2 components – Moniteur 50 Series SMART Positioners User Manual
Page 20
Design and Method of Operation
2-2
Positioner SIPART PS2/SIPART PS2 PA
C79000-G7476-C150–01
The actuator position can be output as 2–wire signal J
y
= 4 to 20 mA
using the J
y
option module.
The actuator can also be monitored for two programmable limit values.
Limit value alarms are output via the alarm option module that can also
monitor and signal the function of the positioner and the actuator. In
automatic operation the system deviation is monitored as a function of
the actuating time. The three binary outputs are implemented as semi-
conductor outputs and feature self–annunciation, i.e. the outputs re-
spond even if the auxiliary power or the electronics fails.
Depending on how it is configured, the actuator can be blocked, for ex-
ample, or put into its final position by an external event via the binary
input (BE2) which is also located on the alarm module.
Via the optional HART module it is possible to communicate with the
controller.
2.2
Components
8
9
1
2
3
4
5
6
7
8
9
10
4
2
1
5
**)
for double-acting
actuators
6
6.2
6.1
10
3
7
90
°
33
°
1
Input: inlet air
2
Output: positioning
pressure Y1
3
Display
4
Output: positioning
pressure Y2
**)
5
Control pushbuttons
6
Restrictor Y1
6.1
Restrictor Y1
**)
6.2
Restrictor Y2
**)
7
Transmission ratio selector
8
Adjusting wheel clutch
9
Terminals
Basic instrument
10
Terminals
Optional modules
11
Purging air selector
11
138
8
238
Fig. 2-1
View of the instrument (cover open), devices without PROFIBUS PA
Devices without
PROFIBUS PA