Grundfos Holding A/S
SCALA1 Module Integration Guide Version 1.0.1
Introduction
The module allows wireless control of the SCALA1 host product
Purpose
The module is the user interface (UI) of the host product via Bluetooth Low Energy (BLE). The
module communicated with a smartphone with a “Grundfos Go” app installed.
Use conditions
The SCALA1 module may only be used inside a Grundfos host product.
The host product must provide an IP X4 or better enclosure to keep ingress of water away from
the module.
Module Description
The module is self-contained with buffered in- and output, regulated voltage, onboard integrated
antenna, RF shielding of the radio parts (except antenna).
• Voltage supply is: 115 Vac, 60 Hz
o Internally regulated Vss: 3 – 8 Vdc, nominel 5 Vdc
• Current draw Vss is: 250 mA max, 60 mA nominel
• Temperature range is: 0 – 55 degrees Celcius
• Communication, wired RS-485 115 kBaud
• Radio air interface BLE – Bluetooth Low Energy
o Frequency Band: 2.4 GHz ISM
o Frequency of Operation:2400 – 2483.5 MHz
o Antenna Gain: 0 dBi (Integrated F-type antenna)
o Type of Modulation: GFSK
o Emission Designation : F1D / G1D
o Transmit Power (EIRP): 5 ±0.1 dBm
o Bandwidth: 1 MHz
o Channel Spacing: 2 MHz
o Bluetooth Version: 4.2
The module complies to all 8 requirements of the FCC modular approval rules:
• Compliance:
Yes or No along with a justification
• The radio elements must have the
radio frequency circuitry shielded.
Physical components and tuning
capacitor(s) may be located
external to the shield, but must be
• Physical shield box covers all RF parts
except the F-antenna.
• Peripheral interface parts are not
shielded
• The module must have buffered
modulation/data inputs to ensure
that the device will comply with
Part 15 requirements with any type
• The transceiver has buffered data
input / output ports.
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