Honeywell 621-9935 Serial I/O Module 8/16 Point SIOM

Product Overview

Honeywell 621-9935 is a Serial Input/Output Module (SIOM) used in remote serial I/O card files. It interfaces with the Serial Link Module (SLM) and supports 8/16-point configurations for ISSC 600 and related IPC systems.

Technical Specs

• Type: Serial I/O Module (SIOM)
• Point capacity: 8 or 16 points configurable
• Interface: Serial link to 621-9936 / 621-9939 SLM
• Status LEDs: PASS, ACTIVE, RACK FAULT
• Address selection: DIP switches on board
• System: ISSC 600 / IPC serial I/O racks

Key Features

• Controls remote I/O rack communication
• Clear front-panel status indication
• Configurable starting address and fault response
• Proven module for multi-drop serial networks

FAQ

• Function? Serial I/O interface for remote racks.
• Point options? 8 or 16 points.
• LEDs? PASS, ACTIVE, RACK FAULT.

Installation Guide

1. Install in the N slot (full rack) or H slot (half rack).
2. Set DIP switches for address and operating mode.
3. Connect the serial channel cables with proper termination.
4. Power up and verify PASS and ACTIVE LEDs.
5. Confirm communication with the SLM.

Selection Tips

• Required for each remote serial I/O card file.
• Match with the correct SLM model in the processor rack.
• Essential spare for serial I/O networks.