3-1
DP/PA Link and Y Link Bus Couplings
A5E00193841-011
Installation
Overview of contents
Section Topic Page
3.1 Installation principles 3-1
3.2 Installing the DP/PA coupler for stand-alone operation 3-3
3.3 Installing the DP/PA link for non-redundant operation 3-4
3.4 Installing the DP/PA link for redundant operation 3-6
3.5 Installing the Y link 3-9
3.1 Installation principles
Installation orientation
The IM 157, DP/PA coupler and Y coupler modules can be installed either
vertically or horizontally.
Open equipment
The IM 157, DP/PA coupler and Y coupler modules are open equipment. This
means they may only be installed in housings, cabinets or electrical operating
areas and must only be accessible by key or special tool. Only trained or
authorized personnel should have access to the housings, cabinets or electrical
operating areas.
Mounting system
The IM 157, DP/PA coupler and Y coupler modules are installed on rails for the S7
mounting system. A clearance of at least 40 mm both above and below the module
must be maintained for unhindered installation.
For more information on installing S7 modules, refer to the S7-300 Programmable
Controller, Installation manual.
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