Honeywell 621-9938 Serial I/O Module

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

Product Specifications

The 621-9938 Serial I/O Module is utilized across various industrial sectors to provide reliable serial communication. Typical applications include:​

• Industrial Automation: Facilitating communication between controllers and devices in manufacturing and processing plants.

• Building Management: Integrating with HVAC, lighting, and security systems for efficient control and monitoring.

• Energy Management: Supporting energy monitoring and control systems to optimize consumption.

• Water and Wastewater Treatment: Enabling process control and monitoring in treatment facilities.

• Manufacturing: Ensuring precise control and monitoring in various manufacturing processes.​

Product Advantages

• Versatile Communication: Supports both RS-232 and RS-485 protocols, allowing integration with a wide range of devices.

• High Reliability: Designed for stable performance in demanding industrial environments.

• Compact Design: Space-saving dimensions facilitate easy installation within control cabinets.

• Certified Compliance: Meets CE and FCC standards, ensuring adherence to safety and performance regulations.

• 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.​