Honeywell 621-9928R Serial Link Selector for Industrial Automation

Product Overview

The Honeywell 621-9928R Serial Link Selector Module is designed for industrial automation systems using redundant Logic Managers. It enables automatic or manual switching between multiple serial communication channels, ensuring fault-tolerant connectivity across PLCs, HMIs, and sensors. Supporting RS-232, RS-422, and RS-485 protocols, this module enhances flexibility and reliability in distributed control environments.

Technical Specifications

Performance and Integration

The 621-9928R supports up to eight serial channels with configurable baud rates and protocol selection. It connects through detachable screw terminals and is controlled by the Redundancy Control Module (RCM), allowing seamless switching between active and standby communication paths.

Design and Reliability

Honeywell engineered the 621-9928R with high-voltage isolation and robust signal integrity. Its modular layout fits IPC card files and supports redundant configurations. The module’s front panel connectors simplify field wiring and diagnostics.

Application

The Honeywell 621-9928R Serial Link Selector Module is ideal for industries requiring reliable serial communication switching, such as process control systems, SCADA, and automated control environments with redundant communication paths for maximum uptime.

FAQ

Q1: Is this product brand new and original?
A1: Yes, we only supply brand new, original 621-9928R modules from Honeywell.

Q2: Do you have stock available?
A2: We have inventory and typically ship within 3 days to 2 weeks depending on order size.

Q3: What shipping methods do you use?
A3: We commonly use DHL, FedEx, UPS, and EMS.

Q4: What if there’s a quality issue?
A4: We support returns within 30 days for any quality-related concerns.