Honeywell 621-9928R Serial Link Selector Module

Product Description

The Honeywell 621-9928R Serial Link Selector Module provides reliable serial communication management for IPC 621 systems. It enables seamless data transfer between controllers and distributed I/O racks, ensuring continuous operation in demanding industrial environments. Moreover, its industrial-grade construction guarantees long-term stability even under high temperature and humidity conditions. Diagnostic LEDs offer real-time monitoring of communication links, allowing quick troubleshooting without disrupting system operations. In addition, the module supports redundant link configurations, enhancing system reliability for mission-critical processes.

Key Features

• Manages serial communication links with high reliability for Honeywell IPC 621 controllers.

• Supports RS-232 and RS-422 protocols for versatile system integration.

• Provides diagnostic LEDs for real-time status monitoring and troubleshooting.

• Enables redundant link support to prevent communication failures.

• Industrial-grade construction tolerates temperatures up to 60°C and high humidity.

• Two 12-position detachable terminal modules simplify wiring and maintenance.

Technical Specifications

• Function: Serial link selection and communication interface

• Supported Protocols: RS-232 / RS-422 (configuration-dependent)

• Data Rate: Up to 19.2 kbps

• Cable Length: Up to 50 ft (15.24 m)

• Connector Type: 25-pin D-sub serial connector

• Power Requirement: +5 VDC from rack

• Current Draw: ~250 mA typical

• Operating Temperature: 0°C to +60°C

• Storage Temperature: -40°C to +85°C

• Humidity Range: 5% to 95% RH, non-condensing

• Dimensions: 4.5 × 1.5 × 10.0 in (11.4 × 3.8 × 25.4 cm)

• Weight: 1.65 lb

Typical Applications

• Process automation in oil & gas, chemical, and power generation industries

• Distributed control systems (DCS) requiring reliable serial communication

• Manufacturing environments with multiple I/O racks

• Redundant communication setups to prevent system downtime

FAQ

Q1: Which protocols does the 621-9928R support?
A1: The module supports RS-232 and RS-422 protocols, depending on your system configuration.

Q2: Can it handle redundant serial links?
A2: Yes, the module is designed to support redundant links, improving reliability.

Q3: What is the maximum cable length supported?
A3: The 621-9928R supports cable runs up to 50 feet (15.24 meters).

Q4: Is this module suitable for harsh industrial environments?
A4: Absolutely. It operates between 0°C to 60°C and tolerates 5–95% non-condensing humidity.