Allen-Bradley 1794-VHSC Flex I/O Very High Speed Counter Module

Product Overview

The Allen-Bradley 1794-VHSC is a Flex I/O very high speed counter module. It has 2 input channels. Each channel has 2 counters. This module handles high-speed counting up to 1 MHz. It works with encoders and other fast pulse signals. The module uses 5V DC or 15-24V DC terminations. It provides 2 isolated output groups. This module fits many industrial automation tasks.

Application Scenarios

Use this module for precise counting in packaging lines. It works for speed measurement on conveyors. It monitors position in motion control systems. The high-speed input handles encoder feedback. The module also suits flow metering and batch counting. It integrates with Allen-Bradley PLCs via EtherNet.

Technical Specifications

Input channels: 2. Inputs per counter: 2 groups of 3. Input voltage: 5V DC or 15-24V DC (depending on termination). Input off-state voltage: less than 1.8V DC. Input off-state current: less than 0.25 mA. Input on-state current: more than 5 mA. Outputs: 2 isolated groups of 2. Output supply voltage: 10-31V DC. Power dissipation: 5.0 W at 31.2V DC. Thermal dissipation: 17.1 BTU/hr at 31.2V DC. Operating temperature: 0 to 55 °C. Dimensions: 3.7 x 3.7 x 2.7 inches.

Installation & Maintenance Guide

Mount the module on a 1794-TB3G or 1794-TB3GS terminal base. Set the key-switch to position 1. Connect external 24V DC power (19.2-31.2V DC). Ensure proper wiring for 5V or 15-24V termination. The module provides 50V isolation between 6 areas. Test isolation at 850V DC for 1 second. Keep the module in a clean, dry environment. Check connections periodically.

Packing List

1 x Allen-Bradley 1794-VHSC module. 1 x instruction manual. No terminal base included. Secure packaging for shipping. We ship via FedEx, UPS, or DHL.