Description
Overview
The Honeywell 621-9939 is a high-performance Serial Link Module designed for integration within Honeywell Distributed Control Systems (DCS). It provides secure and reliable serial communication between controllers and field devices, ensuring uninterrupted process monitoring and control in industrial environments. Its compact form factor and robust construction make it ideal for installation in control cabinets or tight spaces.
Technical Specifications
| Specification |
Details |
| Manufacturer |
Honeywell |
| Part Number |
621-9939 |
| Module Type |
Serial Link Module (UCN – Universal Control Network) |
| Dimensions |
38 × 267 × 165 mm |
| Weight |
0.7 kg |
| Power Supply |
24V DC nominal |
| Communication Interface |
Serial link compatible with Honeywell DCS and UCN systems |
| Data Transfer |
Reliable point-to-point serial communication |
| Compatibility |
TPS (Total Plant Solution) and other Honeywell DCS architectures |
| Certifications |
CE, RoHS |
| Operating Temperature |
0°C to 60°C |
| Storage Temperature |
-20°C to 70°C |
| Humidity |
5–95% RH, non-condensing |
| Mounting |
DIN rail or panel mount |
Key Features
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Reliable Communication: Maintains stable serial data transmission in harsh industrial environments.
-
Seamless Integration: Designed for direct connectivity with Honeywell TPS and UCN systems.
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Space-Saving Design: Lightweight and compact to fit into dense control cabinets.
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Industrial Robustness: Certified for CE and RoHS compliance, with operational resilience in typical plant conditions.
Applications
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Plant-wide process monitoring and control within Honeywell DCS frameworks
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Integration of field instruments, sensors, and actuators via serial communication
-
Total Plant Solution (TPS) installations requiring reliable serial interfaces
FAQ
Q: Can the 621-9939 module support multiple DCS nodes simultaneously?
A: Yes, it is designed to communicate efficiently with multiple field devices and controllers in TPS and UCN networks.
Q: Is the module compatible with older Honeywell DCS architectures?
A: It is compatible with standard UCN-enabled Honeywell DCS setups. Legacy compatibility may require firmware or configuration adjustments.
Q: What are the mounting options?
A: The module supports DIN rail and panel mounting for flexible installation in control cabinets.
Q: Are there similar modules available for comparison?
A: The Honeywell 621-9938 and 621-9935 provide similar serial interface functionality with slight variations in redundancy and communication protocol support.
