Allen-Bradley 1771-OD16 PLC-5 Digital AC Output Module Conformal Coated

Product Overview

The Allen-Bradley 1771-OD16 serves as a high-density digital AC output interface within the 1771 I/O platform. This module provides 16 independent outputs designed to drive 120V AC field loads such as motor starters, solenoids, and indicators. It features specialized conformal coating to protect internal circuitry against moisture, dust, and chemical contaminants. We supply this unit in 100% Brand New condition, ensuring peak switching performance and long-term hardware availability for your critical PLC-5 infrastructure.

Technical Specifications

• Module Type: Digital AC Output Module

• Number of Outputs: 16 Points

• Voltage Category: 120V AC

• Operating Voltage Range: 74–138V AC

• Max Continuous Current Per Output: 2 Amperes

• Max Total Current Per Module: 8 Amperes

• Backplane Current: 200 mA

• Typical Signal Delay (Off): 45 (+/- 15) ms

• Data Format: BCD or Natural Binary

• Protection: Conformal Coating

• Wiring Arm: 1771-WH

• Weight: 1.38 lbs (0.62 kg)

Engineering Advantages

The 1771-OD16 optimizes power distribution and system protection through its robust electrical design:

• High-Amperage Driving Capacity: Each output handles up to 2 Amperes of continuous current. This eliminates the need for interposing relays when controlling larger AC solenoids or contactors, significantly reducing panel complexity and hardware costs.

• Environmental Shielding via Conformal Coating: The factory-applied conformal coat creates a protective barrier over the PCB. This shield prevents dendrite growth and corrosion in humid or corrosive environments, making it the standard choice for wastewater treatment, paper mills, and chemical processing plants.

• Deterministic Load Control: The module supports both BCD and Natural Binary data formats, allowing for precise logic synchronization with the PLC-5 processor. This ensures consistent switching cycles for time-sensitive industrial processes.

• Simplified Serviceability: Compatibility with the 1771-WH wiring arm allows for rapid module replacement. Technicians swap hardware without disconnecting individual field wires, which prevents wiring errors and minimizes production downtime during maintenance.

FAQs

• What is the benefit of the conformal coating on this module?

  The conformal coating protects the 1771-OD16 from environmental stressors like humidity, salt spray, and airborne contaminants. This treatment drastically improves the module's MTBF (Mean Time Between Failures) in harsh industrial settings compared to non-coated versions.

• Can I drive 16 loads at 2 Amps each simultaneously?

  No. While each individual output supports up to 2 Amps, the total module current must not exceed 8 Amperes. You must calculate your total load requirements to ensure you stay within the 8A aggregate limit to prevent thermal damage.

• Is this a Brand New original Allen-Bradley part?

  Yes. We guarantee this 1771-OD16 is 100% Brand New in its original condition. For legacy PLC-5 systems, using new hardware ensures the output triacs and protective coatings haven't degraded due to age or prior thermal cycling.

• Which wiring arm is compatible with the 1771-OD16?

  This module requires the 1771-WH wiring arm. The arm mounts to the chassis and connects the field-side 120V AC power and load wires to the module's interface pins.