1746-OA8 | Allen-Bradley SLC 500 Discrete AC Output Module

Overview

The Allen-Bradley 1746-OA8 is a discrete AC output module designed for the SLC 500 series. It provides eight output channels organized into two groups, offering reliable switching for AC loads in industrial automation systems. With robust electrical ratings and fast response times, it is well-suited for general-purpose applications.

Technical Specifications

• Manufacturer Allen-Bradley

• Product Line SLC 500

• Part Number 1746-OA8

• Weight 0.20 kg (0.44 lbs)

• Module Type Discrete AC Output Module

• Number of Groups 2

• Channels per Group 4

• Nominal Output Voltage 120 / 240 VAC

• Output Voltage Range 85–264 VAC

• Backplane Current Consumption 185 mA at 5 VDC

• ON Signal Delay (Resistive Load) 1 ms

• OFF Signal Delay (Resistive Load) 11 ms

• Continuous Current per Point 1.0 A at 30 °C (86 °F); 0.5 A at 60 °C (140 °F)

• Continuous Current per Module 8.0 A at 30 °C (86 °F); 4.0 A at 60 °C (140 °F)

• On-State Voltage Drop (Max) 1.5 V at 1.0 A

• Surge Current per Point 10 A for 25 ms

• Step Response 60 ms input, 2.5 ms output

Application Scenarios

• General-purpose AC load control in manufacturing systems

• Switching of lighting, heating, or motor loads

• Integration into Allen-Bradley SLC 500 PLC systems for distributed control

FAQ

Q: How many outputs does the 1746-OA8 provide?  A: The module offers 8 outputs, divided into 2 groups of 4 channels each.

Q: What is the maximum current per channel?  A: 1.0 A at 30 °C and 0.5 A at 60 °C.

Q: Is this module suitable for inductive loads?  A: It is primarily designed for resistive loads, but can handle moderate inductive loads within rated specifications.