Product Introduction
The Allen-Bradley 1794-VHSC Flex I/O Very High Speed Counter Module delivers precise, high-speed counting for demanding industrial automation applications. As part of the Flex I/O family, this module is designed to replace older counter solutions and upgrade system performance. With 2 input channels and 2 groups of 3 inputs per counter, the 1794-VHSC handles up to 1 MHz input frequency, making it suitable for fast encoder and sensor signals.
Technical Specifications
Based on manufacturer data, the Allen-Bradley 1794-VHSC offers the following key parameters:
| Parameter |
Value |
| Product Type |
Flex I/O Very High Speed Counter Module |
| Input Channels |
2 |
| Inputs per Counter |
2 Groups of 3 |
| Input Voltage |
5V DC |
| Input Off-state Current |
<0.25 mA |
| Input On-state Current |
>5 mA |
| Outputs |
2 Isolated Groups of 2 |
| Output Supply Voltage Range |
10-31V DC |
| Power Dissipation |
5.0W @ 31.2V DC max. |
| Thermal Dissipation |
17.1 BTU/hr. @ 31.2V DC max. |
Industry Applications
The 1794-VHSC excels in high-speed counting scenarios such as material handling, packaging, and conveyor systems. Its 1 MHz input frequency accommodates fast-moving parts, while isolated outputs provide reliable signal transmission to PLCs. Upgrade existing systems with the 1794-VHSC to reduce downtime and improve accuracy.
Compatibility & Integration
This module integrates with Allen-Bradley ControlLogix and CompactLogix platforms via Flex I/O architecture. It requires a 1794-TB3G or 1794-TB3GS terminal base unit and a 24V DC nominal external power supply (19.2-31.2V DC range). The 1794-VHSC supports high-speed counting for EtherNet/IP-enabled controllers, ensuring seamless data exchange.
Upgrade Guide
Replacing older counter modules with the Allen-Bradley 1794-VHSC simplifies wiring and boosts performance. The module's compact design (3.7 x 3.7 x 2.7 inches) fits existing enclosures, and its key-switch position ensures correct installation. Verify compatibility with your control system and terminal base before purchase.
Selection Guide & Purchasing Advice
When selecting the 1794-VHSC, confirm your controller supports Flex I/O and that the terminal base (1794-TB3G or 1794-TB3GS) is available. For reliable supply and quick delivery, choose UBEST Automation as your trusted partner. Contact us for detailed specifications and ordering assistance.