User Manual

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Siemens TX-I/O Engineering and installation guide CM110562en_13
Building Technologies Safety guidelines 2019-05-15
Principles diagram: Connection of the field devices to the I/O modules
A Power supply module
B I/O modules
C Field devices with SELV/PELV circuits only
D Field devices with mains voltage and SELV/PELV circuits
E Field devices with mains voltage circuits only
F
Double or reinforced insulation to EN 60 630,
test voltage AC 3750 V
2.4.4 Connection of a PC (tool) to a P-bus BIM
The USB interface of the P-Bus BIM incorporates a safety circuit to prevent the transfer
of hazardous voltages to the PC. Earthing: see page 42.
At the same time, the PC is protected against incorrect voltages up to 24 V from the I/O
island.
Key