PCPU-2
The adjacent drawing shows the standard setting of a
PCPU-2 when delivered. You need only make changes
in the following cases:
If TTY interfaces are to be active (seldom the case),
change X8 to X11
If several chromatographs are used in the Chrom-
LAN network, change station x1/x16
If the chromatograph is not the last participant in
the RS485 ChromLAN network, change X6 or X7.
Meaning of control elements
Station x1 + x16 Participant number in ChromLAN network,
Standard is number 1
X6
X7
X8+X9
X10+X11
J1
RS485 terminator for SER.3
RS485 terminator SER.4
TTY active/passive for SER.1
TTY active/passive for SER.2
Only for test purposes
Further information
Setting instructions for the eight DIP switches, the jum-
pers X6 to X11 and the two station switches can be
found Register 3: ChromLAN networks with TTY and
ChromLAN networks with RS485. Useful information
on troubleshooting on the PCPU-2 can be found in
Register 2: Problems and faults.
Pin assignments of
interfaces SER. 1 to SER. 4
Pin number on 9-pin plug of
PCPU-2 for
Standard Signal SER.1 SER. 2 SER. 3 SER. 4
RS232 GND
TxD
RxD
CTS
DCD
RTS
1
2
3
5
1
2
3
5
1
2
3
5
6
7
1
2
3
5
6
7
TTY TxD -
TxD+
RxD -
RxD+
6
7
8
9
6
7
8
9
RS485 A
B
8
9
8
9
Voltage +5V4444
Factory setting without control software:
Interface Standard Transmission rate
SER. 1
SER. 2
SER. 3
SER. 4
RS232
RS232
RS232
RS232
9600 baud
9600 baud
9600 baud
38400 baud
DIP switches
Switch On/off Meaning
DIP 1
DIP 1
OFF
ON
SER.2 9600 baud
SER.2 4800 baud if TTY
38400 baud if RS232
DIP 2
DIP 2
OFF
ON
SER.2 TTY
SER.2 RS232
DIP 3
DIP 3
OFF
ON
SER.1 Local printer
SER.1 ChromLAN
DIP 4
DIP 4
OFF
ON
SER.1 TTY
SER.1 RS232
DIP 5,6,7 No significance
DIP 8
DIP 8
OFF
ON
Normal mode
PCPU in programming mode
Jumpers
Interface Jumper
SER. 1
SER. 1
SER. 2
SER. 2
Sender
Empfänger
Sender
Empfänger
X8
X9
X10
X11
aktive
11
passive
SER. 2
SER. 1
SER. 3
SER. 4
DIP
X6
X7
X 9
X 8
X11
X10
ON
18
Station x1
Station x16
switch
J 1
PCPU-2 interface Jumpers
SER. 3
SER. 4
X6
X7
with without terminating resistor
1 1
Control electronics
9STEUER.CHP, Stand 20.05.94
11
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