Siemens SIMATIC RTLS System Manual page 183

Pin
3
4
P1 connector
The individual pins are connected to the solder contacts (P4).
Type: JST SM04B-SRSS-TB
Pin
1
2
3
4
P2 connector
Internal interface for production and manufacturing test, do not use.
7.8.1.3 LED status indicator
The operating states of the gateways are indicated by the LEDs. The states can be off , on
and flashing .
LED
7.8.1.4 Dimension drawing
The antenna is connected to the PCB via a 5 cm long U.FL cable. The contacts used are P3 on
the PCB and P1 on the antenna.
System Manual, 04/2019, C79000-G8976-C577-01
Description / Function
Tx - Output on transponder, 2.5 V
Supply voltage, 3.3 V ±100 mV
Description / Function
Rx - Input on the transponder, 2.5 V (3.3 V)
Tx - Output on transponder, 2.5 V
Grounding
Supply voltage, VCC, 3.3 V ±100 mV
Meaning
Lights up briefly when radio is active
Is off when the transponder is inactive
7.8 SIMATIC RTLS PCB OEM CHIRP
Transponder
183