1794-OW8 Allen-Bradley Relay Output Module | Flex I/O Series

1794-OW8 Flex I/O Relay Output Module

Catalog No.: 1794-OW8 | Brand: Allen-Bradley | Series: Flex I/O

This module provides eight isolated Form A (N.O.) electromechanical relays. It handles resistive loads up to 250V AC / 2A and pilot duty R150. The 1794-OW8 offers reliable switching for AC and DC circuits in industrial automation systems.

Technical Specifications

• Outputs: 8 isolated relay (N.O.)
• Relay Contact Rating (AC): 250V AC, 2A, 50/60Hz (resistive)
• Relay Contact Rating (DC): 5…30V DC, 2A (resistive)
• Pilot Duty: R150, 28VA max, 1A below 28V DC
• Off-state Leakage: 1.0mA (via snubber)
• Min. Contact Load: 100 µA @ 100 mV DC
• Initial Contact Resistance: 30 mΩ
• Bounce Time: 1.2 ms (typical)
• Switching Frequency: 1 op/3s (0.3Hz @ rated load)
• Signal Delay: 10 ms (max, both transitions)
• Contact Life: 100,000 operations (min @ rated load)

Electrical & Environmental

• Supply Voltage: 24V DC, 125 mA
• Flexbus Current: 5V DC, 35 mA
• Power Dissipation: 5.5 W (max)
• Thermal Dissipation: 18.8 BTU/hr (max)
• Operating Temperature: 0…55 °C (32…131 °F)
• Storage Temperature: -40…85 °C (-40…185 °F)
• Vibration: 5g @ 10…500 Hz
• Operating Shock: 30g
• Enclosure: Open-type
• Mounting: DIN Rail

Compatibility & Installation

• Terminal Bases: 1794-TB2, -TB3, -TB3S, -TBN, -TBNF, -TB3K, -TBNKF, -TB3SK
• Keyswitch Position: 9
• Fuse (with TBNF): 3.0A, 250VAC slow-blow (Littelfuse 239003)
• Wire Size: Determined by terminal base
• Indicators: 8 yellow status LEDs (one per channel)

Diagnostics & Maintenance

• Status Indicators: Yellow LEDs for each channel – ON = output energized.
• Fault Detection: Module reports open-wire or short-circuit via adapter.
• Maintenance: Easy relay replacement; snap-on terminal bases.
• Diagnostic Data: Read back via FlexBus for predictive maintenance.

Typical Applications

• Motor starters and contactor control
• Valve and actuator switching
• Lighting and indicator circuits
• Small pump and fan control

Why Buy From Oiltech Controls?

• 15+ years in industrial automation spares
• Global shipment via FedEx, UPS, DHL
• Tested surplus / refurbished options available
• 12-month warranty on all modules
• Technical verification before shipment
• Support for obsolete control systems

FAQ

Q: Can I use this with 120V AC loads?
A: Yes, relay contacts are rated 120/240V AC, 1800VA make, 180VA break.

Q: What is the minimum load?
A: 100 µA @ 100 mV DC – suitable for dry contact applications.

Q: Does it support fused outputs?
A: Only when using 1794-TBNF base with a 3.0A slow-blow fuse.

Q: What is the expected relay life?
A: 100,000 operations minimum at rated loads.

Certifications & Compliance

• UL Listed, CSA Certified
• CE Marked for European standards
• RoHS Compliant

Package Contents

• 1794-OW8 Relay Output Module
• Installation instructions (printed)
• Replacement relay guide

Shipping & Warranty

Shipping: FedEx, UPS, DHL – global express delivery.

Warranty: 12 months against defects in material and workmanship.

Contact Information:
Email: info@oiltechcontrols.com
Phone/WhatsApp: +86 158 8020 0923

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