PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1771-OBD is a PLC-5 digital output module designed for sourcing DC loads. This sixteen-channel non-isolated output unit operates across a voltage range of 10 to 60 Volts DC. The nominal operating voltage is rated at 48 Volts DC for standard industrial automation equipment. It supplies continuous control power to solenoids, pilot lamps, and relay coils in industrial processes.
Each channel delivers a continuous current rating of 2 Amperes resistive and 0.2 Amperes pilot duty. The maximum total continuous current rating across the entire module is 8 Amperes. Backplane current draw requires 400 milliamperes at 5 Volts DC within compatible 1771 chassis racks. The module provides conformal coating protection and supports natural binary or binary-coded decimal data formats.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
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| Category | PLCs |
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| GTIN | 10612598128485 |
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| Weight | 0.94 lbs (0.43 kg) |
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| Module Type | Discrete output module |
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| No. of outputs | Sixteen (16) outputs |
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| Operating Voltage Range | 10-60VDC |
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| Nominal output voltage | 48 VDC |
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| Output current rating per channel | 2 A per output resistive, not to exceed 8 A per module; 0.2 A per output pilot duty |
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| Maximum Surge current | 4 A per output for 10 ms, repeatable every 2 s; 25 A per output for 10 ms, repeatable every 2 s |
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| Minimum load current | 2.5 mA |
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| Power Dissipation | 15.6 Watts |
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| Thermal Dissipation | 53.3 BTU/hr |
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| Compatible chassis | 1771 I/O chassis |
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| Keying | Between 10 and 12; Between 22 and 24 |
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| Field Wiring Arm | 1771-WH; 1771-WHF; 1771-WHFB |
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| Wiring Arm Screw Torque | 7-9 inch-pounds |
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| Number of Outputs | 16 Outputs |
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| Voltage Category | 10 to 60 Volts DC, Source |
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| DC Operating Voltage | 10 to 60 Volts |
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| Backplane Current | 400 Miliamps |
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| Max Continuous Current Per Output | 2 Amps |
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| Max Continuous Current Per Module | 8 Amps |
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| Wiring Arm | 1771-WH |
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| Coating | Conformal Coat |
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| Data Format | BDC or Natural Binary |
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| Typical AC Signal Delay (Off) | 45 (+/- 15) milliseconds |
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| Typical DC Signal Delay (Off) | 50 milliseconds |
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| Mounting | Rack Mountable |
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| UPC | 10612598128485 |
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TECHNICAL INFORMATION
Features
- Provides sixteen non-isolated sourcing DC outputs rated for 10 to 60 Volts DC operation.
- Supports a continuous current rating of 2 Amps per channel and 8 Amps per module.
- Features a maximum on-state voltage drop of 1.5 Volts DC during operation.
- Offers conformal coating to protect internal electronic circuits against industrial environment contamination.
- Provides plastic keying bands positioned between pins 10 and 12, plus 22 and 24.
TECHNICAL INFORMATION
Applications
- Energizing industrial 24V or 48V DC pilot indicator lights on operator control panels.
- Actuating direct current pneumatic solenoid valves in automated machinery.
- Switching interposing relay coils in PLC-5 industrial control architectures.
TECHNICAL INFORMATION
Connections / Interfaces
- Field wiring terminates at the 1771-WH, 1771-WHF, or 1771-WHFB field wiring arm.
- Supports solid or stranded copper wire sized from 0.34 to 2.5 mm2 (22 to 14 AWG).
TECHNICAL INFORMATION
Installation Guidelines
- Mount the module into any compatible 1771 I/O chassis slot.
- Do not install the unit into a 1771-A4 chassis.
- Insert keying bands between backplane connector pins 10-12 and 22-24.
- Tighten wiring arm terminal screws to between 7 and 9 inch-pounds.
- Disconnect field power before removing or inserting the wiring arm or module.
TECHNICAL INFORMATION
Configuration Guidelines
- Select BCD or natural binary data formatting in controller program logic.
TECHNICAL INFORMATION
Compatibility
- Compatible with Allen-Bradley 1771-A1B through 1771-A4B I/O chassis assemblies.
- Interfaces with 1771-WH, 1771-WHF, and 1771-WHFB field wiring arms.
- Not compatible for mounting in standard 1771-A4 I/O chassis.
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSCompatible with Allen-Bradley 1771-A1B through 1771-A4B I/O chassis assemblies. Interfaces with 1771-WH, 1771-WHF, and 1771-WHFB field wiring arms. Not compatible for mounting in standard 1771-A4 I/O chassis.
Verify compatibility against the exact Part Number, revision and manufacturer documentation before ordering.
PART VERIFICATION
Before You Order
Industrial automation parts can share similar model names, suffixes and revisions. Confirm the complete manufacturer Part Number before purchase.
01Check Part NumberMatch the complete ordering code on the existing unit.
02Confirm RevisionCheck suffix, hardware or firmware when applicable.
03Send a Label PhotoWe can review a clear label photo when identification is uncertain.
ORDERING PROCESS
From RFQ to Dispatch
1Submit Part Number2Verify Product Identity3Confirm Stock & Condition4Issue Quotation5Dispatch & Tracking
PRODUCT FAQ
Frequently Asked Questions
What is the operating voltage range of the Allen-Bradley 1771-OBD?
The 1771-OBD operates from 10 to 60 Volts DC with a nominal rating of 48 Volts DC.
Which field wiring arms work with the 1771-OBD module?
The module is compatible with 1771-WH, 1771-WHF, and 1771-WHFB field wiring arms.
What is the reference price for a 1771-OBD module?
Verified market observations show reference pricing around 93 USD. Figures represent indicative market reference pricing only and are not a final quotation.
