Siemens SIPART PS2 Operating Instructions Manual page 59

⑫
Transmission ratio selector
Figure 4-10 Installing the optional modules in the "flameproof enclosure" version
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
3. Unscrew the screw cap
4. Completely dismount the positioner from the actuator.
5. The positioner comes with a ring gear
6. Unlatch the four fixing screws
7. Completely remove the adapter
8. Remove the module cover
9. Install the optional modules as described in the corresponding sections for the individual
SIPART PS2 with and without HART
Operating Instructions, 02/2016, A5E00074631-AB
interlock and ensure backlash-free position feedback. To ensure backlash-free position
feedback make sure you remove the adapter
⑲
shaft on the positioner until the pin (feedback lever bracket)
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
.
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.
NOTICE
Displaced O-rings
There are several O-rings between adapter
come off during removal.
• Carefully remove the adapter. Make sure the O-rings do not get lost during removal.
optional modules.
.
⑮
.
and a pin (feedback lever bracket)
⑪
⑳
.
⑪
from the enclosure
⑪
①
. Unlatch both screws
4.7 Installing option modules
carefully. To this end, turn the feedback
⑯
below the adapter
.
and enclosure . These O-rings may
②
using a screwdriver.
Installing/mounting
⑰
which
⑪
59