PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1771-NOC is an isolated Analog Output Module for PLC-5 systems. It provides high-resolution current output control across a range of 0 to 25 mA. The module offers 14-bit output resolution for precise process regulation. It delivers 0.01 percent typical accuracy based on 65,000 count full-scale capability. This precision allows users to control industrial processes with tighter tolerance limits.
The unit dissipates 5.5 Watts of power at 5 Volts direct current. Backplane current draw is 2.9 Amperes at 20 mA or 3.3 Amperes at 25 mA. Each output channel features independently programmable reset values to fit application requirements. The module operates within a temperature range of 0 to 60 degrees Celsius. Output channels update within a maximum execution time of 25 milliseconds.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
|---|
| Category | PLCs |
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| Product Line | PLC 5 |
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| UPC | 612598116690 |
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| Weight | 1.31 lbs (0.60 kg) |
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| Module Type | N-Series Analog I/O Module |
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| Number of Inputs | 0 Inputs |
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| Number of Outputs | 8 Outputs |
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| Output Type | Current |
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| Output Resolution | 0-25 Miliamperes (3.20 Microamperes/bit) |
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| RTP Choice | Unfused, 1771-RTP4; Fused, 1771-RTP3 |
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| Backplane Current | 2.9 A (at 20 mA/ouput); 3.3 A (at 25 mA/output) |
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| Data Format | BDC or Natural Binary |
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| Typical AC Signal Delay (Off) | 45 (+/- 15) ms |
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| Typical DC Signal Delay (Off) | 50 ms |
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| Wiring Arm | 1771-WH |
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| Model Status | Earlier Model |
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TECHNICAL INFORMATION
Features
- Provides eight isolated analog current output channels operating from 0 to 25 mA.
- Offers 14-bit output resolution and 0.01 percent typical full-scale accuracy.
- Supports selectable data formats including Binary Coded Decimal and Natural Binary.
- Includes independently programmable reset values for each individual output channel.
- Provides continuous overvoltage protection rated at 140 Volts AC RMS.
- Features programmable output ramping from 0.16 mA to 32 mA per second.
TECHNICAL INFORMATION
Applications
- Industrial process control loops requiring tight operational tolerances.
- Current loop control architectures requiring 0 to 25 mA outputs.
- Control installations requiring independent channel reset configurations.
TECHNICAL INFORMATION
Connections / Interfaces
- Field wiring connects directly to the Allen-Bradley 1771-WH wiring arm.
- Supports 1771-RTP3 fused remote termination panel connections.
- Supports 1771-RTP4 unfused remote termination panel connections.
- Installs directly into a standard 1771 I/O chassis backplane slot.
TECHNICAL INFORMATION
Installation Guidelines
- Insert the module into any compatible slot within a 1771 I/O chassis.
- Follow standard handling procedures to prevent electrostatic discharge damage.
- Fasten field wiring into the 1771-WH wiring arm before installation.
TECHNICAL INFORMATION
Configuration Guidelines
- Select Natural Binary or Binary Coded Decimal data formats during setup.
- Configure reset values independently for each individual current channel.
- Set channel ramping rates between 0.16 mA and 32 mA per second.
TECHNICAL INFORMATION
Compatibility
- Allen-Bradley PLC-5 1771 I/O chassis.
- Allen-Bradley 1771-WH wiring arm.
- Allen-Bradley 1771-RTP3 fused and 1771-RTP4 unfused remote termination panels.
TECHNICAL INFORMATION
Lifecycle / Replacement Information
- The 1771-NOC is categorized as an earlier model within the PLC-5 family.
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSAllen-Bradley PLC-5 1771 I/O chassis. Allen-Bradley 1771-WH wiring arm. Allen-Bradley 1771-RTP3 fused and 1771-RTP4 unfused remote termination panels.
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 channel count and output range of the 1771-NOC?
The 1771-NOC provides eight isolated current output channels operating from 0 to 25 mA.
Which wiring arm is compatible with the 1771-NOC module?
The module uses the Allen-Bradley 1771-WH wiring arm for all field connections.
What is the maximum update time for the 1771-NOC outputs?
The maximum update time across the output channels is 25 milliseconds.
What is the market reference price for the 1771-NOC?
Observed market reference pricing is approximately 254 USD. This figure is an indicative market reference only and not a final quotation.
