User Manual and Installer Instructions for RFID Reader 4.683-250.0
1. Introduction
This RFID reader is designed for reading authorization codes for floor cleaning appliances
from tags on user keys which can be inserted into a key receptacle in the control panel of the
floor cleaning appliance. The keys and the key receptacle use a design which was
specifically developed for Kärcher floor cleaning appliances.
2. Characterstics
Transmitter frequency: 13.56 MHz
Input voltage: 3.3 V
Input current: 0.3 A
Operating temperature: -10°C to +70°C
Dimension of the PCB: 61 mm x 52 mm
RF chip: NXP PN5120A0HN1/C1
Quartz oscillator: 27.12 MHz
Data buffer: 64 Byte
Connector (power/communication): Pin 4, 5 (UART interface)
Pin 1, 6 (power connection)
Pin 2 (interrupt handling)
Pin 3 (NRSTPD interface)
Antenna: Printed antenna on the reader module PCB,
no external antenna connector
3. Compliance information
The module complies with the following standards:
• FCC 47 CFR Part 15 Radio Frequency Devices (Subpart C)
• RSS-210, Issue 10 (2019-12) Licence-Exempt Apparatus: Category I Equipment
• RSS-Gen, Issue 5 (2018-04) General Requirements for Compliance of Radio
Apparatus
4. Module integration instructions
The RFID module 4.683-250.0 is foreseen for installation in the control panel of Kärcher floor
cleaning appliances. The RFID reader is connected to the HMI module in the control panel,
which supplies 3.3 V DC voltage to the RFID reader.
This device is intended only for integration under the following conditions: (I) The module
with the PCB antenna must be installed such that 20 cm is maintained between the antenna
and users. (II) The transmitter must not be co-located or operating in conjunction with any
other transmitter or antenna. (III) The module shall be only used with the internal antenna on
the module PCB that has been originally tested.
Changes or modifications made to the equipment not explicitly approved by Alfred Kärcher
SE & Co. KG may void the FCC / IC authorization to operate this equipment.