Eaton Rapid Link RAMO5, Manual

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11 Communications
11.5 OP-Bus
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11.5.1.1 RJ45 socket wiring
Note that the reference points (0 V) of the individual bus nodes are con-
nected by the patch cable. In addition to converting the OP system bus signal
to the USB interface of the PC, the connecting cable to the PC also contains
a galvanic isolation between the bus and the USB port on the PC.
11.5.1.2 Addressing
Up to 63 nodes can be connected to the OP system bus, but communication
can only take place between the DX-KEY… operator panel and a node or
between the PC and a node at the same time. The address of the subscriber
determines which subscriber is to be communicated with. It may only occur
once within the system.
The address assignment is arbitrary. This means that there must be no
continuous numbering.
The devices must already be addressed when they are addressed via the bus
for the first time. The DX-KEY-… control units do not require an address of
the OP system bus. However, it must be ensured here that in the case
where two control units are connected to a bus, they must work on different
ports. A possibly integrated PC for parameterization or display also does not
require an address.
The devices are supplied with the address “1” when delivered. This setting
does not need to be changed as long as only one device is operated on the
OP system bus. However, as soon as several devices are connected to an
OP system bus, they must have different addresses. The address is set
using parameter P5-01:
Addressing has to be done before the connection to the OP system bus. This
can be done using the DX-KEY-OLED operator panel.
RJ 45 plug
PIN 1 –
PIN 2 –
PIN 3 –
PIN 4 OP-Bus -
PIN 5 OP-Bus +
PIN 6 –
PIN 7 –
PIN 8 –
1
2
3
4
5
6
7
8
RJ45