Proxitron OKS D T10.194 R, Руководство пользователя

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33
occur that leads to disturbances in the communication or to a flow of
compensating current. The pyrometer can get damaged in this way.
US
B
D-
D+
GND
RS
-4
85
120 Ohm
1/4 W
Interface module
RS-485 <=> USB
3310A14020
D+ D- D- D+
Pyrometer
Adresse 01
D+ D- D- D+
Pyrometer
Adresse 02
D+ D- D- D+
Pyrometer
Adresse 32
Topology 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.
120 Ohm
1/4 W
D+ D- D- D+
Pyrometer
Adresse 02
D+ D- D- D+
Pyrometer
Adresse 32
US
B
D-
D+
GND RS
-4
85
Interface module
RS-485 <=> USB
3310A14020
D+ D-
G
ND
D+
Pyrometer
Adresse 01
D-
G
ND
G
ND
Topology 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.
120 Ohm
1/4 W
D+ D- D- D+
Pyrometer
Adresse 02
D+ D- D- D+
Pyrometer
Adresse 32
US
B
D-
D+
GND RS
-4
85
Interface module
RS-485 <=> USB
3310A14020
D+ D-
G
ND
D+
Pyrometer
Adresse 01
D-
G
ND
G
ND
Topology 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
Address 01
Pyrometer
Address 01
Pyrometer
Address 01
Pyrometer
Address 02
Pyrometer
Address 02
Pyrometer
Address 02
Pyrometer
Address 32
Pyrometer
Address 32
Pyrometer
Address 32