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Allen-Bradley 1771-OW16 Electromechanical Relay Contact Output Module

1. Product Description

The 1771-OW16 is a 16-channel relay output module designed for Allen-Bradley PLC systems (including 1771 I/O chassis). It provides electromechanical relay contacts for switching AC/DC loads, making it ideal for industrial automation applications requiring high-current switching .

2. Key Features

16 Isolated Relay Outputs – Each channel features electromechanical relay contacts (Form A, SPST-NO) for switching AC or DC loads .
Wide Voltage Range – Supports 10–30V DC (resistive load) and 120/240V AC (inductive load) .
High Current Capacity – 0.5A per channel (resistive load), 8A total module current .
Fast Response Time – ≤2ms turn-on delay, ≤4ms turn-off delay for real-time control .
Robust Isolation – 250V AC channel-to-channel isolation and photocoupler input/output isolation for noise immunity .
Industrial Durability – Operates in -40°C to +85°C environments with 5–95% RH (non-condensing) .

3. Technical Specifications

Parameter	Specification
Output Type	Electromechanical Relay (SPST-NO)
Voltage Range	10–30V DC / 120–240V AC
Max Current (per ch.)	0.5A (resistive)
Total Module Current	8A
Isolation Voltage	250V AC (channel-to-channel)
Response Time	≤2ms (ON), ≤4ms (OFF)
Operating Temp.	-40°C to +85°C
Dimensions	177mm × 89mm × 68mm

4. Applications

Motor Control – Switching contactors, solenoids, and small motors .
Lighting Systems – Controlling industrial lighting circuits .
Process Automation – Actuating valves, pumps, and heaters .
Safety Interlocks – Emergency stop circuits and machine guarding .

5. Installation & Precautions

Load Matching – Ensure per-channel current ≤0.5A and total module current ≤8A .
Heat Dissipation – Avoid exceeding 85°C ambient temperature in high-load applications .
Wiring Compliance – Follow NPN/PNP wiring standards to prevent polarity issues .
Compatibility – Verify PLC chassis compatibility (1771-series) before installation .