1769-OW8I Allen-Bradley Compact I/O Datasheet & Technical Manual

Allen-Bradley 1769-OW8I Compact I/O Relay Output Module

Allen-Bradley 1769-OW8I Compact I/O Relay Output Module

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Allen-Bradley 1769-OW8I Compact I/O Relay Output Module The Allen-Bradley 1769-OW8I, also cataloged as the 1769-OW8I Digital Relay Output Module, operates...

SKU: 1769-OW8I

Manufacturer: Allen Bradley
Product No.: 1769-OW8I
Product Type: Digital I/O Cards
Product Origin: USA
Payment:T/T, Western Union
Weight: 280g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Allen-Bradley 1769-OW8I Compact I/O Relay Output Module

The Allen-Bradley 1769-OW8I, also cataloged as the 1769-OW8I Digital Relay Output Module, operates as a dedicated hardware component for binary electrical execution and contact closure isolation within CompactLogix and MicroLogix 1500 networks.

Hardware Specifications

Parameter	Specification
Model	1769-OW8I
Brand	Allen-Bradley
Product Type	Digital Relay Output Module
Origin	USA
Weight	0.28 kg
Dimensions	118 mm x 35 mm x 87 mm
Operating Temp	0 to 60 deg C
Storage Temp	-40 to 85 deg C
Power Consumption / Heat Dissipation	2.83 W max
Operating Voltage Range	5-265 VAC / 5-125 VDC
Backplane Current Draw	125 mA @ 5.1 VDC / 100 mA @ 24 VDC
Max Current per Point	2.5 A (Resistive)
Max Current per Module	16 A
Power Supply Distance Rating	8 modules

Industrial Control & I/O Density Scaling

The hardware dictates electromechanical contact switching while enforcing group-to-group galvanic isolation across its 8 normally open points. By segmenting the points into two isolated groups of four, the architecture permits concurrent execution of distinct voltage potentials, including 120 VAC and 24 VDC, without signal degradation. The backplane bus communication velocity is maintained during high-density I/O density scaling routines, while the physical mechanical relays ensure 0 mA off-state leakage current to eliminate false triggering of high-impedance field loads.

Frequently Asked Questions

Q: What are the consequences of exceeding the power supply distance rating for this module?

A: The 1769-OW8I has a strict power supply distance rating of 8 slots. Installing the module further than 8 slots from a valid 1769 power supply will cause excessive voltage drops across the backplane, leading to intermittent logic communication failures or a failure of the internal relays to actuate.

Q: Can this module handle inductive loads like solenoid valves and motor starters directly?

A: Yes, but inductive loads generate transient voltage spikes upon de-energization that can degrade the contacts. To achieve the specified electrical contact life of 100,000 cycles, external surge suppression (RC snubbers for AC loads, flyback diodes for DC loads) must be installed across the field-side inductive devices.

Field Installation Guidelines

Terminate all operational power to the 1769 backplane bus and field-side wiring loops before inserting or removing the hardware assembly.
Slide the module onto the DIN rail and engage the integrated tongue-and-groove bus connectors with the adjacent 1769 module until the locking latches click.
Utilize the Removable Terminal Block (RTB) for field wire termination, ensuring all wire stripping matches the specification limits and no loose strands bridge adjacent terminals.
Separate AC power distribution routing from low-voltage DC logic signaling pathways within the panel enclosure to prevent inductive noise cross-coupling.
Verify that the total continuous current drawn through a single isolated group does not exceed structural thermal boundaries, keeping total module current under 16 A.

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