Connection of control unit
CONNECTION
OF CONTROL UNIT
The control unit is an
IBM
-compatible personal
computer. It can be permanently connected to the
chromatograph, or it can be transported from
chromatograph to chromatograph and only con-
nected for a short time. In addition, more than one
chromatographs can be operated using one control
unit if they are in a network.
Every chromatograph has four serial interfaces on the
PCPU-2 via which all chromatograph parameters can
be accessed:
SER. 1
SER. 2
SER. 3
SER. 4
TTY or RS232
TTY or RS232
RS485 or RS232
RS485 or RS232
With
PGC 302
SER. 1 is connected as a TTY inter-
face, SER. 3 and SER. 4 are connected as RS485
interfaces to the terminal board for fixed wiring.
With
RGC 202
SER. 2 is connected as a RS232 in-
terface to the front of the chromatograph, SER. 3
and SER. 4 are connected as RS485 interfaces to
the terminal board for fixed wiring.
Local connection of control unit
using prepared RS 232 cable
Connect the plug PCPU to the socket V.2 4 at the front
of the chromatograph (RGC 202) or to the socket
SER.2 at the PCPU respectively (PGC 302). Connect
the other end to the socket com1: of the control unit.
NOTE:
The cable is included in the delivery if you have ordered the
control unit from us together with the chromatograph.
WARNING: Explosion protection
You require permission if you wish to
transport a laptop through the potentially
hazardous atmosphere or if you wish to
open a chromatograph in a division 1 area.
Permanent
local installation of control unit
The pin assignments of the RS232 interface are de-
scribed in your control unit manual. Connect the cable
according to the following diagram:
SER.4 SER.3
TIMEOUT
RESET
PROG.
X 16 Station X 1 RUN
SER.4 SER.3 SER.2 SER.1
Control unit
RS232 / COM1:
9 pin socket
TxD
Signal GND
RxD
2
PGC 302
Interface SER.2
9 pin socket
RGC 202
Socket at front
9 pin socket
GND
3
5
RxD
1
TxD
2
3
Cable:
9 pin D-Sub female <-----> 9 pin D-sub male
Connection of control unit
18
3VERDRAH.CHP, Stand Dezember 22, 1999
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