Installation
3-5
DP/PA Link and Y Link Bus Couplings
A5E00193841-011
Installing the DP/PA link
Step Activity
1 Insert the bus connector included with the DP/PA coupler onto the IM 157.
2 Hook the IM 157 onto the S7 rail and swing it downward.
3 Tighten the bolts of the IM 157 to secure it.
4 If applicable, insert the bus connector of the next DP/PA coupler on the right
side of the DP/PA coupler.
5 Hook the DP/PA coupler onto the S7 rail to the right of the IM 157 and swing it
downward.
6 Screw the DP/PA coupler on securely.
7 Repeat steps 4 to 6 for the subsequent DP/PA couplers. For the last DP/PA
coupler (of a maximum of 5), do not insert a bus connector prior to installation.
8 Wire the IM 157 and the DP/PA coupler(s) as described in Section 4.2.2.
Inserting/Removing DP/PA Couplers
If you would like to remove/insert DP/PA couplers during operation, bus modules
must be used in the configuration rather than bus connectors (see Section 3.4).
Removing the DP/PA link
To remove the DP/PA link, proceed as above but in reverse order. Begin with the
DP/PA coupler mounted at the far right.
If the DP/PA link is already in operation, switch off the 24V DC power supply prior
to removal.
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