Description
Product Description
The Honeywell 621-9935 Serial I/O Module provides robust serial communication for IPC 620 and 621 systems. It enables reliable data exchange between controllers, operator stations, engineering workstations, and third-party devices. Designed for industrial-grade applications, it supports redundancy and fault-tolerant operation when paired with Serial Link Selector Modules.
Technical Specifications
| Specification |
Details |
| Supported Protocols |
RS-232, RS-422 |
| Number of Channels |
2–4 serial ports |
| Baud Rate |
300 bps – 115.2 kbps |
| Isolation |
Optical isolation on all channels |
| Error Detection |
Parity check, CRC verification |
| Status Indicators |
LEDs for link activity, communication status, and faults |
| Power Supply |
5 VDC from backplane |
| Dimensions |
130 × 35 × 110 mm |
| Weight |
1.39 lbs |
| Operating Temperature |
0°C to +60°C |
| Storage Temperature |
–40°C to +85°C |
| Mounting |
Rack-mounted modular slot |
Key Features
-
Provides RS-232 and RS-422 serial communication for controllers and external devices.
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Supports redundancy when paired with Serial Link Selector Modules (e.g., 621-9928R).
-
LED diagnostics for real-time monitoring of communication and fault status.
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Rugged construction with optical isolation for EMI resistance.
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Flexible configuration across multiple baud rates and protocols.
Applications
The 621-9935 is widely used in oil & gas, chemical, and power generation industries. It ensures reliable communication between control modules and external systems in distributed control environments, supporting continuous operation under harsh conditions.
FAQ
Q: Can this module support multiple serial protocols simultaneously?
A: Yes, it supports RS-232 and RS-422 on separate channels.
Q: Is the module compatible with redundancy systems?
A: Yes, it can be paired with Serial Link Selector Modules for fault-tolerant operation.
Q: What operating environments are suitable?
A: It is designed for industrial environments with operating temperatures from 0°C to 60°C and storage temperatures down to –40°C.
Q: How does it integrate with operator stations and engineering workstations?
A: It provides dedicated serial communication links for seamless data exchange without additional converters.
