User Manual

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Siemens Electromotoric actuators CA1N4895en
Smart Infrastructure 2019-10-02
Type summary
Type reference
Operating
voltage
Running time at
50 Hz
Positioning
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 (30 s)
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.
Items are supplied individually packed.
Equipment combinations
Type
reference
Type of valve
k
vs
[m
3
/h]
PN class
Data Sheet
VVP45.. 2-port valves
0.25...25
PN 16
N4845VXP45.. 3-port valves
VMP45.. 3-port valves with T-bypass 0.25...4
VVG45..
1)
2-port valves
0.63...25
Retrofitting to
former Landis
& Gyr valves
VXG45..
1)
3-port valves
X3i..
1)
3-port valves 0.7...14
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 valve opens
· Voltage at Y2: Actuator stem retracts 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).
· When power supply is removed, the actuator maintains its current position.
When first connected to power, or
after a power failure, the capacitor
which stores energy for the fail-safe
function will be charged. This process
takes up to 180 seconds.
While the capacitor is being charged,
the actuator cannot respond to any Y
control signals.
max 180 s
max
30 s
Charging
Calibration Discharge
4895Z01en
Stroke
[
%
]
100
0
t
60 s
Normal
actuator
operation
On completion of the charging process and self-calibration (see below), the "Open" and
"Close" travel are proportional to the DC 0…10 V control signal.
In the event of a power failure of more than 5 seconds, the actuator will return
mechanically to its 0 % stroke position within 30 seconds, closing the valve
(A ® AB).
Standard versions
Accessories
Ordering
Example:
Delivery
3-position control
signal
SSC31 / SSC81
DC 0...10 V control
signal
SSC61
…
Electrical fail-safe
function
SSC61.5