Allen-Bradley 1794-PS13 Flex I/O Power Supply

1794-PS13 24V DC Power Supply Module by Allen-Bradley

Product Introduction

The Allen-Bradley 1794-PS13 is a dedicated power supply for the Flex I/O system. This module converts AC line voltage to regulated 24V DC power. It supplies power to Flex I/O modules and communication adapters. Its compact design saves space in the control cabinet. The module supports daisy-chaining to power multiple adapters. This feature simplifies system wiring and reduces installation costs.

Key Input Specifications

The 1794-PS13 accepts a wide range of AC input voltages. The input voltage range is 85 to 264V AC at 47 to 63 Hz. The nominal input voltages are 120V AC at 0.6A and 230V AC at 0.42A. The maximum input current is 0.7A. The module can withstand inrush current during startup. This robust input stage ensures stable operation even with fluctuating line voltages.

Protection Features

The 1794-PS13 includes comprehensive protection features. The overcurrent protection trips at 1.4A. The overvoltage protection is internally limited to 35V DC. This protection shuts down the unit if the output exceeds 35V DC. The isolation voltage between AC input and DC output is 2500V DC for 1 second. This high isolation level protects connected equipment from electrical faults.

Status Indicator

The module features a built-in power indicator. The indicator turns green when the output voltage exceeds 20.4V DC but remains below 28V DC. The indicator remains OFF under three conditions. These are when no power is applied, when output voltage exceeds 35V DC, or when overcurrent protection activates above 1.4A. This simple visual feedback aids troubleshooting.

Environmental Ratings

The 1794-PS13 operates reliably in industrial conditions. The operating temperature range is 0 to 55°C (32 to 131°F). The storage temperature range is -40 to 85°C (-40 to 185°F). It tolerates 5 to 95% non-condensing relative humidity. The module withstands vibration of 5G at 10 to 100 Hz. It handles operating shock of 30G and non-operating shock of 50G.

Mechanical Specifications

The module dimensions are 87mm H x 69mm W x 69mm D (3.4 x 2.7 x 2.7 inches). The enclosure type is open-type. Therefore, it requires installation inside a suitable protective enclosure. The recommended wire size is 0.34 to 2.5 mm² (22 to 12 AWG). Use solid or stranded copper wire with 75°C insulation rating or higher. The maximum insulation thickness is 1.2 mm (3/64 inch). Apply 0.8 Nm (7 lbs-in) torque to tighten connections. The wiring category is 2.

Power Dissipation and Thermal Management

The 1794-PS13 has a maximum power dissipation of 7 Watts. The maximum thermal dissipation is 23.9 BTU/hour. This low heat generation allows installation in compact enclosures. Proper ventilation is still recommended for optimal performance. The module does not require active cooling in most installations.

System Integration

This power supply integrates seamlessly with the Flex I/O system. It supports daisy-chaining of the supply output. This daisy-chain capability powers multiple adapters and modules. The 1794-PS13 works with both AC and DC modules. It provides reliable power for the entire Flex I/O system. The module mounts on a standard DIN rail. Installation is quick and straightforward.

Installation Guidelines

Installing the 1794-PS13 follows a simple procedure. First, mount the module on a DIN rail in the enclosure. Then, connect the AC input wiring to the input terminals. Observe proper polarity for DC output connections. Use the recommended wire sizes and torque specifications. Ensure proper grounding for electrical safety. The module does not require any configuration before operation.

Application Scenarios

The 1794-PS13 powers various Flex I/O configurations. It supplies power for communication adapters. It supports analog and digital I/O modules. The module suits distributed control applications. It works in manufacturing automation systems. It also supports process control installations. The wide input voltage range makes it suitable for global applications.

Packaging and Shipping

All modules undergo careful packaging before shipment. We use anti-static materials to prevent electrostatic damage. The packaging provides sufficient cushioning against physical impacts. The packaging list does not include certificates or warranties. Each shipment includes the power supply module only. We ship globally using trusted couriers such as FedEx, UPS, and DHL.

Packaging List

• Allen-Bradley 1794-PS13 Power Supply Module (1 unit)

• Installation Instructions (Printed Quick Guide)

Frequently Asked Questions (FAQ)

1. What is the output voltage of the 1794-PS13?
The 1794-PS13 provides a nominal output of 24V DC. The output voltage range is 20.4 to 27.6V DC.

2. How many adapters can the 1794-PS13 power?
This power supply provides sufficient surge capacity to drive up to four adapters simultaneously.

3. What input voltages does the 1794-PS13 accept?
The 1794-PS13 accepts a wide input range of 85 to 264V AC at 47 to 63 Hz. This covers both 120V and 230V nominal systems.

4. What does the green indicator light on the 1794-PS13 mean?
The green indicator turns on when the output voltage exceeds 20.4V DC but remains below 28V DC. This indicates normal operation.

5. Does the 1794-PS13 provide overcurrent protection?
Yes, the module includes overcurrent protection that trips at 1.4A. It also has overvoltage protection at 35V DC.