01
Remote control
ON/OFF control from the GEYER Smart app, wherever you are.
GEYER SMART · ER120WM
Smart controlstarts at the panel.
Smart Wi-Fi relay with energy metering for remote control, scheduling and monitoring through the GEYER Smart app.
20 Aat 250 VAC
Wi-Fi2.4 GHz
1 moduleon DIN rail
Energy meteringthrough GEYER Smart
DIN 35 mm1-module width
CONNECTED ECOSYSTEM
Amazon Alexa
Google Home
Tuya Smart
Smart LifeCONTROL · AUTOMATION · ENERGY
One device. Multiple possibilities.
The essential functions you need, brought together in one app.
02
Smart scheduling
Schedules by hour, day or week, countdown and astronomical scheduling.
03
Energy metering
Monitor daily, monthly and total energy, current, power and voltage.
04
External push-button
Local operation with a momentary push-button connected to terminals 3 and 4.
COMPACT SIZE · COMPLETE CAPABILITY
One module in the panel. Full control in the app.
GEYER SMART APP
Control in your hand.
Switch the relay on or off, create schedules, view measurements and share the device with up to 20 users.
Live controlDevice status
EnergyV · mA · W · kWh
APPLICATIONS
Smart management for everyday life.
01
WATER HEATER
Remote operation and scheduling.
02
LIGHTING
Automatic switching based on schedules.
03
ELECTRICAL APPLIANCES
Central control of compatible loads from the electrical panel.
04
AUTOMATIC IRRIGATION
Scheduled operation for everyday needs.
Every application is subject to the contact rating and the installer's assessment of the load.
TECHNICAL SPECIFICATIONS
Designed for the electrical panel.
Single-channel, one-module relay with neutral and an external momentary push-button for local control.
CERoHS2-year warranty
Input voltage100–240 VAC
Frequency50–60 Hz
Contact1NO, 20 A at 250 VAC, cosφ = 1
Wi-Fi2.4 GHz
BluetoothYes
Mounting35 mm DIN rail, 1 module
Dimensions70.5 × 17.5 × 86.5 mm
Operating temperature−10 °C to +65 °C
Warranty2 years
ComplianceCE, RoHS
INSTALLATION & PAIRING
Ready in three essential steps.
01
Installation
Mount on a 35 mm DIN rail and complete the electrical connection exclusively through a licensed electrician.
02
App
Download GEYER Smart and connect the phone to a 2.4 GHz Wi-Fi network.
03
Pairing
Press and hold the key for about 5 seconds until the indicator LED flashes, then add the device.
!
ELECTRICAL SAFETYInstallation and connection must be performed with the power isolated and in accordance with applicable regulations.
WIRING DIAGRAM
Clear wiring. External control.
Supply from the upper terminals, output to the load from the lower terminals, and optional momentary push-button on terminals 3 and 4.
FREQUENTLY ASKED QUESTIONS
The essential answers.
Which app does the ER120WM use?+
The official app is GEYER Smart and is available for Android and iOS.
Does it work with 5 GHz Wi-Fi?+
The ER120WM connects to 2.4 GHz Wi-Fi.
Do schedules work without Internet?+
No. Schedules require an Internet connection and access to the cloud server.
Why is energy consumption shown as zero?+
Loads below 3 W are not measured and the app displays zero consumption.
Who should install the device?+
Installation and electrical connection must be carried out exclusively by a licensed electrician.
VIDEO
Product videos.
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Video content coming soon
TESTIMONIALS
Everyday experiences with ER120WM.
Everyday use cases based on the functions and applications of ER120WM.
01“
Weekly scheduling helps me switch the water heater on only when I need it, even when I am away from home.
Maria P. · HomeownerEveryday scheduling
02“
I tested it to measure consumption in my Airbnb. Energy metering lets me see exactly how much electricity is used. Very convenient!
Nikos D. · Small accommodation managerRemote control
03“
Its quick panel installation and the option for an external push-button make ER120WM a very practical choice for water-heater control.
Andreas K. · Electrical installerInstallation and local control
ER120WM DOCUMENTATION