Honeywell 621‑9938 Serial I/O Module

Description

The Honeywell 621‑9938 Serial I/O Module enables serial communication between controllers and field devices, providing reliable data exchange in Honeywell TDC 3000 and Experion PKS systems.

Specifications

• Manufacturer: Honeywell
• Model Number: 621‑9938
• Product Type: Serial I/O Module
• System Compatibility: Honeywell TDC 3000 / Experion PKS
• Communication Protocols: RS‑232 / RS‑485 supported
• Baud Rate: Configurable up to 115.2 kbps
• Input Voltage: 24 VDC supplied from rack power
• Mounting: Rack‑mounted installation
• Operating Temperature: –20 °C to +70 °C
• Weight: ~1.3 kg

Features

• Flexible Connectivity: Supports RS‑232 and RS‑485 serial interfaces
• Reliable Data Transfer: Ensures stable communication with field devices
• Configurable Baud Rate: Adjustable for diverse industrial applications
• Industrial Durability: Designed for continuous duty in harsh environments
• Seamless Integration: Compatible with Honeywell TDC 3000 and Experion PKS systems
• Hot‑Swappable: Allows quick replacement without system downtime