Features and functions
●
Selectable type of seating, limit or torque seating for end position OPEN and end po-
sition CLOSED
●
Torque by-pass: Adjustable duration (with adjustable peak torque during start-up time)
●
Start and end of stepping mode as well as ON and OFF times can be set individually
for directions OPEN and CLOSE, 1 to 1,800 seconds
●
Any 8 intermediate positions: can be set between 0 and 100 %, reaction and signal
behaviour programmable
●
Running indication blinking: can be set
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Positioner
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Position setpoint via HART interface
-
Programmable behaviour on loss of signal
-
Automatic adaptation of dead band (adaptive behaviour selectable)
-
Split range operation
-
Change-over between OPEN-CLOSE control and setpoint control possible via
HART interface
Standard:Application functions
●
PID process controller: with adaptive positioner, via 0/4 – 20 mA analogue inputs for
process setpoint and actual process value
●
Multiport valve: Up to 16 positions, signals (pulse or edge), accuracy < 0.2 %
●
Automatic deblocking: Up to 5 operation trials, travel time in opposite direction can be
set
●
Static and dynamic torque recording for both rotation directions with torque measure-
ment flange as additional accessory
Options:
●
EMERGENCY operation (programmable behaviour)
-
Digital input: Low active (option)
-
Reaction can be selected: Stop, run to end position CLOSED, run to end position
OPEN, run to intermediate position
-
Torque monitoring can be by-passed during EMERGENCY operation
-
Thermal protection can be by-passed during EMERGENCY operation (only in
combination with thermoswitch within actuator, not with PTC thermistor).
Standard:Safety functions
●
Local STOP
-
The actuator can be stopped via push button Stop of local controls if the selector
switch is in position REMOTE. (Not activated when leaving the factory.)
●
Interlock for main/by-pass valve: Enabling the operation commands OPEN or CLOSE
via HART interface
●
EMERGENCY Stop push button (latching): interrupts electrical operation, irrespective
of the selector switch position.
●
PVST (Partial Valve Stroke Test): programmable to check the function of both actuator
and actuator controls: Direction, stroke, operation time, reversing time
Options:
●
Valve overload protection: adjustable, results in switching off and generates fault signal
●
Motor temperature monitoring (thermal monitoring): results in switching off and generates fault indic-
ation
●
Monitoring the heater within actuator: generates warning signal
●
Monitoring of permissible on-time and number of starts: adjustable, generates warning signal
●
Operation time monitoring: adjustable, generates warning signal
●
Phase failure monitoring: results in switching off and generates fault signal
●
Automatic correction of rotation direction upon wrong phase sequence (3-ph AC current)
Monitoring functions
●
Electronic device ID with order and product data
●
Logging of operating data: A resettable counter and a lifetime counter each for::
-
Motor running time, number of starts, torque switch trippings in end position CLOSED, limit
switch trippings in end position CLOSED, torque switch trippings in end position OPEN, limit
switch trippings in end position OPEN, torque faults CLOSE, torque faults OPEN, motor protection
trippings
●
Time-stamped event report with history for setting, operation and faults
●
Status signals according to NAMUR recommendation NE 107: "Failure", "Function check", "Out of
specification", "Maintenance required"
●
Torque characteristics (for version with MWG in actuator):
-
3 torque characteristics (torque-travel characteristic) for opening and closing directions can be
saved separately.
-
Torque characteristics stored can be shown on the display.
Diagnostic functions
93
SA 25.1 – SA 48.1/SAR 25.1 – SAR 30.1
AC 01.2 Intrusive HART Technical data
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