GMC-I Messtechnik GmbH
15
A non-crossed serial extension cable (modem cable) is required for
connection to a laptop or a notebook. This can be ordered as an
accessory (article no. GTZ 3241000R0001).
With the CAN bus and Profibus variants (features F1 and F2), the ser-
vice interface can be used independent of bus operation.
Attention!
!
With RS 485 variants (features F3, F4 and F7), communication
is only possible via the service interface after the 4-pole bus
plug has been removed, or when the bus is not in use.
4.9.2 Bus Interfaces
The following points must be observed when wiring the bus interfaces:
–
Corresponding terminals must all be connected in parallel.
–
Wiring must be executed from device to device, devices may not
be star-connected.
–
The two bus ends should be terminated with characteristic wave
impedance.
This is accomplished by setting the “R” switch at the R6000 to
“on”.
CAN (variant with feature F1)
4-pole terminal block
Figure 12 Diagram of Terminal Block for CAN Interface
Terminal Assignments for CAN Interface Terminal Block
Terminal Number
Designation
Description
1
CAN-GND
Ground
2
CAN-L
Low dominant bus signal
3
CAN-SHLD
Optional shield, connected to controller housing
4
CAN-H
High dominant bus signal
4
3
2
1
