phytron MCC-1, Руководство пользователя

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Manual MCC-1
MA 1249-A009 EN
34
6.5.3 RS 485 Interface
When up to 16 MCC-1 are connected together in bus mode (RS 485/4-wire), an individual
address has to be set by the rotary switch ‚Address’ for each MCC-1.
Fig. 21: X5 Com: connector type A (DIN IEC 61076-3-107)
PC with RS 485/4-wire- or RS 422 interface
↔
RS 485-Bus
The next figure shows the RS 485 bus connection to up to 16 MCC-1:
Fig. 22: Connection PC (RS 422/485 interface)

MCC-1 (RS 485 interface)
Remark:

It is not necessary to use an external bus termination connector for RS 485 bus,
because the bus termination resistors are already built-in the MCC-1.

In the RS 485 bus mode the PC is the master. Therefore an interface type RS 422 or
RS 485/4-wire is necessary.
The complete bus only operates, if all devices are supplied at X9 connector.
If the supply voltage is disconnected on one MCC-1, all following devices on
bus are without communication.