Allen-Bradley 1794-OB16P Flex I/O Discrete Output Module

Product Overview

The 1794-OB16P is a discrete output module from Rockwell Automation. It belongs to the Flex I/O platform. This module has sixteen sourcing outputs. Each output is electronically fused. The module delivers 24VDC voltage output. It is ideal for energizing solenoids, indicator lights, and relay coils. The module requires a terminal base for installation. Compatible bases include 1794-TB2, 1794-TB3, 1794-TB3S, and others.

Application Scenarios

This module works with Flex I/O communication adapters. These adapters include ControlNet, DeviceNet, PROFIBUS, and EtherNet/IP. The 1794-OB16P operates as distributed I/O for Logix controllers. It also works with legacy PLC-5 and SLC 500 systems. Common applications include machine control, process automation, and material handling. The module handles up to 500 mA per channel. It supports surge current of 2 A for 50 ms.

Technical Specifications

• Outputs: 16 sourcing, electronically fused
• On-state voltage: 10 to 31.2V DC (nominal 24V DC)
• Output current: 1 mA min, 500 mA max per channel, 8 A per module
• On-state voltage drop: max 0.5V DC
• Off-state leakage current: max 0.5 mA
• Output delay: 0.5 ms OFF to ON, 1 ms ON to OFF
• Power dissipation: 5 W at 31.2V DC
• Thermal dissipation: 17 BTU/hr at 31.2V DC
• FlexBus current: 60 mA at 5V DC
• Operating temperature: 0 to 55°C
• Storage temperature: -40 to 85°C
• Vibration: 5 g at 10 to 500 Hz
• Shock: 30 g operating, 50 g non-operating
• Isolation voltage: 50V continuous

Installation & Maintenance Guide

Install the 1794-OB16P on a compatible terminal base. Use a DIN rail for mounting. Hook the terminal base over the top of the rail. Slide it tight against the adjacent module. Push until it locks. Wire field devices to the terminal strips. Use the top strip for I/O signals. Use the middle strip for common and bottom for supply voltage. Ensure external DC supply is 10 to 31.2V DC. The module does not require isolation between channels. Regularly check for loose connections and clean dust.

Packing List

• 1 x Allen-Bradley 1794-OB16P output module
• 1 x instruction manual

Shipping is via FedEx, UPS, or DHL.