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September 08, 2026 6 min read
Operating manual for the FIBARO Wall Plug (Type B) with USB charger, model FGWPB-121, covering power/energy metering, associations, and advanced parameters.
Operating manual for the FIBARO Wall Plug (Type B) with USB charger, model FGWPB-121 — a Z-Wave Plus smart plug with power/energy metering, a status LED frame, and a USB charging port.
Read this manual before installing the device. For indoor, dry-location use only — do not use in damp or wet locations, near a bathtub, sink, shower, or pool. To avoid electrical shock, never operate the device with wet or moist hands. Not a toy — keep away from children and animals.
The FIBARO Wall Plug is a remotely controlled plug-in switch that measures power and energy consumption for whatever's plugged into it, plus its built-in USB charging port. A multi-color LED frame visualizes the current load and operating mode.
LED color at power-up indicates network status: Green = already added to a Z-Wave network; Red = not added.
Adding (Inclusion): Plug in near the controller (red LED = not added), set the controller to add mode, triple-click the button. If adding in S2 authenticated mode, enter the device PIN code (the underlined part of the public key on the device/manual). Success is confirmed by the controller's message.
Removing (Exclusion): Plug in (green LED = currently added), set the controller to remove mode, triple-click the button. Removing restores all default parameters.
Button actions: 1 click = turn controlled device ON/OFF (or confirm a menu selection); 3 clicks = add/remove from Z-Wave network; hold = enter/navigate the menu.
LED frame indications:
Using the menu: Press and hold the button; wait for the LED to show the desired position (Green = erase energy memory, Violet = Z-Wave range test, Yellow = device reset); release the button; click to confirm.
Disabling the LED frame: Plug in, hold the button ~3 seconds, release once the LED starts pulsing white. Repeat to restore. Note: disabling the LED also disables alarm signaling via LED.
Factory reset: Hold the button until the LED glows yellow (3rd menu position), release, click once to confirm. The device restarts with factory defaults (signaled by red LED). Not the recommended way to remove from a network — use only if the primary controller is missing/inoperable.
The Wall Plug measures active power and energy consumption with micro-controller precision (±1% for loads over 5W), reporting per parameters 11–15. For loads under 5W, power is reported for every 0.2W change; the USB port doesn't report loads under 0.4W. Active power is measured in Watts (W); energy consumed over time is measured in kilowatt-hours (kWh).
Resetting consumption memory: Hold the button, release when the LED glows green (1st menu position), then briefly press the button again. (Power cycling or unplugging does NOT erase consumption data.)
| 1st – Lifeline | Reports device status (root, endpoint 1 & 2); single device only, reserved for the controller |
| 2nd – On/Off (Button) | Devices switch ON/OFF when relay state changes via the button (Basic command class). Sent only for manual button operation. |
| 3rd – On/Off (Plug power) | Devices switch ON/OFF automatically based on the plugged device's current load, per parameters 21–27. |
Groups 2 & 3 support up to 5 regular/multichannel devices each; Lifeline supports 1. To add: open device options → Advanced tab → "Setting Association" → choose group and devices → save.
The device includes a built-in controller range tester (device must already be added to the network; use sparingly as testing stresses the network). Hold the button until LED glows violet (2nd menu position), release, click to confirm; the LED then indicates range status. Press briefly to exit.
| Pulsing green | Attempting direct communication with controller |
| Glowing green | Direct communication established |
| Pulsing yellow | Attempting routed communication via repeaters |
| Glowing yellow | Communicating via repeaters (retries direct after 2 sec) |
| Pulsing violet | At maximum Z-Wave range — not recommended for regular use |
| Glowing red | Cannot connect to the controller directly or via a repeater |
Endpoint 1 (main socket): GENERIC_TYPE_SWITCH_BINARY / SPECIFIC_TYPE_POWER_SWITCH_BINARY — turns the connected device on/off and measures its power/energy. Endpoint 2 (USB port): GENERIC_TYPE_METER / SPECIFIC_TYPE_SIMPLE_METER — measures USB power/energy.
Supported Command Classes: ZWAVEPLUS_INFO, SWITCH_BINARY, ASSOCIATION, MULTI_CHANNEL_ASSOCIATION, ASSOCIATION_GRP_INFO, TRANSPORT_SERVICE, VERSION, MANUFACTURER_SPECIFIC, DEVICE_RESET_LOCALLY, POWERLEVEL, SECURITY, SECURITY_2, SUPERVISION, METER, APPLICATION_STATUS, CONFIGURATION, CRC_16_ENCAP, NOTIFICATION, PROTECTION, FIRMWARE_UPDATE_MD, MULTI_CHANNEL, BASIC (most secured).
Notification events: Power Management — Over-load detected (0x08), Over-current detected (0x06); System — Hardware Failure with Device overheat parameter.
Protection CC: Local protection can disable button control while leaving menu access; RF protection can reject BASIC/SWITCH_BINARY commands while other command classes still function.
Meter CC: Reports Electric kWh (Import, precision 2, size 4) and Electric W (Import, precision 1, size 2) for root, endpoint 1, and endpoint 2.
| #2 Restore state after power failure | 0=stay off, 1=restore previous state. Default 1. |
| #3 Overload safety switch | 0=inactive, or 10–18000 (1.0–1800.0W) power threshold to auto shut-off. Default 0. |
| #11 Power reporting threshold | 0=off, or 1–100% change to trigger a report. Default 15%. |
| #12 Energy reporting threshold | 0=off, or 1–500 (0.01–5kWh). Default 0.1kWh. |
| #13 Periodic power reporting | 0=off, or 30–32400 sec. Default 3600s (1hr). |
| #14 Periodic energy reporting | 0=off, or 30–32400 sec. Default 3600s (1hr). |
| #15 Include self-consumption in metering | 0=off, 1=on. Default 0. |
| #21/#22 UP/DOWN power thresholds (group 3) | Default 50W (UP) / 30W (DOWN) |
| #23 Group 3 control mode | 1=send on UP threshold only, 2=DOWN only, 3=both. Default 3. |
| #24/#25 Group 2 ON/OFF values | 0–99 or 255. Default 255 (ON) / 0 (OFF). |
| #26/#27 Group 3 threshold ON/OFF values | 0–99 or 255. Default 255 / 0. |
| #30 Active alarms | Bitmask: 1=general, 2=smoke, 4=CO, 8=CO2, 16=high temp, 32=flood. Default 63 (all). |
| #31 Alarm response | 0=none, 1=turn on, 2=turn off, 5–50=cyclic toggling (0.5–5.0s). Default 0. |
| #32 Alarm state duration | 1–32400 sec. Default 600s (10 min). |
| #40 Violet color power threshold | 1000–18000 (100–1800W). Default 1800W. |
| #41 LED color when ON | 0=off, 1=smooth power-based, 2=stepped power-based, 3–9=fixed color. Default 1. |
| #42 LED color when OFF | 0=off, 1=last measured power color, 3–9=fixed color. Default 0. |
| #43 LED color on Z-Wave alarm | 0=off, 1=no change, 2=flash red/blue/white, 3–9=fixed color. Default 2. |
| Power Supply | 120V AC, 50/60Hz |
| Rated Load | Resistive: 15A; Incandescent: 8A; Inductive (cosφ 0.75–0.8): 15A; Pilot duty (cosφ <0.35): 360VA; Motor: 373W; Electronic ballasts: 3A |
| Rated Impulse Voltage | 1.5kV |
| Max Inrush Current | 80A (20ms) |
| Socket Type | Type B / NEMA 5-15, max 15A load |
| ICE Protection Class | Class I |
| Active Element | Micro-gap relay switch |
| USB Output | 5V / 1A |
| Radio Protocol | Z-Wave (500 series chip) |
| Radio Frequency | 908.4, 908.42, or 916.0 MHz |
| Range | Up to 50m outdoors, 40m indoors |
| Operating Temperature | 32–104°F |
| Dimensions (H x W x D) | 2.3 x 2.3 x 2 in |
Complies with Part 15 of the FCC Rules (Class B digital device) and Industry Canada license-exempt RSS standards. Unauthorized changes/modifications can void the user's authority to operate the equipment. Safety classification: home and office use only; Type 1 action per UL 60730-1 clause 6.4.1; Software Class A device per UL 60730-1.
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