1738-VHSC24M23 Allen-Bradley

1738-VHSC24M23 Allen-Bradley Central control module

Brand：Allen-Bradley Model number：1738-VHSC24M23

Country of origin: United States Product weight：0.55kg

HS code：8517623990

Product Details：

Product Dimensions：

The Allen-Bradley 1738-VHSC24M23 is a Very High-Speed Counter (VHSC) module belonging to the ArmorPoint I/O family. This module is specifically designed for "On-Machine" applications, allowing it to be mounted directly on a machine rather than inside a traditional centralized electrical cabinet. The 1738-VHSC24M23 provides high-speed pulse counting and frequency measurement capabilities for ControlLogix, CompactLogix, and other PLC systems via a network adapter. It features M23 style connectors, which provide a secure and sealed interface for sensors and actuators in harsh environments.

Technical Specifications

Module Type: Very High Speed Counter (VHSC)
Input Voltage: 24V DC
Number of Channels: 2 independent counter channels
Input Frequency: Supports a maximum input frequency of up to 1 MHz
Input Signals: Compatible with 24V DC incremental encoders and various high-speed pulse sources
Output Points: Includes 2 sourcing outputs that can be tied to counter presets for immediate hardware-level response
Connection Interface: M23 12-pin threaded connectors
Enclosure Rating: IP67, IP69K (dust-tight and water-resistant for high-pressure washdowns)
Operating Temperature: -20 to 60 degrees Celsius (-4 to 140 degrees Fahrenheit)
Counter Modes: Supports Counter, Encoder (X1, X2, X4), and Period/Rate measurement modes

Product Advantages

On-Machine Design: The ruggedized housing eliminates the need for a separate protective enclosure, significantly reducing wiring costs, labor, and the overall footprint of the control system.
Exceptional Speed: With a 1 MHz counting frequency, this module is capable of processing data from high-precision encoders and high-speed production lines with minimal latency.
Local Output Control: The integrated outputs can react to counter values within microseconds, bypassing the PLC scan time for critical tasks like high-speed sorting or emergency stops.
Durable Connectivity: The M23 connector system is vibration-resistant and sealed, ensuring reliable electrical contact even in environments with heavy mechanical movement or fluid exposure.
Seamless Integration: Like other Bulletin 1738 modules, it integrates easily into the Rockwell Automation Studio 5000 environment, allowing for straightforward configuration and diagnostics.

Important Precautions

Wiring Integrity: Ensure that M23 cables are properly seated and tightened to maintain the IP67/IP69K seal. Loose connectors can lead to moisture ingress and intermittent signal loss.
Power Supply Quality: Use a regulated 24V DC power source. Excessive noise or voltage spikes on the power line can interfere with high-speed pulse counting accuracy.
Shielding and Grounding: To prevent electromagnetic interference (EMI) from affecting the high-frequency signals, always use shielded cables for encoder connections and ensure the shield is correctly grounded.
Module Orientation: While the module is rugged, it should be mounted in a way that prevents significant physical impact and allows for adequate heat dissipation during high-speed operation.
Disconnection Safety: Never connect or disconnect the M23 cables while power is applied to the module, as this may cause electrical arcing or damage to the sensitive internal electronics.

Product Applications

High-Speed Packaging: Used for tracking product position on conveyor belts and triggering labeling or sealing mechanisms at precise intervals.
Motion Control and Positioning: Interfacing with incremental encoders to provide real-time position feedback for motor-driven axes in CNC or robotic applications.
Flow Measurement: Monitoring high-frequency pulse outputs from flow meters in liquid and gas processing plants to calculate total volume or flow rates.
Bottling and Canning: Managing high-speed counting for filling lines where hundreds of units pass a sensor every minute.
Material Handling: Detecting the speed and position of automated guided vehicles (AGVs) or high-speed sorting systems in logistics warehouses.

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