1771-ID16  | Allen-Bradley PLC-5 Digital Input, 120V AC/DC, 16 Input, Isolated
1771-ID16  | Allen-Bradley PLC-5 Digital Input, 120V AC/DC, 16 Input, Isolated
1771-ID16  | Allen-Bradley PLC-5 Digital Input, 120V AC/DC, 16 Input, Isolated
1771-ID16  | Allen-Bradley PLC-5 Digital Input, 120V AC/DC, 16 Input, Isolated
1771-ID16  | Allen-Bradley PLC-5 Digital Input, 120V AC/DC, 16 Input, Isolated
1771-ID16  | Allen-Bradley PLC-5 Digital Input, 120V AC/DC, 16 Input, Isolated
1771-ID16  | Allen-Bradley PLC-5 Digital Input, 120V AC/DC, 16 Input, Isolated
1771-ID16  | Allen-Bradley PLC-5 Digital Input, 120V AC/DC, 16 Input, Isolated
1771-ID16  | Allen-Bradley PLC-5 Digital Input, 120V AC/DC, 16 Input, Isolated
1771-ID16  | Allen-Bradley PLC-5 Digital Input, 120V AC/DC, 16 Input, Isolated
1771-ID16  | Allen-Bradley PLC-5 Digital Input, 120V AC/DC, 16 Input, Isolated
1771-ID16  | Allen-Bradley PLC-5 Digital Input, 120V AC/DC, 16 Input, Isolated
1771-ID16  | Allen-Bradley PLC-5 Digital Input, 120V AC/DC, 16 Input, Isolated
1771-ID16  | Allen-Bradley PLC-5 Digital Input, 120V AC/DC, 16 Input, Isolated
1771-ID16  | Allen-Bradley PLC-5 Digital Input, 120V AC/DC, 16 Input, Isolated
    1771-ID16  | Allen-Bradley PLC-5 Digital Input, 120V AC/DC, 16 Input, Isolated
    1771-ID16  | Allen-Bradley PLC-5 Digital Input, 120V AC/DC, 16 Input, Isolated
    1771-ID16  | Allen-Bradley PLC-5 Digital Input, 120V AC/DC, 16 Input, Isolated
    1771-ID16  | Allen-Bradley PLC-5 Digital Input, 120V AC/DC, 16 Input, Isolated
    1771-ID16  | Allen-Bradley PLC-5 Digital Input, 120V AC/DC, 16 Input, Isolated
1771-ID16  | Allen-Bradley PLC-5 Digital Input, 120V AC/DC, 16 Input, Isolated
1771-ID16  | Allen-Bradley PLC-5 Digital Input, 120V AC/DC, 16 Input, Isolated
1771-ID16  | Allen-Bradley PLC-5 Digital Input, 120V AC/DC, 16 Input, Isolated
1771-ID16  | Allen-Bradley PLC-5 Digital Input, 120V AC/DC, 16 Input, Isolated
1771-ID16  | Allen-Bradley PLC-5 Digital Input, 120V AC/DC, 16 Input, Isolated

1771-ID16 | Allen-Bradley PLC-5 Digital Input, 120V AC/DC, 16 Input, Isolated

Part #: 1771-ID16 Manufactured by: Allen-Bradley
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$177.65
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Product Overview
The Allen-Bradley 1771-ID16 is a PLC-5 Digital Input module featuring 16 isolated input channels compatible with 120V AC/D...  Read more
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Product Description P/N: 1771-ID16

Description / Specifications

Description
The Allen-Bradley 1771-ID16 is a digital input module for PLC-5 systems. It provides 16 isolated input channels for 120V AC/DC signals, designed to connect ON/OFF field devices to the controller. This module is commonly applied in industrial automation, machine control, and process applications requiring reliable digital signal acquisition.

 

 

Technical Specifications 

Manufacturer Rockwell Automation
Brand Allen-Bradley
Part Number/Catalog No. 1771-ID16
Module Type Digital AC/DC Input Module
Number of Inputs 16 Inputs
Voltage Category 120 Volts AC/DC
AC Operating Voltage 77-138 Volts
DC Operating Voltage 105-138 Volts
Backplane Current 75 Miliamperes
Max AC Off-State Current 4.0 Miliamperes
Max DC Off-State Current 1.8 Miliamperes
Typical AC Signal Delay (On) 1 ms
Typical DC Signal Delay (On) 1 ms
Typical AC Signal Delay (Off) 9 or 18 ms
Typical DC Signal Delay (Off) 9 ms
Wiring Arm 1771-WN
Dimensions 3.5 x 6.5 x 2.0 in (89 x 165 x 51 mm)
Series PLC 5

  

 

Information About 1771-ID16

The 1771-ID16 belongs to the Allen-Bradley 1771 Universal I/O family, developed to interface discrete devices with PLC-5 processors. It supports 16 individually isolated inputs at 120V AC/DC and is designed with input filtering to suppress noise and voltage transients caused by contact bounce. The module has a factory-set filter time of 9 ms, with typical delays of 9–18 ms for AC on/off transitions and 0.57 ms for DC switching. It installs in a 1771 I/O chassis such as the 1771-A1B or 1771-A4B and uses the 1771-WN wiring arm for secure field connections. Built for isolated multi-phase applications, the 1771-ID16 is suitable for interfacing with limit switches, float switches, selector switches, and pushbuttons. Its modular design allows hot-swapping (removal and insertion under power) without rewiring, making it practical for demanding industrial environments.

Key Features:

  • Design: 16-channel digital input module with isolated 120V AC/DC inputs.
  • Input Filtering: Customer-selectable filters suppress noise and voltage transients, improving reliability.
  • Performance: Factory-set filter time of 9 ms with 9–18 ms AC delay and 0.57 ms DC delay.
  • Compatibility: Operates with PLC-5 controllers in 1771 I/O chassis (e.g., 1771-A1B, 1771-A4B).
  • Connectivity: Uses 1771-WN wiring arm for quick connections and easy module replacement.
  • Durability: Designed for long service life with support for millions of switching operations.
  • Application Range: Interfaces with ON/OFF devices such as pushbuttons, limit switches, pilot lights, annunciators, and motor starters.
  • Ease of Maintenance: Supports removal and insertion under power (RIUP) without disconnecting field wiring.

The 1771-ID16 delivers the robustness and reliability required for industrial digital input applications in PLC-5 automation systems.

 

Manufacturer information

Allen-Bradley, a brand of Rockwell Automation, specializes in manufacturing industrial automation equipment. The product range includes programmable logic controllers (PLCs), motion control systems, safety devices, motor control equipment, automation software, and HMI panels. Allen-Bradley products are known for their reliability and integration with other systems.

Frequently Asked Questions about 1771-ID16
Question: What is the 1771-ID16 used for?
Date Update:23/05/2025
Answer:

The 1771-ID16 is a digital DC input module designed for Allen-Bradley PLC-5 systems. It provides 16 discrete input channels to receive 24V DC signals, typically used to monitor field devices such as push buttons, limit switches, or sensors.

Question: Is the 1771-ID16 compatible with modern Allen-Bradley systems?
Date Update:23/05/2025
Answer:

The 1771-ID16 is designed specifically for PLC-5 systems and 1771 I/O chassis. It is not natively compatible with newer platforms such as CompactLogix or ControlLogix, unless using Rockwell’s conversion/migration hardware.

Question: How is the 1771-ID16 wired?
Date Update:23/05/2025
Answer:

Each of the 16 input points is wired to a 24V DC source and a sourcing device. The module uses a removable terminal block (RTB) for field wiring, such as the 1771-WH or 1771-WHFB.

Question: Can the 1771-ID16 be used with AC signals?
Date Update:23/05/2025
Answer:

No. The 1771-ID16 is strictly for DC voltage input (10–30V DC). For AC signal applications, a different module like the 1771-IA16 (120V AC input) should be used.

Question: Is the 1771-ID16 still available or supported, and what is the recommended migration path?
Date Update:23/05/2025
Answer:

The 1771-ID16 is a discontinued product, as Rockwell Automation has phased out both the PLC-5 platform and the 1771 I/O series. While it may still be found through surplus suppliers or third-party vendors, it is no longer supported for new installations. Rockwell recommends migrating to modern control platforms such as ControlLogix (1756 series) or CompactLogix (5069 series). For digital DC input applications, suitable replacement modules include the 1756-IB16 for ControlLogix and the 5069-IB16 for CompactLogix—both of which offer improved performance, diagnostics, and seamless integration with Studio 5000.

IQElectro is not an authorized distributor.
IQElectro LLC (IQElectro) is NOT an Authorized Distributor or in any way affiliated with Rockwell Automation, Siemens, or any other Manufacturers. IQElectro is NOT an Authorized Dealer of this product. The product may be of older version, date codes, or design than that available from authorized dealers. As IQElectro is not an authorized dealer of this product, the Original Manufacturer's Warranty and Support DO NOT apply. IQElectro sells SURPLUS only and DOES NOT SELL SOFTWARE or FIRMWARE licenses For more detailed information, please refer to the full version of our disclaimer policy Disclaimer Policy.
Description / Specifications

Description
The Allen-Bradley 1771-ID16 is a digital input module for PLC-5 systems. It provides 16 isolated input channels for 120V AC/DC signals, designed to connect ON/OFF field devices to the controller. This module is commonly applied in industrial automation, machine control, and process applications requiring reliable digital signal acquisition.

 

 

Technical Specifications 

Manufacturer Rockwell Automation
Brand Allen-Bradley
Part Number/Catalog No. 1771-ID16
Module Type Digital AC/DC Input Module
Number of Inputs 16 Inputs
Voltage Category 120 Volts AC/DC
AC Operating Voltage 77-138 Volts
DC Operating Voltage 105-138 Volts
Backplane Current 75 Miliamperes
Max AC Off-State Current 4.0 Miliamperes
Max DC Off-State Current 1.8 Miliamperes
Typical AC Signal Delay (On) 1 ms
Typical DC Signal Delay (On) 1 ms
Typical AC Signal Delay (Off) 9 or 18 ms
Typical DC Signal Delay (Off) 9 ms
Wiring Arm 1771-WN
Dimensions 3.5 x 6.5 x 2.0 in (89 x 165 x 51 mm)
Series PLC 5

  

 

Information About 1771-ID16

The 1771-ID16 belongs to the Allen-Bradley 1771 Universal I/O family, developed to interface discrete devices with PLC-5 processors. It supports 16 individually isolated inputs at 120V AC/DC and is designed with input filtering to suppress noise and voltage transients caused by contact bounce. The module has a factory-set filter time of 9 ms, with typical delays of 9–18 ms for AC on/off transitions and 0.57 ms for DC switching. It installs in a 1771 I/O chassis such as the 1771-A1B or 1771-A4B and uses the 1771-WN wiring arm for secure field connections. Built for isolated multi-phase applications, the 1771-ID16 is suitable for interfacing with limit switches, float switches, selector switches, and pushbuttons. Its modular design allows hot-swapping (removal and insertion under power) without rewiring, making it practical for demanding industrial environments.

Key Features:

  • Design: 16-channel digital input module with isolated 120V AC/DC inputs.
  • Input Filtering: Customer-selectable filters suppress noise and voltage transients, improving reliability.
  • Performance: Factory-set filter time of 9 ms with 9–18 ms AC delay and 0.57 ms DC delay.
  • Compatibility: Operates with PLC-5 controllers in 1771 I/O chassis (e.g., 1771-A1B, 1771-A4B).
  • Connectivity: Uses 1771-WN wiring arm for quick connections and easy module replacement.
  • Durability: Designed for long service life with support for millions of switching operations.
  • Application Range: Interfaces with ON/OFF devices such as pushbuttons, limit switches, pilot lights, annunciators, and motor starters.
  • Ease of Maintenance: Supports removal and insertion under power (RIUP) without disconnecting field wiring.

The 1771-ID16 delivers the robustness and reliability required for industrial digital input applications in PLC-5 automation systems.

 

Manufacturer information

Allen-Bradley, a brand of Rockwell Automation, specializes in manufacturing industrial automation equipment. The product range includes programmable logic controllers (PLCs), motion control systems, safety devices, motor control equipment, automation software, and HMI panels. Allen-Bradley products are known for their reliability and integration with other systems.

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