yes, it operates effectively in humidity levels ranging from 5% to 95% non-condensing.
9. What is the warranty period for the module?
We provide one year warranty.
10. Where is the 621-9938 module manufactured?
It is manufactured in the USA by Honeywell.
Related Models (Same Series or Similar Functionality)
| Model Number | Description |
| 621-9935 | Serial I/O Module with RS-232/RS-485 support; compact design for smaller systems. |
| 621-9936 | High-speed serial communication module designed for fast response applications. |
| 621-9937 | Multi-channel serial I/O unit with extended protocol compatibility. |
| 621-9940C | Serial interface module with robust EMI shielding, designed for harsh environments. |
| 621-9941 | Advanced serial interface with built-in diagnostics and error logging. |
| 621-9942 | Universal serial I/O module supporting Modbus and other protocols. |
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| CC-PUIO01 | Universal I/O module supporting both analog and digital signals. |
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