GA130001441_002_C0
– 09/2016
23
5.3.7
RS232 / RS485 Interface (Interface RS232 / RS485)
The connection Interface RS232 / RS485 (
Figure 7, E, page 20 and Figure 9, page 23)
permits operation of the instrument via a computer or a terminal.
Figure 9
–
Interface connection socket (SUB-D, 9-way)
1
B (RS485)
2
TxD (RS232)
3
RxD (RS232)
4
Link with 6
5
Ground
6
Link with 4
7
Link with 8
8
Link with 7
9
A (RS485)
Connecting:
Connect the serial interface of the computer using a shielded cable to the connection
RS232/RS485 on the rear of the COMBIVAC CM 51.
WARNING:
When using the serial interface RS232 use a serial extension cable with a 9-
way plug and a 9-way socket. The wires in the cable must not be crossed.
Utilisation of the RS485 requires a special cable.
5.3.8
Profibus-DP Interface (Interface Profibus-DP)
The connection Interface Profibus DP (
Figure 7, F, page 20 and Figure 9, page 23)
provides full integration of the instrument within a Profibus-DP bus system.
Figure 10
–
Connection socket for Profibus DP interface (SUB-D, 9-
way)
1
not used
2
not used
3
RxD / TxD-P
4
CNTR
5
DGND
6
+ 5 VDC
7
not used
8
DGND
9
DGND
Connecting:
Connect the bus system using a corresponding bus cable to the connection Profibus DP
interface on the rear of the COMBIVAC CM 51.
WARNING:
For utilisation of the Profibus DP interface a standard compliant bus cable is
required.
