54
EN
i-ACCURATE i-AX - i-AW - i-AD - i-AT - i-AF
Description
This actuator with 3point or 0÷10V signal is adapt for 2 or 3
way valve with 5,5mm stroke
Function
When the actuator is driven by a 3-position or DC 0…10 V
control signal, it generates a stroke which is transmitted to
the valve stem.
3-position actuators SSC819
•
Voltage at Y1: Actuator stem extends and valve opens
•
Voltage at Y2: Actuator stem retracts and valve closes
•
No voltage at Y1 or Y2: Actuator maintains the current position
DC 0...10 V control - SSC619
•
The valve opens / closes in proportion to the control signal at Y
•
At DC 0 V, the valve is fully closed
•
In the event of a power failure, the actuator maintains its cur-
rent position
Auto calibration - SSC619
When the AC / DC 24 V supply is applied for the first time,
the actuators calibrate themselves independent of the control
signal. In this process, the actuator drives the valve to the
mechanical end stops and stores the associated positions per-
manently in the form of electronic values. The positioning sig-
nal is only active on completion of this calibration process.
Calibration takes about 60 seconds.
Manual override
The rotary knob can be used to drive the actuator into any
position between 0 and 1.
However, if a control signal from the controller is present, this
will take priority in determining the position.
Maintenance
When servicing the actuator:
• Switch off power
• If necessary, disconnect the terminals
• The actuator must only be commissioned with a correctly
mounted valve in place!
Repair
The SSC ... actuators cannot be repaired. They must be
replaced as a complete unit.
3
2
1
B
A
B
(Y2)
(Y, Y1)
A
A
0
1
Position indicator in
position 1 = OPEN
B
0
1
Position indicator in
position 0 = CLOSED
Type
Rated voltage
Run time at 50 Hz
Control signal
SSB81
AC 24 V
150 s
3-position
SSB61
AC/DC 24 V
75 s
DC 0...10 V
Summary of Contents for i-accurate
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