Zooz Dry Contact Relay | ZEN51 | Z-Wave Plus 700 EU Series

The Zooz ZEN51 is a flush-mounted micro-module with a true dry contact output (IN/OUT galvanically isolated) and Z-Wave control. The device itself is powered by 120–240 V AC and switches resistive loads up to 10 A; typical limits are 960 W incandescent and 150 W LED. The module fits behind an existing wall switch or at the luminaire and supports scene control, SmartStart, and S2 protection. Please note: the external switch input of the ZEN51 requires mains voltage according to the manufacturer's FAQ; for pure low-voltage control via dry inputs, ZEN16/ZEN17 are more suitable.

Key features and benefits:

• True dry-contact output (IN/OUT) for safe switching of floating circuits or separated mains loads.
• 230 V usable, up to 10 A resistive; guide values ​​960 W incandescent lamps and 150 W LED.
• Z‑Wave with S2 protection and SmartStart; compact size with pigtail wires for quick installation.
• Scene Control and Smart Bulb Mode available via parameters for advanced automation.

Compatibility:

• Works with Home Assistant (Z‑Wave JS), Fibaro, Homey, Hubitat, SmartThings; full functionality may require a specific driver.
• EU frequency 868 MHz

Disadvantage:

• The wired switch input is not a dry contact (expects mains voltage); for low-voltage triggers use ZEN16/ZEN17.

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