Manual MR 8
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/ A 32-48
MINI
5.1 RS 485 Connection
There are several possibilities for RS 485 connection (4-wire-mode) in the ServiceBus
mode:
Option 1:
RS 485 connection with
built-in
USB-RS 485 converter
An USB cable A-B connects the USB interface (USB connector type B) of the first MR 8 to
PC (USB connector type A). This rack is automatically addressed by 0. The other racks
MR 8 are connected by the cable (type A-A) and are continuously addressed by 1 to 3
(Fig. 14).
Fig. 14: PC connection
Æ
MR 8 with PSB module type
USB
Option 2:
RS 485 connection with
external
USB-RS 485 converter
An USB cable A-B connects the USB interface (USB connector type B) of the USB-RS 485
converter to the PC (USB connector type A). Up to 4 MR 8 racks can be connected one
after another by a cable (type A-A). The addresses of all MR 8 are defined by DIP
switches (see chap. 1.3).
Fig. 15: PC connection
Æ
MR 8 with
external
USB-RS 485 converter
MA 1233-A006 GB
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