Designing Power and Communication Redundancy
Design control-system redundancy by mapping shared dependencies, separating power and network paths, defining failover behavior, exposing degraded operation, and proof-testing every tolerated fault.
Manufacturer: Omron
Product No.: H7CX-A4WSD-N
Country of origin:Japan
Product Type: Multifunction Counters
Payment: T/T, Western Union
Weight: 2000g
Dimensions: 10.0 cm x 8.0 cm x 8.0 cm
Shipping port: Xiamen
Warranty: 12 months
Operational efficiency in industrial staging and counting is optimized by the Omron H7CX-A4WSD-N, a highly configurable 4-digit multifunction digital counter and tachometer designed for precise automation control. This unit features a dual-stage transistor preset configuration and operates on low-voltage DC power, making it an excellent fit for dynamic control systems requiring rapid switching times and reliable visual feedback. Featuring a negative transmissive LCD with programmable color-change alerts, operators can instantly verify process status from a distance.
| Parameter | Specification |
|---|---|
| Manufacturer | Omron Industrial Automation |
| Model Number | H7CX-A4WSD-N |
| Supply Voltage | 12 to 24 VDC (allowable ripple: 20% max.) |
| Power Consumption | Approx. 3.3 W at 24 VDC |
| Number of Digits | 4 digits (-999 to 9999) |
| Configuration | 2-stage setting |
| Output Type | Transistor output (NPN/PNP open collector, 30 VDC max., 100 mA max.) |
| Max. Counting Speed | 30 Hz or 5 kHz (selectable; minimum pulse width 16.7 ms or 0.1 ms) |
| Memory Backup | EEPROM (100,000 overwrites min., 10-year data retention) |
| Connection Method | M3.5 Screw terminals |
| Ambient Operating Temperature | -10 to 55 degC (with no icing or condensation) |
| Country of Origin | Japan |
| Shipping Weight (Calculated) | 0.25 kg |
| Package Dimensions (Calculated) | 10.0 cm x 8.0 cm x 8.0 cm |
The Omron H7CX-A4WSD-N is the direct, updated replacement for the legacy H7CX-A4WSD (non-N suffix) model. This updated variant features a significantly shorter housing depth (59 mm compared to 78 mm), making it highly compatible with modern, space-constrained enclosures. Existing wiring configurations and terminal designations remain identical, facilitating a seamless drop-in replacement process.
The integrated transistor control outputs are rated strictly for DC operations (30 VDC, 100 mA maximum). Connecting AC inductive loads directly to these terminals will result in permanent semiconductor failure. When driving external DC relays or solenoid coils, an external flyback diode must be installed across the load to suppress back-EMF spikes. Additionally, the unit is rated for 12 to 24 VDC; verify that power supply ripple does not exceed 20% to prevent erratic display behavior or micro-reset events.
Always configure the input mode setting (sinking vs. sourcing) in the function parameter menu prior to connecting your sensors. An incorrect input logic configuration will prevent the unit from registering input pulses even if the physical sensor is functioning correctly. To minimize high-frequency electromagnetic interference, route all signal input lines (CP1, CP2, and Reset) in a separate grounded metal conduit away from high-current AC power cables.
CRITICAL WARNING
Isolate and lock out all external power sources before executing terminal connections. Operating or servicing this instrument while power is applied poses a risk of electrical shock and potential damage to internal logic circuits. Allow any residual system capacitance to discharge completely before starting work.
Prepare a standard DIN 48 x 48 mm panel cutout. Insert the counter unit through the panel front and secure it tightly using the provided mounting adapter from the rear.
Perform terminal wiring utilizing M3.5 crimp terminals. Ensure the DC power connections are made to the designated positive and negative terminal positions with correct polarity.
Apply input power and access the parameter settings menu to verify the desired configuration mode (Counter vs. Tachometer) and input speed limit (30 Hz/5 kHz) match system constraints.
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Returns & Warranty

Global Express Shipping
Returns & Warranty
Orders are processed and delivered Monday-Friday (excluding public holidays).
For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .
| Country of origin |
Japan
|