ZOOZ 700 Series Z-Wave In-Wall Review: Specs, Pros and Cons
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This zooz 700 series z wave long review covers the ZEN51 smart relay. It is a compact in-wall device designed for on/off control. The unit measures 1.5 x 1.4 x 0.7 inches, fitting into tight electrical boxes. Two specs define its core capability: Z-Wave Long Range connectivity and 3-way circuit compatibility. It requires a neutral wire for installation. You install it behind existing switches or at the light fixture. This allows you to keep your preferred switch style while adding automation. The relay supports dry contact outputs for various applications beyond simple lighting.
What stands out
- Z-Wave Long Range and S2 authenticated security for reliable communication.
- 3-way compatible for use in multi-switch setups without neutral at every box.
- Compact 1.5 x 1.4 x 0.7 inch size fits crowded electrical boxes.
- Smart bulb mode prevents cutting power to smart bulbs when off.
- Dry contact output allows use for sump pumps or motion lights.
Who it fits
Good fit for
You should choose this relay if you have a Z-Wave hub that supports Long Range and S2 security. It suits homeowners who want to automate existing switches without replacing them. The 3-way capability makes it ideal for staircases or large rooms. You will also appreciate it if you need a dry contact output for non-lighting devices like sump pumps. The compact size ensures it fits even in tight junction boxes. This device is best for users who already have a neutral wire available at the switch location.
Who should skip it
Skip this product if your switch box lacks a neutral wire and you cannot access neutral at the light fixture. It requires 120 V input, so it is not suitable for low-voltage or dry contact input devices. You must also have a compatible Z-Wave hub, as older hubs may not display its advanced features correctly. Do not use this with dimmers or electronic smart switches, as it only works with mechanical on/off switches. If you need a dimmer, consider the ZEN54 option instead. This is strictly an on/off relay.
Verdict: The ZEN51 is a versatile, compact relay for Z-Wave networks requiring long-range reliability. It fits well in existing setups where neutral is available and 3-way control is needed.
Key specs explained
Connectivity: Z-Wave, Z-Wave Long Range
This device uses the Z-Wave mesh network for reliable communication. The Long Range feature extends signal distance through walls and floors. You benefit from stronger connectivity in large homes without needing many repeaters. Compare this with Wi-Fi devices that congest your network. It ensures your switch stays online even when other smart home traffic is heavy.
Circuit Type: 3-Way
You can use this relay in multi-switch setups where two switches control one light. It replaces one switch in a 3-way circuit while keeping the other mechanical. This allows automation without rewiring your existing home. Check your current wiring before buying. It fits standard residential lighting circuits and integrates seamlessly with your existing switch layout.
Wiring Requirement: Neutral Required
This unit needs a neutral wire to operate. Most modern electrical boxes have one, but older homes might not. If your box lacks a neutral wire, you must install the relay at the light fixture instead. This is a critical check before purchase. It ensures stable power for the Z-Wave radio. Always verify your box contents to avoid installation failure.
Switch Function: On/Off Switch
This relay controls lights by toggling power on or off. It does not dim brightness. You keep your existing wall switch style while adding smart control. It works with smart bulbs to prevent them from losing connectivity when turned off at the wall. Compare this with dimmer switches if you need variable lighting levels.
Smart Home Compatibility: SmartThings, Hubitat, Home Assistant
The device works with major home automation platforms. You need a Z-Wave hub to connect it. This list confirms broad software support. You can choose your preferred ecosystem without worrying about compatibility. It integrates with existing routines and scenes. Verify your hub supports Z-Wave Long Range for full feature access. This flexibility protects your investment as you upgrade other devices.
Compact Design and Build Specs
According to the listing, the Zooz ZEN51 is a compact in-wall smart relay. Its physical dimensions are 1.5 inches in length, 1.4 inches in width, and 0.7 inches in height. These small measurements allow the unit to fit into tight electrical boxes behind existing wall switches. The device is designed to install directly behind your current mechanical on/off or momentary switches. This layout lets you keep your preferred switch style and color while adding smart automation. You do not need to replace the entire switch faceplate, which simplifies the upgrade process for your home.
The relay output provides a dry contact, making it suitable for unique applications beyond standard lighting. The input side requires a 120 V signal, which is ideal for monitoring devices like sump pumps or motion lights. The listing notes that this unit is ETL certified and conforms with North American safety standards. This certification indicates that the build meets specific safety requirements for electrical devices in residential settings. You should always follow the provided wiring diagrams carefully during installation.
This compact design supports 3-way setups, a feature not found in many other smart relays. Even if neutral wires are unavailable at your switch boxes, you can install the relay at the light fixture where power and neutral are accessible. The small form factor ensures it remains hidden within the wall structure. This keeps your home’s aesthetic unchanged while providing reliable Z-Wave control. The build prioritizes discreet integration into existing electrical infrastructure.
Setup And Everyday Use Guide
Installation begins by connecting the relay behind your existing wall switch or directly at the light fixture. The unit requires a neutral wire, so you must verify your electrical box has one before starting. The device features pigtail wires for straightforward connections. You can only connect it to mechanical on/off or momentary switches. Do not use dimmers or electronic smart switches as the input source. The relay output provides dry contact, which allows you to monitor 120 V signals on devices like sump pumps or motion lights. For dry contact input needs, the ZEN16 model is the appropriate alternative.
This relay supports 3-way setups, offering flexibility if you have multiple switches controlling the same light. Even without neutral at the switch boxes, you can install the unit at the light fixture where power and neutral are available. Always follow the provided wiring diagrams and adjust programming settings if necessary.
For daily use, the Smart Bulb Mode lets you control smart bulbs via Z-Wave without cutting power when off. This restores full functionality to your physical switches. The device requires an updated Z-Wave hub to display correctly. It works well with Hubitat, Home Assistant, and SmartThings. The Z-Box Hub is recommended for optimal performance. Security is handled by S2 authenticated protocols. You benefit from Z-Wave Long Range and SmartStart features, provided your hub supports them. The unit is ETL certified for North American safety standards.
Check Compatibility Before Buying
Before you install the Zooz ZEN51, verify your home automation ecosystem supports Z-Wave Long Range and S2 authenticated security. Not all hubs display advanced features correctly. The device requires a compatible Z-Wave hub to function. It works best with Z-Box, Hubitat, Home Assistant, HomeSeer, and SmartThings. Check your hub’s firmware updates to ensure full compatibility. You must also confirm your electrical boxes contain a neutral wire. The relay needs this connection for stable operation. If your switches lack neutral, you may need to route wires to the light fixture instead. This unit controls on/off states only. It does not dim lights. Ensure your existing mechanical switches are compatible. Do not connect dimmers or electronic switches to the input. The dry contact output allows monitoring of devices like sump pumps. Keep your hub software updated for optimal Z-Wave performance. This relay integrates well into broader smart home setups, complementing other Z-Wave devices for reliable automation without complex wiring changes.
Check before you buy
- Confirm your Z-Wave hub supports Long Range and S2 security.
- Verify electrical boxes have a neutral wire available.
- Ensure existing switches are mechanical, not dimmers or smart.
- Check that your hub software is fully updated.
The product at a glance
Zooz 700 Series Z-Wave In-Wall Smart Relay
Best for: automating 3-way switch setups with long-range Z-Wave
- Smart Home Compatibility
- SmartThings, Hubitat, Home Assistant
- Hub Requirement
- Hub Required
- Connectivity
- Z-Wave, Z-Wave Long Range
- Wiring Requirement
- Neutral Required
- Circuit Type
- 3-Way
- Switch Function
- On/Off Switch
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The Zooz ZEN51 is a compact in-wall smart relay that adds Z-Wave control to existing switches. It supports Z-Wave Long Range and 3-way setups. The unit requires a neutral wire and a compatible hub. It fits behind wall switches or at light fixtures. This device keeps your current switch style while enabling automation for on/off control.
Pros
- Supports Z-Wave Long Range for better connectivity
- Enables 3-way switch configurations
- Compact size of 1.5 x 1.4 x 0.7 inches
- Smart Bulb Mode prevents power cutoff
Cons
- Requires a neutral wire for installation
- Does not support dimming functions
- Needs a compatible Z-Wave hub to operate
Good fit if
- You need to automate 3-way switch setups
- You want to keep your existing switch style
- You have a neutral wire available at the switch box
Skip if
- You require dimming capabilities for your lights
- You do not have a neutral wire in your switch box
- You prefer standalone switches without a hub
Verdict: The Zooz ZEN51 Z-Wave Smart Relay is a practical solution for users who need reliable on/off automation with long-range Z-Wave support. It is ideal for those maintaining traditional switch aesthetics while integrating smart home features.
Specifications side by side
| Spec | Zooz 700 Series Z-Wave In-Wall Smart Relay |
|---|---|
| Smart Home Compatibility | SmartThings, Hubitat, Home Assistant |
| Hub Requirement | Hub Required |
| Connectivity | Z-Wave, Z-Wave Long Range |
| Wiring Requirement | Neutral Required |
| Circuit Type | 3-Way |
| Switch Function | On/Off Switch |
| Dimensions | 1.5 × 1.4 × 0.7 inches |
| Model | ZEN51 |
Frequently asked questions
Does the Zooz ZEN51 work with SmartThings?
Yes, the device lists SmartThings as a compatible platform. You can integrate it into your existing SmartThings ecosystem for automation. This ensures your switches respond to routines and scenes within that specific hub environment.
Is a hub required for this Z-Wave relay?
Yes, a Z-Wave hub is required for operation. The specifications explicitly state a hub is needed to manage the device. It does not connect directly to Wi-Fi or Bluetooth, so you must have a compatible central controller.
What are the exact dimensions of the ZEN51?
The unit measures 1.5 inches in length, 1.4 inches in width, and 0.7 inches in height. These compact dimensions allow it to fit into standard electrical boxes. The small footprint helps it tuck away neatly behind your wall plate.
Can this relay handle 3-way switch setups?
Yes, the product is best for automating 3-way switch setups. It is designed to work in configurations where multiple switches control the same light. This makes it suitable for hallways or staircases where traditional 3-way wiring is present.
Does it support Home Assistant integration?
Yes, Home Assistant is listed as a compatible smart home platform. You can add the relay to your Home Assistant instance for local control. This supports users who prefer open-source automation systems over proprietary cloud services.
Is the ZOOZ ZEN51 suitable for long-range Z-Wave networks?
Yes, it supports long-range Z-Wave communication. This feature helps extend the mesh network range through walls and floors. You benefit from more reliable connections in larger homes without needing as many repeaters to maintain signal strength.