The ZEN57 XS Relay is a unique, compact 240V Z-Wave relay, designed for tight electrical boxes where standard-size relays simply don’t fit. Whether you're outfitting a single-pole switch or upgrading a junction-box-based fixture, the ZEN57 offers a flexible, reliable solution for 120V and 240V control.

An Important Note About ZEN57 240V XS Relay Compatibility in the U.S.

The ZEN57 XS Relay is a compact Z-Wave relay designed for lighting and low-load control applications. It supports both 120V and 240V AC power input and offers a wet contact output and dry contact input, which is important to understand for safe installation and use.

Load Capacity Disclaimer

The ZEN57 is rated for a maximum of 5A, which is significantly lower than what is typically found on U.S. 240V circuits like dryers, water heaters, pumps, or other high-power appliances.

Do not use the ZEN57 to control high-current 240V loads. Exceeding the 5A rating may permanently damage the device.

This product is not intended for use with motors, pumps, or inductive loads over 1/4 HP or 5A.

Power Source and Output Behavior

The relay output is a wet contact. This means the voltage supplied to the input (L terminal) will also be passed through to the OUT terminal when the relay is on.

• If you supply 120V AC to the L terminal, you'll see 120V AC at the OUT terminal when the relay is on.

• If powered by 240V AC, the same 240V will appear at the output.

The switch input (yellow and brown pigtails) is a dry contact only. These wires must never carry voltage and should only be used with mechanical switches or dry contact sensors for input triggering.

U.S. Installation Notes

For standard 120V lighting applications, a neutral wire is required.

Using the ZEN57 on a 240V circuit in the U.S. should only be considered when the load is well within the 5A rating.

Always confirm the actual load draw before installation.

Recommended Use Cases

• Lighting control for low-wattage 120V fixtures

• Monitoring dry contact inputs from push buttons or switches

• Smart control of another relay coil or low-voltage control signal

• Any application where a wet contact output and dry contact input are needed in one compact module

Not Recommended For

• High-power 240V loads

• Inductive or motor loads above 1/4 HP

• Any application where the load exceeds 5A continuous

Product Overview

Model: ZEN57 XS Relay
Power Source: 100-240VAC 50/60Hz
Relay Type: Wet Contact
Switch Type: Dry Contact (via pigtail wires)
Terminals: Block terminals (screw-style)
Form Factor: Extra small – significantly smaller than the ZEN51

Load Ratings

Voltage	Resistive Load	Incandescent	LED Bulbs
120V	5A	500W	150W
240V	5A	1000W	300W

Recommended Use Cases

• Tight Switch Boxes: Ideal for shallow or crowded wall boxes where the ZEN51 is too large.

• Behind a Mechanical Switch: Perfect for single-pole installations when load and power are in the same box.

• At the Light Fixture: Suitable for direct installation at the fixture junction box.

• Multi-Switch Configurations: Can be used with regular or momentary switches wired in series, but only if the line and load are in the same box.

🚫 Not Recommended For:

• Multi-way installations with load and line in separate boxes

• Applications exceeding the listed load ratings. Since the ZEN57 has a 5A relay, it cannot be used with inductive loads like motors, fans, or pumps.

Z-Wave Hub Integration

• Displays as: On/Off switch

• Advanced Features:

  • Use parameters to separate input (switch) from output (relay)

  • Create a child device using Notification Command Class (same method as ZEN16/17)

Physical Characteristics

• Screw-type block terminals 

• 2 pigtail wires for the dry contact switch input

• Smaller footprint than the ZEN51 — fits easily in switch boxes that other relays can’t

ZEN57 vs. ZEN51 Comparison

Feature	ZEN57	ZEN51
Power Source	100-240VAC only	120-240 VAC
Relay Type	Wet Contact (Output carries line voltage)	Dry Contact (No voltage on relay)
Switch Input	Dry Contact (pigtail, no voltage)	Voltage Input via pigtail (S)
Size	Extra Small – ideal for tight boxes	Medium size – requires more space
Multi-Switch Use	Line & load must be in same box	More flexible due to dry contact relay
Install at Fixture	✅ Yes	✅ Yes
Hub Display	On/Off switch + optional child device	On/Off switch + optional child device
Terminals	Block (screw) terminals	Pigtail leads

Installation Notes

• Always follow electrical code and safety procedures.

• Use in dry locations only.

• The ZEN57 should not be used with loads exceeding its rated capacity.

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