Honeywell
Honeywell 621-9938R Redundant Serial I/O Module SIOM
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Manufacturer: Honeywell
Product No.: 621-9938R
Product Type: Serial I/O Module
Product Origin: USA
Payment: T/T
Weight: 1600g
Shipping port: Xiamen
Warranty: 12 months
Yes, we provide a 30-day money-back guarantee for all purchases.
Yes, all items come with a 12-month warranty from the date of shipment.
Product Overview
The Honeywell 621-9938R is a redundant Serial I/O Module (SIOM) used in remote serial I/O card files. It controls the serial I/O card file and interfaces with the 621-9939 Serial Link Module (SLM) in the processor card file, supporting dual-port redundant serial configurations.
Key Specs
- Type: Serial I/O Module (SIOM) – redundant version
- Ports: Dual communication ports for redundant serial links
- I/O capacity: Supports 8 / 16 / 32-point configurations
- Interface: Connects to 621-9939 SLM
- System: Honeywell IPC / ISSC 600 and related platforms
- Configuration: DIP-switch selectable address and options
Why Choose This
- Supports redundant serial I/O architectures
- Dual ports for high-availability communication
- Configurable for different point densities
- Proven module for legacy Honeywell serial I/O systems
Common Questions
- Redundant? Yes – dual-port design.
- Pairs with? 621-9939 Serial Link Module.
- Point options? 8, 16 or 32 points.
Mounting Steps
- Install the module in slot N of the remote serial I/O card file.
- Set DIP switches for starting address and I/O configuration.
- Connect the dual serial links and install terminating resistors at the ends of the network.
- Power up and verify communication with the SLM.
- Confirm I/O point mapping in the control system.
Buying Advice
- Required for redundant serial I/O card files.
- Ensure matching terminating resistors are installed.
- Critical spare for dual-redundant serial I/O systems.