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Connecting Pfeiffer Vacuum control units or a PC
► Use the connection cable from the scope of delivery of the control unit or from the
.
► Connect a control unit to the RS-485 interface.
► Connect a PC via the USB/RS-485 converter.
PC
D-Sub
1
2
3
4
Fig. 11:
Cross-link via connection RS-485 using connection cables and accessories
1 RS-485 to M12 adapter
3
M12 to M12 interface cable
2 Y-connector for RS-485
4
USB RS-485 converter
Networking as RS-485 bus
The group address for the electronic drive unit is
902
.
1. Install the devices according to the specification for RS-485 interfaces.
2. Make sure that all devices connected to the bus have different RS-485 device addresses
[P:797]
.
3. Connect all devices with RS-485 D+ and RS-485 D- to the bus.
6.4 Connecting accessories
NOTICE
Property damage to third-party electronic devices
The accessory connections on the vacuum pump do not meet any USB standard. The connection as-
signment does not comply with any standard. Depending on their configuration, the 24 V DC supply
voltage may damage or destroy third-party electronic devices, e.g. tablet computer.
► Do not connect any third-party electronic devices to the accessory connections.
► Only use the connecting sockets for pump-specific accessories.
USB sockets "C" and "D" are each used to connect an accessory. The software of the electronic drive
unit automatically detects accessories connected to interfaces.
6.5 Pfeiffer Vacuum protocol for RS-485 interface
6.5.1 Telegram frame
The telegram frame of the Pfeiffer Vacuum protocol contains only ASCII code characters [32; 127], the
exception being the end character of the telegram C
R
. Basically, a master
(e.g. a PC) sends a tele-
gram, which a slave
(e.g. electronic drive unit or gauge) responds to.
a2
a1
a0
*
0
n2
n1
n0
l1
l0
dn
...
d0
c2
c1
c0
C
R
Interfaces
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Содержание SMARTVANE 55
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Страница 68: ... PD0114 ed A Date 2211 P N PD0114BEN ...