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Model: 9967295 (General Model: 621-9967)

Brand: Honeywell

Series: 620 System / 621 Series I/O Card

Type: 16-channel Digital Output Module (DO) Relay Output Type

I. Basic Overview

9967295 is a standard 16-channel relay digital output card in the 620/621 series DCS of Honeywell, used to control external electromagnets, indicator lights, contactors, alarm devices, etc., providing dry contact / relay isolation output. It is widely used in power plants, chemical plants, petrochemical plants, etc., for industrial process interlock and control circuits.

II. Core Specification Parameters

Channel Number: 16 independent relays outputs

Contact Type: SPDT (Single-Pole Double-Throw) Relay

Contact Capacity:

240 VAC / 30 VDC: 5A (resistive load)

Maximum Switching Power: 1250 VA / 150 W

Isolation: Channel - Backplane Full Electrical Isolation (2500 Vrms)

Power Supply: 24 V DC Backplane Power Supply

Power Consumption: < 8 W

Installation: Standard 19-inch Rack, Supports Hot Swap

Status Indicators: Independent LED (ON), PWR, FAULT Indicator Lights per Channel

Operating Temperature: -40°C ~ +70°C

Humidity: 5% ~ 95% RH (No Condensation)

MTBF: > 1,000,000 Hours

Certifications: UL, CE, CSA, Class I Div 2 Explosion-proof (Optional)

III. Functional Features

16-channel Independent Relays Output

Each Channel Independent SPDT Relay, No Shared Common Terminal

Supports Normally Open (NO) / Normally Closed (NC) Flexible Wiring

Channel-to-Channel Complete Isolation to Prevent Crosstalk and Short Circuit Spread

Industrial-grade Reliability

Silver Alloy Contacts, Low Contact Resistance, Long Life

Mechanical Life: > 1×10⁷ Times; Electrical Life: > 2×10⁷ Times

Strong Anti-interference (Compliant with EN 61000-6-2/4 EMC Standards)

Full Metal Shielding, Suitable for Harsh Industrial Environments

Installation and Maintenance

Each Channel LED Real-time Displays Output Status

Plug-in While Powered, Online Replacement Does Not Affect System

Can Be Mixed with 621-9937 (DI), 621-9939 (AI), 623-5020 (CPU) on the Same Rack

IV. Typical Applications

Equipment Start/Stop Control (Pumps, Fans, Valves)

Alarm and Fault Indication Circuits

Safety Interlock System (ESD)

Electromagnetic Valve Drive

Indicator Lights, Alarmers, Relay Coil Control

V. Model Comparison

9967295: General Material Number

621-9967: Standard Model (621 Series DO Card)

621-9967R: Redundant Type

621-9968: 8-channel Relay Output (Simplified Version)