PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1771-ID is a digital input module designed for PLC-5 systems. It provides six individually isolated input channels. The module supports dual-rated operation on 120V AC or 120V DC circuits. Channel isolation allows each input to operate at different voltage levels independently. It installs into a single slot of any 1771 I/O chassis.
Each channel operates within an input voltage range of 92 to 138V AC or DC. The module features hardware filtering that limits transients and contact bounce. Opto-electrical isolation is rated at 1500V AC RMS. Field wiring terminates at an Allen-Bradley 1771-WD field wiring arm. The backplane current requirement is 74 mA.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
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| Category | PLCs |
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| Product Line | PLC 5 |
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| UPC | 662468205511 |
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| Weight | 1.00 lbs (0.45 kg) |
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| Module Type | Individually isolated discrete output module |
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| No. of Inputs | Six (6) inputs |
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| Operating Voltage Range | 92 - 138VAC / 92-138 VDC |
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| AC input Frequency | 47-63 Hz |
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| Nominal input current | 8mA @ 120V ac; 8mA @ 120V dc |
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| Input Signal Delay | 24+10ms, on or off for ac; 10+4ms for turning on dc; 20+9ms for turning off dc |
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| Power Dissipation | 0.4-4.4 Watts |
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| Thermal Dissipation | 1.3 BTU/hr-15.0 BTU/hr |
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| Compatible chassis | 1771 I/O chassis |
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| Keying | Between 4 and 6; Between 28 and 30 |
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| Field Wiring Arm | Cat. No. 1771-WD |
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| Wiring Arm Screw Torque | 7-9 inch-pounds |
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| Number of Inputs | 6 Inputs |
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| Voltage Category | 120 Volts AC/DC |
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| AC Operating Voltage | 92-138 Volts |
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| DC Operating Voltage | 92-138 Volts |
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| Backplane Current | 74 Miliamperes |
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| Max AC Off-State Current | 1.7 Miliamperes |
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| Max DC Off-State Current | 1.7 Miliamperes |
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| Typical AC Signal Delay (On) | 24 (+/- 10) ms |
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| Typical DC Signal Delay (On) | 10 (+/- 4) ms |
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| Typical AC Signal Delay (Off) | 24 (+/- 10) ms |
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| Typical DC Signal Delay (Off) | 20 (+/- 9) ms |
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TECHNICAL INFORMATION
Features
- Six individually isolated digital input channels.
- Dual-rated operation for 120V AC and 120V DC voltage inputs.
- Opto-electrical isolation rated at 1500V AC RMS.
- Hardware input filtering to limit electrical noise and contact bounce.
- Removable 1771-WD field wiring arm for quick module replacement.
- Occupies a single slot in any 1771 I/O chassis.
TECHNICAL INFORMATION
Applications
- Isolated-circuit multi-phase sensing applications.
- Liquid level monitoring with float switches.
- Machinery travel detection using limit switches.
- Operator input monitoring via pushbuttons and selector switches.
TECHNICAL INFORMATION
Connections / Interfaces
- Field connections terminate directly on the 1771-WD wiring arm.
- Accommodates 14 AWG solid or stranded copper wire with 3/64-inch maximum insulation.
- Connects to system backplane via standard 1771 chassis slot connectors.
TECHNICAL INFORMATION
Installation Guidelines
- Mount the module into a single slot in any 1771 I/O chassis.
- Set chassis keying bands between pins 4 and 6, and pins 28 and 30.
- Tighten field wiring arm terminal screws to 7 to 9 inch-pounds.
- Calculate total chassis backplane current including the 74 mA requirement.
TECHNICAL INFORMATION
Configuration Guidelines
- Confirm input device voltages remain within 92 to 138V AC or DC.
- Configure input logic while factoring in hardware signal delay transitions.
TECHNICAL INFORMATION
Compatibility
- Allen-Bradley 1771 I/O chassis.
- Allen-Bradley 1771-WD field wiring arm.
TECHNICAL INFORMATION
Lifecycle / Replacement Information
- The 1771-WD wiring arm detaches without disturbing field wire terminations.
- Replacement modules require matching keying bands prior to chassis insertion.
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSAllen-Bradley 1771 I/O chassis. Allen-Bradley 1771-WD field wiring arm.
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 1771-ID module?
The 1771-ID operates from 92 to 138V AC (47 to 63 Hz) or 92 to 138V DC.
Can input channels on the 1771-ID use different voltages?
Yes. Individual channel isolation allows each channel to operate at different voltage levels up to 1500V AC RMS.
Which field wiring arm is required for the 1771-ID?
The module uses the catalog number 1771-WD field wiring arm for all field connections.
What chassis keying is required for the 1771-ID?
Insert keying bands between pins 4 and 6, and between pins 28 and 30.
What is the reference price for the Allen-Bradley 1771-ID?
Market reference pricing is approximately $59.00 USD. This is an indicative market reference price only, not a final quotation.
