Honeywell 621-9940C Serial I/O Module Board

Description

 The Honeywell 621-9940C is a high-performance Serial I/O Module (SIOM) designed for seamless integration with Honeywell’s TPS and PlantScape distributed control systems. It enables reliable serial communication between controllers and field devices in industrial automation environments.

Specifications

• Model: 621-9940C

• Type: Serial I/O Module

• Supported Protocols: RS-232, RS-485

• Mounting Slot: Slot N (full-size rack) or Slot H (half rack)

• Module Density Options: 0, 8, 16, or 32 points per slot

• Terminating Resistors: Required for each serial channel; two for last SIOM in multidrop setups

• DIP Switches: Four 8-position banks + one 4-position bank for address, fault response, and mode settings

• Dimensions: 264 × 32 × 127 mm

• Weight: 0.61 kg

• Origin: USA

• Condition: New or surplus stock

• Warranty: 12 months

Features

• Multi-Protocol Support: Compatible with RS-232 and RS-485 for flexible field device integration

• Hot-Swappable: Enables replacement without system shutdown, minimizing downtime

• Real-Time Data Transfer: Ensures fast and reliable communication for process control

• Point-to-Point and Multidrop: Configurable for various network topologies

• LED Diagnostics: Provides immediate feedback for fault detection and troubleshooting

• Compact Design: Optimized for Honeywell I/O racks, conserving panel space

• Industrial Durability: Engineered for harsh environments with high reliability

• System Compatibility: Fully integrates with Honeywell TPS and PlantScape platforms