Pilz PSS Series Operating Manual page 28

Tests/Measurements
The bus topology must be taken into account in the measurement:
• Main line without stub lines
The PSS SB TESTER is connected to one end of the bus line. The
terminating resistors at both ends of the bus line must be removed.
Fig. 5-3: Main line without stub lines
5-10
Measured cable runs
Remove
terminating resistor
Bus
subscribers
Remove
terminating resistor
Operating Manual: PSS SB TESTER