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Technical Instructions
Document Number 155-314P25
May 10, 2011
Warning/Caution Notations
Specifications
Power requirements
Functional operation
Agency certification
Ambient conditions
Physical characteristics
Page 2
WARNING:
CAUTION:
Operating voltage
Frequency
Power supply
SSC81U power consumption
SSC81.5U power consumption
Running time
SSC81U
SSC81.5U
Spring return, SSC81.5U only (Figure 1, )
Nominal stroke
Nominal force
Stroke/signal relationship
Capacitor charge time (Figure 1 )
Spring return (SSC81.5U only)
UL
cUL
Ambient temperature
Operation
Transport and storage
Ambient humidity
Media temperature
Wiring Connection
Weight
SSC81U
SSC81.5U
Dimensions
MT Series SSC Electronic Valve Actuator, 24 Vac Floating Control
Personal injury or loss of life may occur if you do not perform
a procedure as specified.
Equipment damage may occur if you do not follow a
procedure as specified.
24 Vac ±20%
50/60 Hz ±2 Hz
Earth ground isolating, Class 2,
24 Vac transformer
NOTE:
0.8 VA
3 VA at ultra cap load,
2 VA at normal operation
125 s ±2% at 60 Hz
125 s ±2% at 50/60 Hz
≈ 30 s
7/32-inch (5.5 mm)
67 lb (300N)
Linear
max. 180 sec
Non-mechanical, electronic returns
to stem up (0 position)
UL873 Listed
Certified to CSA
C22.2 No. 24-93
41°F to 122°F (5°C to 50°C)
-13°F to 158°F (-25°C to +70°C)
0 to 90% rh (non-condensing)
41°F to 248°F (5°C to 120°C)
Plenum cable or 3/8-inch flex conduit
1.1 lb (0.5 kg)
1.3 lb (0.6 kg)
See Figure 10
Do not power more than
10 actuators with one
transformer.
Siemens Industry, Inc.
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