Function / mechanical design
When the actuator is driven by DC 0…10 V control voltage or by a 3-position signal, it
produces a stroke which is transmitted to the valve stem.
The description of operation in this document applies to the valve versions which are
fully closed when de-energized (NC valves).
•
Voltage at Y1:
Stem extends
Valve opens
•
Voltage at Y2:
Stem retracts
Valve closes
•
No voltage at Y1 and Y2:
Actuator maintains its current position
•
The valve opens / closes in proportion to the control signal at Y.
•
At DC 0 V, the valve is fully closed (A
→
AB).
•
When power supply is removed, the actuator maintains its current position.
•
Plastic housing
•
Locking-proof, maintenance-free gear train
•
Manual override with hexagonal socket wrench 3 mm
•
Reduced power consumption in the holding positions
•
Load-dependent switch-off in the event of overload and in
stroke end positions
•
Parallel operation of 6 SSD31.., 24 SSD81.. and 10 SSD61..
possible, provided the controllers’ output is sufficient
•
Terminal block connectors for custom made cables available
(only for use with AC 24 V and AC/DC 24 V actuators)
•
Connecting cables with AC 24 V and AC 230 V connectors
cannot be mixed up
•
Halogen-free cables available
48
91
Z1
9
Accessories
4864Z02
Type ASY98 to secure the cable connector
48
91
Z
0
5
4
2
3
1
The cable
connector snaps
into position,
but can be
additionally
secured with the
retaining screw.
4
864
Z
0
4
For special cable lengths of the AC 24 V and AC/DC 24 V actuators.
•
Type ASY99 for 3-position actuators SSD81/00
•
Type ASY100 for DC 0…10 V modulating actuators SSD61/00
The terminal block connectors are supplied complete with
Mounting Instructions (74 319 0385 0).
3-position control
signal
SSD31../SSD81..
DC 0...10 V control
signal
SSD61..
Features and benefits
Retaining screw
ASY98
Terminal block
connectors
ASY99
ASY100
