Allen-Bradley 1771-OGD | PLC 5 TTL Digital Output Module

Product Overview

The 1771-OGD is a high-performance TTL digital output module from Allen-Bradley, designed for the PLC 5 series. It features 16 transistor-transistor logic (TTL) outputs and requires dual power sources: the I/O chassis backplane and an external 5V DC supply.

This module provides precise logic-level signal transmission with fast output switching and excellent isolation, ensuring reliable performance in industrial environments. It supports standard 14-gauge shielded wire and includes a wiring arm for convenient field replacement.

The 1771-OGD supports flexible logic selection between “High = True” and “Low = True,” making it compatible with diverse control applications. Its compact and rack-mountable design allows seamless integration into the 1771 I/O chassis system.

Technical Specifications

Key Features

• Dual Power Supply: Operates with I/O backplane and external 5V DC supply.

• 16 TTL Outputs: Provides high-speed, low-voltage digital signaling.

• Fast Response: Less than 1ms output delay ensures precise control.

• Isolated Outputs: 1500 V AC isolation protects internal circuitry.

• Field Wiring Convenience: Comes with 1771-WH wiring arm for easy replacement.

• Logic Flexibility: Configurable for “High = True” or “Low = True” operation.

Applications

• PLC 5 control systems requiring TTL digital outputs

• Industrial automation and process control

• Logic signal distribution to downstream devices

• Systems requiring high-speed digital switching

FAQ

Q1: Is the 1771-OGD module original and factory-new?
Yes, the 1771-OGD is 100% original from Allen-Bradley.

Q2: What voltage does the module require?
It operates with 5 V DC external power and receives additional power from the I/O chassis backplane.

Q3: How many outputs does the module provide?
The module provides 16 TTL outputs suitable for digital control applications.

Q4: What is the typical response time?
It has a maximum DC signal delay of 50 ms and AC signal delay of 45 ±15 ms.

Q5: What certifications does the module hold?
The 1771-OGD is CSA, CE, and UL certified for industrial use.