Honeywell 621-9950 Discrete I/O Termination Module
$209.00
$450.00
Description
Overview
The Honeywell 621‑9950 is a high-reliability discrete I/O termination module designed for Honeywell 620/621 Distributed Control Systems (DCS). It provides the physical interface between the controller and field digital devices, ensuring clean signal routing, stable voltage handling, and protection against electrical surges. The module supports 16 individual channels, handles 11–28 VDC digital signals, and offers up to 2 A of drive capability per channel.
This module is widely used in industrial environments for applications such as pumps, relays, motors, valves, and solenoids, ensuring stable system operation, electrical isolation, and high noise immunity.
Technical Specifications
Electrical Specifications
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Channels: 16 discrete I/O termination points
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Voltage Range: 11–28 VDC
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Output Current: 2 A per channel
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Surge Current: 5 A for 10 ms (non-repetitive)
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Off-State Leakage: ~5 mA (typical)
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On-State Voltage Drop: ~2 VDC at 2 A
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Required Terminal Block: Honeywell 621‑9949
Mechanical Specifications
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Dimensions (Packaged): 28.5″ × 25.5″ × 22.5″
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Weight: 1 lbs
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Mounting: Fits Honeywell 620/621 DCS racks
Key Features
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16-channel discrete I/O interface, supports stable digital signal transmission
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Compatible with 11–28 VDC signals
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Provides 2 A per channel for driving high-power loads
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Surge-tolerant design ensures industrial-grade reliability
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Compatible with Honeywell 620/621 DCS systems
Applications
Ideal for use in industrial automation systems such as:
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Pump station control and monitoring
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Relay and solenoid valve driving
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Motor and mechanical device digital signal collection
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Field interface termination for process control systems
FAQ
Q1: Does this module support repetitive surges?
A1: The module is designed to handle a non-repetitive surge of 5 A / 10 ms. Continuous surge usage should be within design specifications.
Q2: Can it operate below 10 VDC?
A2: It is recommended to keep the voltage within the 11–28 VDC range for optimal performance.
Q3: Is this module compatible with controllers other than Honeywell 620/621 series?
A3: The module is specifically designed for the Honeywell 620/621 DCS systems and has not been verified for third-party controller compatibility.
Features
Minimum Order Quantity (MOQ)
We welcome bulk orders and have a minimum order quantity of just one unit.
Certificates and Documentation
Upon request, we can provide all necessary documentation, including Certificates of Origin/Conformance and other required export documents.
Delivery Time
For items in stock, we aim to deliver within 1-3 days after payment confirmation. Items with specified lead times will be delivered according to the quoted schedule.
Payment Methods
We accept 100% T/T (Telegraphic Transfer) payment before shipping. For items with lead times, a 30% deposit is required upfront, with the remaining 70% due before shipment. For RMB transfers, please contact us if you have an agent in China.
Warranty
We offer a standard one-year warranty on all new and original items. If you require an extended warranty, please contact us for additional cost details.
Refund and Return Policy
Your satisfaction is important to us. If you need to return an item, it must be done within 30 days of the order date. The product must be unused, unopened, and in its original packaging with all accessories included. Refunds are processed within 5-7 business days after we receive the returned item. Please note that shipping and related charges are non-refundable.
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