1771-OAD Allen-Bradley PLC-5 Digital Output Module

Product Parameters

Basic Information:

Manufacturer: Allen-Bradley (Rockwell Automation)

Model: 1771-OAD (Series B, C, etc.)

Type: Digital Output Module

Compatible Systems: PLC-5 series, installed in 1771 I/O chassis

Installation: Can be installed in any slot except those reserved for processors or adapters, compatible with 1771-A1B, A2B, A3B, A3B1, A4B, AM1, AM2 chassis (not compatible with 1771-A1, A2, A4)

Electrical Parameters:

Output Channels: 16 output points

Output Voltage Range:

10–138V AC (47–63 Hz)

10–138V DC

Output Current:

Maximum per output: 2 A

Maximum per module: 8 A

Minimum load current: 50 mA

Surge current: 4 A per output for 10 ms (repeatable every 2 seconds)

Backplane Current: 900 mA @ 5V DC

Power Dissipation:

Maximum: 15.6 W

Minimum: 1.5 W

Thermal Dissipation:

Maximum: 53.3 BTU/hour

Minimum: 5.1 BTU/hour

On-State Voltage Drop:

1.5V @ 2 A (AC)

2.5V @ 2 A (DC)

Signal Delay:

AC On: 1 ms or 8.3 ms @ 60 Hz

AC Off: 8.3 ms or 25 ms @ 60 Hz

DC On/Off: 1 ms

Operating Temperature: 0°C to 60°C (32°F to 140°F)

Storage Temperature: -40°C to 85°C (-40°F to 185°F)

Relative Humidity: 5% to 95% (non-condensing)

Connection and Wiring:

Wiring Arm: 1771-WH (removable terminal block, supports Removal and Insertion Under Power—RIUP)

Keying Positions: 6-8 or 26-28 (prevents incorrect installation)

Power Requirements: Powered through the 1771 I/O chassis backplane;     ensure total current draw of all modules does not exceed chassis power supply capacity

Fusing:

Outputs are individually fused with 3 A, 250V slow-blow fuses (Bussmann MDL 3 or equivalent)

Fuse blown indicator on the front panel

Other:

Indicators:

1 green module status LED

16 red output status LEDs (light up when output is energized)

1 red fuse blown indicator

Certifications: c-UL, CSA, CE

Addressing: Supports 1/2 slot, 1 slot, and 2 slot I/O addressing

Isolation: Optically isolated outputs for protection against electrical transients

Functions

Discrete Output Control:

Provides 16 output channels for controlling AC or DC devices such as solenoids, relays, motor starters, or indicator lights.

Supports both 120V AC and DC signals, offering flexibility for mixed-signal environments.

High Current Capability:

Each output supports up to 2 A, with a module maximum of 8 A, suitable for driving high-power devices.

Handles surge currents up to 4 A per output for short durations, ideal for inductive loads like motors or solenoids.

Individual Fusing:

Each output is protected by a 3 A slow-blow fuse, with a front-panel indicator for blown fuses, simplifying troubleshooting.

Fuses protect the module and connected devices from overcurrent conditions.

Modular Design:

The 1771-WH wiring arm allows module replacement without disconnecting wiring, reducing downtime.

Supports RIUP for maintenance in live systems.

Status Monitoring:

Equipped with 16 red output status LEDs and 1 green module status LED for real-time monitoring of output states and module health.

Output states are transmitted to the PLC processor via the backplane for program control.

System Integration:

Compatible with ControlNet, Remote I/O, and Extended Local I/O networks, supporting distributed control architectures.

Can be paired with 1771 input modules (e.g., 1771-IAD, 1771-IBD) for complete I/O solutions.

Reliability and Protection:

Optical isolation protects against electrical noise and transients, ensuring reliable operation in harsh industrial environments.

Fast signal response (1 ms for DC, up to 8.3 ms for AC) supports time-critical applications.

Application Scenarios

Industrial Automation:

Controls discrete devices like solenoids, relays, motor starters, or indicator lights in automated production lines, such as automotive manufacturing, packaging systems, or material handling.

Suitable for applications requiring both AC and DC outputs, such as mixed-signal control systems.

Distributed Control Systems:

Used in large-scale facilities to control remote devices via Remote I/O or ControlNet networks, integrating with central PLC-5 controllers.

Common in industries like energy, chemical processing, or water treatment for actuating valves, pumps, or alarms.

Legacy System Maintenance:

Supports existing PLC-5 systems in facilities with 1771 I/O chassis, ensuring compatibility with older infrastructure.

Acts as a transitional module for upgrading to modern platforms like ControlLogix while maintaining output functionality.

High-Power Device Control:Ideal for driving high-current loads (up to 2 A per output) in applications like motor control, conveyor systems, or heavy machinery operation.

Advantage Products:

All items are Distributor Ready-stock Genuine Brand-new Supplying, please inform us if the other conditions are needed, Used, Open-box, Refurbished, etc.

Many Available just wait for you, feel free to ask to get better deal!!!

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