1771-IG Allen-Bradley PLC 5 TTL Digital DC Input Module

Product parameters

Module type: TTL Input Module

Series: Allen-Bradley PLC-5 series

Input points: 8 TTL inputs (single group, Current absorbing type, Current Sinking)

Working voltage:

Nominal input voltage: 5V DC (TTL compatible)

Input voltage range: 5.0-5.3V DC

On-state voltage: Minimum 2V DC

Cut-off state voltage: Up to 0.8V DC

Input current:

On state: Maximum 500 mA (total customer power supply current of the module)

Off status: Maximum 1.5mA

Backplane current: 122 mA (5V DC)

Power dissipation

Maximum power dissipation: 3.3W

Maximum heat dissipation: 11.3 BTU/ hour

Input signal delay: less than 1 ms (transition from input signal to logical state)

Isolation: Photoelectric isolation, protecting the system circuit from the influence of electrical transients

Wiring arm: 1771-WC detachable wiring arm, allowing module replacement without disconnecting the wiring

I/O addressing: Supports ½ slot, 1 slot and 2 slot addressing

Module location: Installed in the 1771 I/O rack (except for the leftmost slot, which should be reserved for the processor or adapter)

Key control slots: Upper connector key control pins 34-36, lower connector key control pins 4-6

Status indication: 8 red status indicator lights, used to display the status of TTL input signals

Environmental conditions:

Operating temperature: 0 to 60°C (32 to 140°F)

Storage temperature: -40 to 85°C (-40 to 185°F)

Relative humidity: 5-95% (non-condensing)

Protection grade: IEC IP20 (needs to be installed in an appropriate protection cabinet)

Function

TTL signal processing

It provides 8 TTL input channels (5V DC, current absorption type) for connecting TTL compatible devices, such as encoders, counters or digital logic circuits.

Convert the external TTL signal to the corresponding bit state in the PLC data table.

Convenience of wiring:

Equipped with the 1771-WC detachable wiring arm, it supports the Removal and Insertion Under Power (RIUP) of the module during removal and insertion, simplifying maintenance.

The module supports fast signal response with an input delay of less than 1 ms, making it suitable for high-speed applications.

Isolation and Protection

It provides photoelectric isolation to protect the PLC system circuit from external electrical transient interference.

Built-in input filtering function to reduce the interference of electrical noise on the signal.

Status monitoring: Equipped with 8 red LED status indicator lights located on the front panel of the module, they are used to display the TTL signal status of each input channel, facilitating on-site debugging and fault diagnosis.

Flexible addressing

Supports ½ slot, 1 slot and 2 slot I/O addressing, and is compatible with multiple 1771 I/O rack configurations.

Ensure that the module is installed in the correct position through the key control slots (pins 34-36 and 4-6).

Compact design: The module design is compact and suitable for control cabinets with limited space. It is installed in the 1771 I/O rack and works in coordination with the PLC-5 processor.

Application scenarios

Encoder and counter interface:

It is used to connect BCD (binary encoded decimal) interface encoders or high-precision counters to process high-speed pulse signals.

It is commonly found in rotary encoders, position detection or counting applications, such as packaging machines or conveyor belt systems.

TTL logic interface

It is applicable to the interface of digital logic devices compatible with TTL, such as microcontrollers, sensors or dedicated digital circuits.

It is suitable for scenarios that require low-voltage and high-speed signal processing, such as electronic manufacturing or testing equipment.

Industrial Automation

Used for distributed control in the PLC-5 system to monitor high-speed switches or logic signals.

It is commonly found in the automotive manufacturing, semiconductor production or precision machinery industries.

High-speed signal processing: Due to the input signal delay being less than 1 ms, it is suitable for applications that require rapid response, such as high-speed production lines or automated assembly lines.

Traditional system maintenance: As a component of the PLC-5 system, it is suitable for maintaining or expanding existing old automation systems.

Advantage Products:

All items are Distributor Ready-stock Genuine Brand-new Supplying, please inform us if the other conditions are needed, Used, Open-box, Refurbished, etc.

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