Allen-Bradley 1794-OC16 16-Channel Sourcing Output Module

Product Introduction

The Allen-Bradley 1794-OC16 Flex I/O module delivers a compact and flexible solution for digital output control. This module features 16 non-isolated sourcing outputs in a single group, making it perfect for space-sensitive control cabinets. Designed to integrate seamlessly with the Flex I/O system, the 1794-OC16 allows easy detachment and swapping without altering existing field wiring. Its robust design ensures high reliability in demanding industrial environments. This module significantly reduces installation time and maintenance costs for system integrators.

Technical Specifications

The 1794-OC16 operates with a nominal output voltage of 48V DC. Its on-state voltage range spans from a minimum of 30V DC to a maximum of 60V DC. At 45 °C ambient temperature, the module supports up to 60V DC. When operating at 55 °C, the maximum on-state voltage is 55V DC.

For current handling, each channel supports an on-state current from 2.0mA minimum up to 500mA maximum. The module's total output current rating reaches 8A, distributing 0.5A across each of its 16 channels. The off-state voltage max is 60V DC, with a maximum leakage current of just 1.0mA.

This module also features a maximum on-state voltage drop of 1.0V DC at 0.5A. Its output signal delay is minimal, with an off-to-on delay of 0.5ms. The on-to-off delay is 1.0ms at 25 °C and 2.0ms at 55 °C.

Furthermore, the 1794-OC16 provides robust isolation. It is 100% tested at 1900V DC for 1 second between the user and system. However, there is no isolation between individual channels, which is a key design point for shared common circuits.

Mechanical and Environmental Parameters

The Allen-Bradley 1794-OC16 is designed to withstand harsh industrial conditions. Its dimensions are 46mm x 94mm x 53mm, and it weighs approximately 0.11 kg. For installation, it supports an operational temperature range of 0 to 55 °C. The storage temperature range is from -40 to 85 °C. The module also handles a relative humidity of 5 to 95% noncondensing. It is tested for shock at 30g peak acceleration and vibration at 5g @ 10-500Hz.

Installation and Wiring Guide

Installing the 1794-OC16 requires a compatible terminal base unit. Compatible bases include the Cat. No. 1794-TB3, -TB3S, or -TB2. The module attaches directly to the base, which holds the field wiring connections. The keyswitch position for this module must be set to Position 2 before installation. This setting is essential for proper system recognition.

First, ensure the external DC power supply is within the nominal 48V DC range. The supply voltage range is 30 to 60V DC. Next, mount the terminal base on a DIN rail. Then, firmly press the 1794-OC16 module into the base until it snaps securely. Finally, connect the field devices to the appropriate terminals on the base unit. Always disconnect power before installing or removing the module to prevent damage.

Packaging and Shipping

Your Allen-Bradley 1794-OC16 module ships in protective packaging to ensure safe delivery. The shipment will include the module itself and any necessary hardware for standard mounting. Please note that the terminal base unit and fuse are not included. We primarily use Fedex, UPS, and DHL for global shipping. This ensures fast and reliable delivery to your facility.

Frequently Asked Questions (FAQ)

1. What is the nominal voltage for the 1794-OC16 module?
The Allen-Bradley 1794-OC16 has a nominal output voltage of 48 Volts DC.

2. Which terminal base is compatible with this module?
It fits multiple bases, including the Cat. No. 1794-TB3, -TB3S, -TB2, and -TB3K.

3. What is the keyswitch position for the 1794-OC16?
The required keyswitch position for this module is Position 2.

4. Can I replace this module without disconnecting the field wiring?
Yes, the Flex I/O design allows for module replacement without disturbing the pre-existing field wiring. The 1794-OC16 supports hot swapping.

5. What is the maximum output current per channel?
Each channel on the 1794-OC16 supports a maximum on-state current of 500mA.