Siemens SIMATIC RTLS System Manual page 190

Transponder
7.9 SIMATIC RTLS PCB OEM PULSE
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.
7.9.1.3 LED status indicator
The operating states of the transponder are indicated by the LEDs. The states can be off ,
on
LED
7.9.1.4 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.
190
Description / Function
Tx - Output on the transponder, 3.3 V
Supply voltage 3.3 V
Description / Function
Rx - Input on the transponder, 3.3 V
Tx - Output on the transponder, 3.3 V
Grounding
Supply voltage, VCC, 3.3 V ±100 mV
and flashing .
Meaning
Lights up briefly when radio is active
Is off when the transponder is inactive
System Manual, 04/2019, C79000-G8976-C577-01