Siemens Building Technologies
CM1N4573E / 06.2001
Landis & Staefa Division
5/8
Used in conjunction with valve types VVG44..., VVI52... or VXG44..., these actuators
generate a linear flow characteristic.
In conjunction with valve types VVG44..., VVI52... or VXG44... these actuators generate
an equal-percentage flow characteristic (factory-setting) via the integrated electronic
assembly. The flow characteristic can be changed to “linear” by repositioning the
connector.
The technical data (
∆
p
max
,
∆
p
s
, leakage rates, noise levels, service life etc.) given for the
applications described applies only to the Landis & Staefa valves listed in this data
sheet under “Compatibility”.
The use of type SQS… actuators in conjunction with third-party valves invalidates
all claims under the Landis & Staefa warranty.
When servicing the valve: switch OFF the pump and power supply, close the main shut-
off valve in the pipework, release pressure in the pipes and allow them to cool down
completely. If necessary, disconnect electrical connections from terminals.
The actuator must be correctly fitted to the valve before re-commissioning.
Operating voltage
SQS35...
AC 230 V ± 15 % , 50 / 60 Hz
SQS65...
AC 24 V ± 20 % , 50 / 60 Hz
SQS85...
AC 24 V ± 20 % , 50 / 60 Hz
Power consumption
SQS35.00
2.5 VA
SQS35.03
3.5 VA
SQS35.50
5 VA
SQS35.53
6 VA
SQS65, SQS65.2
4.5 VA
SQS65.5
7 VA
SQS85.00
2 VA
SQS85.03
2 VA
Switching capacity of limit switchesTerminals 11 or 12
SQS35..., SQS85...
AC 250 V, 6 A resistive / 2.5 A inductive
Type of control (control signal)
SQS85...
3-position
SQS65, SQS65.5
DC 0...10 V (proportional)
SQS65.2
DC 2...10 V (proportional)
Run-time
Opening or closing
SQS35.00, SQS35.50, SQS85.00
150 s at 50 Hz
SQS35.03, SQS35.53, SQS85.03
35 s at 50 Hz
SQS65, SQS65.2, SQS65.5
35 s at 50 Hz
Spring return feature
SQS35.50, SQS35.53, SQS65.5
Closing time 8 s
Positioning force
400 N
Stroke
5.5 mm
Terminal Y (SQS65, SQS65.5)
DC 0 ... 10 V, max. 0.1 mA
Terminal Y (SQS65.2)
DC 2 ... 10 V, max. 0.1 mA
Terminal R (SQS65, SQS65.5, SQS65.2)
Resistance 0 ...1000
Ω
Terminal U (SQS65, SQS65.5, SQS65.2)
DC 0 ...10 V, max. 0.5 mA
Housing protection standard
IP54 to EN 60529
Cable glands
Pg11 (2 x)
Temperature of medium in the connected valve
+2 ... +130 °C
SQS35... / SQS85...
SQS65...
Warranty
Maintenance
Technical data
Power supply
Operating data
Signal inputs
Signal outputs
Housing protection standard
Ambient conditions
