Allen-Bradley 1794-OB32P – Flex I/O Electronically Protected Discrete Output Module

Overview

The Allen-Bradley 1794-OB32P is a Flex I/O digitally controlled 24V DC output module. It features individual channel protection and provides thirty-two (32) 24V DC sourcing output channels. Designed for high-reliability industrial applications, this module ensures safe and precise control of connected field devices.

Key Features

• 32 digitally fused, electronically protected output channels.

• Two groups of 16 outputs each with separate voltage sources.

• Self-protected outputs against temperature overloads and shocks.

• 32 yellow status indicators for easy monitoring of channel activity.

• Compatible terminal bases: 1794-TB32 and 1794-TB32S.

• DIN rail mount installation.

• Open-type enclosure for flexible integration.

Technical Specifications

• Manufacturer: Rockwell Automation

• Brand: Allen-Bradley

• Product Type: Flex I/O Digital DC Output Module

• Part Number/Catalog No.: 1794-OB32P

• Number of Outputs: 32 sourcing current channels

• Output Circuit Type: Sourcing

• On-state Voltage: 10–31.2 VDC (nominal 24V DC)

• On-state Voltage Drop Max: 0.5 V DC

• On-state Current Max: 500 mA per channel

• Off-state Leakage Current Max: 0.5 mA

• Output Current Rating: 14 A max per module (6 A total for Channels 0–15; 8 A total for Channels 16–31)

• External Supply Voltage Range: 10–31.2 VDC

• External Supply Current Range: 103–273 mA

• Maximum Output Surge Current: 2 A for 50 ms (repeatable every 2 s)

• Output Delay: 0.5 ms OFF-to-ON, 1 ms ON-to-OFF

• Isolation Voltage: 50 V continuous between field and system

• Flexbus Current: 80 mA @ 5V DC

• Power Dissipation: 5.3 W @ 31.2 VDC max

• Thermal Dissipation: 18.1 BTU/hr @ 31.2 VDC max

• Mounting: DIN Rail

• Wire Size: Determined by installed terminal base

• Enclosure: Open-type

• Operating Temperature: 0–55 °C (32–131 °F)

• Storage Temperature: -40–85 °C (-40–185 °F)

• Vibration: 5 g @ 10–500 Hz

• Operating Shock: 30 g

• Dimensions: 1.8 × 3.7 × 2.1 inches

Description

The 1794-OB32P is an electronically protected digital output module suitable for industrial automation applications. Its outputs are grouped in two separate 16-channel blocks with self-protection against overload and short-circuits. Each channel has a dedicated LED status indicator, enabling quick visual verification of output activity.

This module supports DIN rail mounting and is only compatible with terminal bases 1794-TB32 and 1794-TB32S. With fast response times and high current handling capacity, the 1794-OB32P ensures reliable and safe control of field devices, providing both precision and protection for critical automation systems.