The Omron H7CX-A4-N, also cataloged as the H7CX Multifunction Counter/Tachometer, operates as a dedicated hardware component for high-speed pulse processing, rotational speed tracking, and discrete control switching within automated machine control panels.

Model Suffix Key & Functional Configuration

• H7CX: Standard DIN 48 x 48 mm panel-mount digital counter/tachometer series base
• A: Standard functionality specification profile
• External Connections (None): Direct screw terminal block rear interface configuration
• 4: 4-digit 7-segment display resolution stage (0 to 9999 display range)
• Settings (None): Single-stage limit value preset configuration
• Output Type (None): Contact output relay or combined contact/transistor switching configuration
• Supply Voltage (None): Operating power line input rated at 100 to 240 VAC at 50/60 Hz
• N: Updated internal hardware revision designation

Physical & Electrical Performance Specifications

Deterministic Network Interfacing & Embedded Architecture

The internal high-speed sampling processor processes microsecond input pulses for accurate frequency evaluation and count accumulation. Built-in non-volatile EEPROM memory guarantees firmware flash compatibility and preserves parameter registers across power outages without battery backup. Direct screw terminal wiring facilitates low-latency signal acquisition and status reporting to programmable controllers operating across Profinet and EtherNet/IP deterministic networks via external fieldbus adapters.

Packaging & Standard Kit Manifest

• 1 x Omron H7CX-A4-N Digital Counter/Tachometer Unit
• 1 x Panel Mounting Adapter Bracket
• 1 x Waterproof Gasket Ring
• 1 x Terminal Cover Assembly
• 1 x Instruction Sheet & Wiring Guide

Panel Installation & Field Wiring Guidelines

• Panel Cutout Assembly

  Cut a standard 45 x 45 mm square opening in the cabinet enclosure door. Slide the rubber sealing packing over the front bezel, insert the counter into the cutout, and snap the rear mounting adapter into place.

• Screw Terminal Connections

  Strip lead wires to 6-8 mm and secure them directly to the rear M3.5 screw terminals. Ensure proper torque on terminal screws to maintain low-resistance contact for power supply and relay leads.

• Conduit Separation & Noise Suppression

  Isolate sensor signal wiring from high-voltage AC feeds and variable frequency drive motor cables. Connect external cable shields to a single cabinet ground bar to prevent electromagnetic interference.

Frequently Asked Questions

• What supply voltage input is required for the H7CX-A4-N?

  The unit operates on 100 to 240 VAC line power at 50/60 Hz, accommodating operating voltage fluctuations between 85% and 110% of nominal.

• How are field wires connected to the rear of this model?

  This variant features direct M3.5 screw terminals integrated into the rear housing rather than a plug-in circular socket base.

• What display resolution is available on the front LCD panel?

  The unit features a 4-digit backlit LCD display stage supporting a full totalizing and tachometer readout range from 0 to 9999.

• How are setup parameters retained during an AC line power failure?

  Operating setpoints and current count totals are saved continuously to internal non-volatile EEPROM memory without requiring battery maintenance.

• What control output mechanism is provided by the H7CX-A4-N?

  It provides an electromechanical relay contact output rated up to 250 VAC or 30 VDC at 3 A under resistive loads.

• Can the input terminals accept both NPN and PNP sensor signals?

  Yes, the input circuit supports both NPN open-collector and PNP sensor switching, configurable via internal setup modes.

• What ambient temperature limits apply to cabinet installation?

  The instrument is specified to operate within rated measurement tolerances in cabinet ambient temperatures ranging from -10 to 55 deg C.

• What cutout size is necessary for flush panel mounting?

  The instrument requires a standard square DIN cutout measuring 45 x 45 mm for flush front-panel enclosure integration.