Siemens SIPART Series - Page 56

Installing/mounting
4.7 Installing option modules
SIPART PS2 with and without HART
54 Operating Instructions, 10/2013, A5E00074631-11
General procedure for optional modules in the "flameproof enclosure" version
1. Disconnect the power supply lines or de-energize them.
2. Open the safety catch
⑬.
3. Unscrew the screw cap
⑨.
4. Completely dismount the positioner from the actuator.
5. The positioner comes with a ring gear
⑯ and a pin (feedback lever bracket) ⑲ which
interlock and ensure backlash-free position feedback. To ensure backlash-free position
feedback make sure to remove the adapter
⑩ carefully. To this end, turn the feedback
shaft
⑮ at the positioner until the pin (feedback lever bracket) ⑲ below the adapter
shows in the direction of removal. You determine the position of the pin by looking into
the enclosure below the adapter. Now, the pin can be easily removed from the ring gear
⑯.
Note
Damage to the ring gear
The ring gear consists of two washers fastened staggered to each other.
This offset
ensures that path detection is backlash
-free.
•
Do not change this offset mechanically.
6. Unlatch the four fixing screws ⑫.
7. Completely remove the adapter
⑩ from the enclosure ⑰.
NOTICE
Displaced O-rings
There are several O-rings between adapter ⑩ and enclosure ⑰. These O-rings may
come off during removal.
• Carefully remove the adapter. Make sure the O-rings do not get lost during removal.
8. Remove the module cover ①. Unlatch both screws ② using a screwdriver.
9. Install the optional modules as described in the corresponding chapters for the individual
optional modules.
10.Now start with the assembly. Install the module cover
①. To this end, turn the screws ②
counter clockwise until they noticeably engage in the thread pitch. The module cover
protects and locks the optional modules mechanically.
Note
Untimely wear
The module cover is fastened using self
-tapping screws. You can prevent the module
cover
from wearing untimely by adhering to the installation instructions.
Carefully tighten both screws ② in a clockwise direction.