Manual MCD
+
8.2 ServiceBus Mode
If more than one MCD is operated (max.16), the RS485 field bus is best choice (4 wire
operation).
The ServiceBus Mode setting:
The ServiceBus Mode is activated by the rotary switches S1 to S4 on the MCD. The rotary
switches S2, S3 and S4 must be set
all
to ‘
0
’. The rotary switch S1 is used for device
address setting (0...F). Therefore, up to 16 MCD power stages can be connected by the
connectors X4 and X5 and addressed.
Two possibilities for MCD connection acc. to RS485 (4-wire operation):
1. MCD connection to PC by an USB-RS485 converter:
Fig. 28:
Connection PC
Æ
MCD by USB-RS485-converter
2. The power stage is connected to the RS422/RS485 interface of the PC:
Fig. 29:
Connection PC
Æ
MCD by RS422/RS485-interface
MA 2102-A005 GB
34
