5 Interfaces
5.1 Interface RS-485
DANGER
Danger to life from electric shock
When establishing the voltages that exceed the specified safety extra-low voltage (according to IEC
60449 and VDE 0100), the insulating measures will be destroyed. There is a danger to life from elec-
tric shock at the communication interfaces.
►
Connect only suitable devices to the bus system.
The interface with the designation "RS-485" on the electronic drive unit is intended for connecting an
external PC. The connections are galvanically safe and are isolated from the maximum supply voltage
for the electronic drive unit. The electrical connections are optically decoupled internally.
Designation Value
Serial interface RS-485
Baud rate 9600 Baud
Data word length 8 bit
Parity none (no parity)
Start bits 1
Stop bits 1
Tbl. 12: Features of the RS-485 interface
Pin Assignment
1 not connected
2 +24 V output, ≤ 150 mA loading capacity
3 not connected
4 not connected
5 RS-485: D+
6 GND
7 RS-485: D-
8 not connected
Tbl. 13: Connection assignment of the RS-485 connecting socket RJ-45
Connecting Pfeiffer Vacuum display and control units or a PC
1. Use the respective connection cable from the control unit shipment or from the accessories pro-
gram.
2. Use the option to connect a PC via the USB/RS-485 converter.
5.2 Cross-linked via the RS-485 connection
DANGER
Danger to life from electric shock
When establishing the voltages that exceed the specified safety extra-low voltage (according to IEC
60449 and VDE 0100), the insulating measures will be destroyed. There is a danger to life from elec-
tric shock at the communication interfaces.
►
Connect only suitable devices to the bus system.
Interfaces
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