Siemens PROFIBUS PA SIPART PS2 Manual page 34

Design and Functional Principle
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7. Place the insulating cover (10) over the SIA module underneath
the surface of the basic electronics board at the container wall on
one side. The recesses in the insulating cover must slot into the
corresponding lugs on the container wall. Place the insulating
cover on the SIA module by carefully bending the container walls.
8. Snap the basic electronics board into the four holders and screw it
tight again with the two fixing screws (2.1).
9. Make all the electrical connections between the motherboard and
the options with the ribbon cables provided and between the mo-
therboard and potentiometers with the potentiometer cable.
10. Fix the enclosed module cover instead of the standard version with
the two screws.
11. Select the plates which already exist on the standard version of the
module cover from the set of plates enclosed. Stick the selected
plates according to the standard version to the mounted module
cover.
12. Make the electrical connections.
Setting the two limit values:
NOTE
Connect a suitable display instrument such as the Initiator--Tester type
2/Ex made by Peperl+Fuchs to the terminals 41 and 42 or terminals 51
and 52 of the SIA module to be able to see the switching state of the
slot initiators.
13. Drive the actuator to the first desired mechanical position.
14. Adjust the top actuating disc (7.2) by hand until the output signal
on terminals 41 and 42 changes.
15. Drive the actuator to the second desired mechanical position.
16. Adjust the bottom actuating disc (7.3) by hand until the output si-
gnal on terminals 51 and 52 changes.
NOTE
If you turn the actuating disc beyond the switching point up to the next
switching point, you can set a high-low or a low-high change.
To avoid the actuating discs being accidentally adjusted during opera-
ting, they are relatively sluggish. The following remedy might be of help
if you are having trouble with the adjustment: open and close the ac-
tuator several times while holding the actuating discs. This temporarily
reduces the friction. This allows an easier and finer adjustment.
SIPART PS2 PA Manual
A5E00127926-03