KPM PROCESS SENSORS PSC-S55N Operation Manual page 27

PSC-55 Pyrometer Series Operation Manual
D-
D+
GND
Interface module
RS-485 <=> USB
3310A14020
Pyrometer
Pyrometer
Adresse 01
Address 01
Wiring configuration of a linear RS-485 bus with several pyrometers
This configuration is used when great distances must be bypassed. Pipeline lengths up
to 1200 m can be realized.
D-
D+
GND
Interface module
RS-485 <=> USB
3310A14020
Pyrometer
Pyrometer
Adresse 01
Address 01
Wiring configuration for a linear RS-485 bus with several pyrometers
If the electrical grounding of the pyrometer housing cannot be done directly, all shield
connectors are connected in one point with PE. This is ideally the electrical grounding
of the connected computer.
D-
D+
GND
Interface module
RS-485 <=> USB
3310A14020
Pyrometer
Pyrometer
Adresse 01
Address 01
Wiring Configuration of a linear RS-485 bus with several pyrometers
Another possibility to avoid disturbances in the bus is the red marked connection of
all GND lines in the figure above. Please note that ground loops can occur if the shield
connector green/yellow is applied additionally.
Pyrometer
Pyrometer
Adresse 02
Address 02
Pyrometer
Pyrometer
Adresse 02
Address 02
Pyrometer
Pyrometer
Adresse 02
Address 02
120 Ohm
1/4 W
Pyrometer
Pyrometer
Adresse 32
Address 32
120 Ohm
1/4 W
Pyrometer
Pyrometer
Adresse 32
Address 32
120 Ohm
1/4 W
Pyrometer
Pyrometer
Adresse 32
Address 32
27