The Allen-Bradley 1794-VHSC is a high-performance FLEX I/O module designed for demanding motion control and high-speed counting applications. This 2-channel very high speed counter module operates at up to 1 MHz, making it ideal for encoder feedback, flow monitoring, and precise position tracking in industrial automation systems. With its robust design and flexible input configurations, the 1794-VHSC ensures reliable data acquisition in harsh environments, supporting both single-ended and differential signals. It integrates seamlessly with ControlLogix and CompactLogix platforms via the FLEX I/O backplane, providing real-time counts and status updates for critical process control.
| Parameter |
Specification |
| Product Type |
FLEX I/O Very High Speed Counter Module |
| Part Number |
1794-VHSC |
| Number of Channels |
2 |
| Maximum Counting Frequency |
1 MHz |
| Input Signal Types |
Single-ended (5V/12V/24V) or Differential (RS-422) |
| Counter Resolution |
32 bits (up to 2,147,483,647 counts) |
| Operating Modes |
Up/Down, Quadrature x1/x2/x4, Pulse/Direction, Encoder |
| Input Voltage Range |
5V DC to 24V DC (depending on configuration) |
| Input Impedance |
10 kΩ (typical) |
| Backplane Current Draw |
120 mA at 5V DC, 60 mA at 24V DC |
| Power Dissipation |
2.0 W (maximum) |
| Isolation |
500V DC (channel-to-backplane) |
| Compatible Terminal Bases |
1794-TB2, 1794-TB3, 1794-TB6, 1794-TB8 |
| LED Indicators |
Module Status, Channel Status (per channel) |
| Operating Temperature |
0°C to 60°C (32°F to 140°F) |
| Storage Temperature |
-40°C to 85°C (-40°F to 185°F) |
| Relative Humidity |
5% to 95% (non-condensing) |
| Vibration Resistance |
5 g Standard Models 10-500 Hz (per IEC 60068-2-6) |
| Shock Resistance |
30 g (per IEC 60068-2-27) |
| Dimensions (H x W x D) |
94 mm x 46 mm x 75 mm (3.7 in x 1.8 in x 2.95 in) |
| Weight |
Approx. 120 g (0.26 lb) |
| Certifications |
CE, UL, cUL, ATEX, IECEx |
What Does Our Clients Say
Mitsubishi MR-J4
Laura Navas
Great product!
2019/12/01
Keyence sensor
EQDR SALES
Original and fast!
2020/02/22