Product Overview

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Siemens Building Technologies Electro-hydraulic actuators for valves CM1N4564E
HVAC Products 13.02.2009
The SKB32.51, SKB82.51.. and SKB62.. actuators, which feature a spring-return
function, incorporate an additional solenoid valve which opens if the control signal or
power fails. The return spring causes the actuator to move to the
«0 %» stroke position and closes the valve in accordance with the safety requirements
set out in DIN 32730.
The valve is controlled by a 3-position signal either via terminals Y1 or Y2 and
generates the desired stroke by means of above described principle of operation.
• Voltage on Y1 piston extends valve opens
• Voltage on Y2 piston retracts valve closes
• No voltage on Y1 and Y2 piston / valve stem remain in the respective position
The valve is either controlled via terminal Y or override control Z. The positioning signal
Y generates the desired stroke by means of above described principle of operation.
• Signal Y increasing: piston extends valve opens
• Signal Y decreasing: piston retracts valve closes
• Signal Y constant: piston / valve stem remain in the respective position
• Override control Z see description of override control input, page 7
A frost protection thermostat can be connected to the SKB6.. actuator. The added
signals from the QAF21.. and QAF61.. require the use of SKB62UA actuators. Notes
on special programming of the electronics are described under «Enhanced electronics»
on page 5.
«Connection diagrams» for operation with frost protection thermostat or frost protection
monitor refer to page 14.
4567Z03
Calib.
Status
ok
calib.
error
valve
jam
green
red
Status
Calib.
0...10V
4...20mA
Ohm
ZUMYGG0
AC 24V
50/60Hz
G
G0
ON
12
1
2
3
4
1 Connection terminals
2 Mode DIL switches
3 LED status indication
4 Slot for calibration
Positioning signal Y
Position feedback U
Flow characteristic
ON
ON
1 2
4567Z05
DC 4...20 mA
ON
21
4567Z07
lin = linear
OFF *)
ON
1 2
4567Z06
DC 0...10 V
ON
21
4567Z08
log = equal percentage
*) Factory setting:
All switches OFF
Relationship
between control
signal Y and
volumetric flow
0
4
l
i
n
l
o
g
V
100
Y
V
V
0
10 V
20 mA
4567Z04
Spring-return facility
SKB32../SKB82..
3-position control signal
SKB62.., SKB60
Y control signal
DC 0...10 V and/or
DC 4...20 mA,
0...1000 Ω
Frost protection monitor
Frost protection
thermostat
Standard electronics
SKB62.., SKB60
DIL switches
SKB62.., SKB60