2/8
Siemens Building Technologies
Electrical Actuators
CA1N4895en
HVAC Products
08.03.2004
Type summary
Type reference
Rated voltage
Running time at 50 Hz Control signal Remarks
SSC31
AC 230 V
150 s
3-position
SSC81
AC 24 V
SSC61
AC/DC 24 V
30 s
DC 0...10 V
SSC61.5
With fail-safe function
Type reference
Rated voltage
Running time at 50 Hz Control signal Remarks
SSC81U
AC 24 V
150 s
3-position
SSC81.5U
125 s
With fail-safe function
SSC61U
AC/DC 24 V
30 s
DC 0...10 V
SSC61.5U
With fail-safe function
Type reference Description
ASK30
Mounting kit for use with former Landis & Gyr valves VVG45…, VXG45… and X3i...
When ordering, please give quantity, product name and type reference.
2 actuators SSC81
The actuators, valves and accessories are packed separately.
Equipment combinations
Type reference
Type of valve
k
vs
[m
3
/h]
PN class
Data Sheet
VVP45...
2-port
valves
0.25...25 PN16 N4845
VXP45...
3-port
valves
VMP45...
3-port valves with T-bypass
0.25...4
VVG45...
1)
2-port
valves
0.63...25
VXG45...
1)
3-port
valves
X3i...
1)
3-port
valves
0.7...14
Retrofitting to
former L&G
valves
1)
With ASK30 mounting kit
Function / mechanical design
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.
•
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
•
The valve opens / closes in proportion to the control signal at Y
•
At DC 0 V, the valve is fully closed (A
→
AB)
•
In the event of a power failure, the actuator maintains its current position
Standard versions
Special UL-listed
versions
Accessories
Ordering
Example:
Delivery
3-position actuators
SSC31 / SSC81
DC 0...10 V control
SSC61
