Installing the PROFIBUS DP Interface, CI854/CI854A/TP854 Section 2 Installation
116 3BSE036351-510 A
Installing the PROFIBUS DP Interface,
CI854/CI854A/TP854
The CI854/CI854A is powered from the processor unit via the CEX-Bus and
requires therefore no additional external power source.
Use the following procedure to install the CI854/CI854A/TP854:
1. Mount the unit onto the DIN-rail, see Mounting AC 800M Units onto DIN-Rail
on page 65 and Installing the PM86x/TP830 Processor Unit in Single
Configuration on page 78.
2. Install a connector on the PROFIBUS DP cable. A connector with a switchable
built-in bus termination is recommended. Connect the cable screen to the metal
case of the connector to ground the screen via CI854/CI854A. Connect the data
cable wire A to the terminal PIN8 (RxD/TxD-N) and the data cable wire B to
the terminal PIN3 (RxD/TxD-P). If the data transfer cable has data wires with
red and green insulation, then the following assignment should be used:
Data cable wire A: green
Data cable wire B: red
3. Connect the cable shield for both lines to functional ground, for example by
using a grounding clamp.
4. Connect the PROFIBUS DP cable to one of the connectors PROFIBUS A or
PROFIBUS B on the baseplate. For support of Line Redundancy connect a
second PROFIBUS DP cable to the other contact.
5. If the CI854/CI854A is at the end of the PROFIBUS DP cable, switch the bus
termination ON. Otherwise leave the bus termination switched OFF.
The following applies for CI854A:
6. If the CI854A is installed in a redundant configuration connect the
PROFIBUS
DP cable to primary and backup module. Do it like described in
Figure 39 on page 117. Switch the termination ON for the interface on primary
or backup module that is at the end of the line.
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