GEM 1435 ePos - Page 14

8.6.6 Positioner specifications
Note: The following diagram is valid for valves with a standard assignment of the spindle position to the
valve position.
(See section "Mechanical data, correlation between travel sensor spindle/valve position")
Control diagram: Default setting / The control characteristic is adjustable.
0
4
0
mA
mA
V
20
20
10
15
16
7,5
10
12
5
5
8
2,5
0
75
100
50
25
Valve opening degree [%]
Set value input (mA / V)
During initialization, the 1435 ePos positioner automatically detects the control function of the
valve and adjusts itself by default so that the valve is closed when the signal is 0/4 mA or 0 V.*
The assignment can be changed subsequently by means of parameters.
* with double acting actuators dependent on pneumatic actuator
System deviation
(dead zone):
1 % default setting
≥ 0.1 % (adjustable)
≤ 2.0 % (preset, K-no. 2442)
≤ 5.0 % (preset, K-no. 2443)
Initialization: automatic (manual possible in ADVANCED system mode)
Close tight function: option
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8 Technical data