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Siemens
Product Guard
Warranty
SSC Electronic Valve Actuator
24 Vac, Proportional Control
Spring Return or Non-Spring Return
Powermite
MT Series Globe
SSC61U Electronic Valve Actuator.
Description
The Powermite SSC61U and SSC61.5U Electronic Valve
Actuators require a 24 Vac supply and receive a 0 to 10
Vdc control signal to control Powermite MT series valves
with a 7/32-inch (5.5 mm) stroke and a threaded valve
bonnet that ts the actuators.
Features
• UL listed for plenum installations
• Direct coupled, one step installation without
special tools
• Close off up to 120 psi
• Manual override
• Visual position indication
• Spring return or non-spring return
• Orderable as an actuator only or as a complete
valve/actuator assembly
Applications
The Powermite SSC61… electronic actuators and
MT Series Valves are used in heating and cooling
applications to control hot or chilled water or steam for
convectors, fan coil units, unit conditioners, radiation,
reheat coils and similar terminal units requiring a minimum
of 67 lbs. (300 N) nominal force. The SSC61… accepts
plenum cable or 3/8-inch ex conduit connection.
A-149
Valves
Siemens
Product Guard
PLUS 3 Warranty
www.usa.siemens.com/hvac
Page 2
EA1159R1
SSC61 Actuator Specifications
A-150
Operating Voltage ............................................................... 24 Vac +20%
Frequency ........................................................................50/60 Hz +2 Hz
Power Supply ......... Earth Ground Isolating Class 2, 24 Vac Transformer
Power Consumption ......................................................................... 2 VA
Control Signal (Y)
Voltage .............................................0 to 10 Vdc (default) or 0 to 40 mA
with External 500 ohm, 0.2W Resistor
Current ........................................................................................ 0.1 mA
Running Time
at 50/60 Hz ............................................................................ 30 s +10%
Fail-safe (SSC61.5U only).........................................................~25 sec.
~
Nominal Stroke .................................................................7/32" (5.5 mm)
Nominal Force ...................................................................67 lbs. (300 N)
Stroke/Signal Relationship ............................................................Linear
Spring Return (SSC61.5U only) ...................Non-mechanical, Electronic
Return Fails to Stem up (0 Position)
SSC61 Actuator Ordering
Description Part No.
Spring Return SSC61.5U 262
Non-Spring Return SSC61U 261
Actuator
Prex Code
Agency Approvals ........................................... UL873 Listed, Certied to
Canadian Standard C22.2 No. 24-93
Ambient Temperature
Operation........................................................... 41 to 122°F (5 to 50°C)
Transport and Storage ..................................-13 to 158°F (-25 to 70°C)
Ambient Humidity .................................... 0 to 90% RH, Non-condensing
Wiring Connection ......................Plenum Cable or 3/8-inch Flex Conduit
Mounting Location ............................................... NEMA 1 (Interior Only)
Dimensions
Valves
Center Line to
Valve Size
in.
Top of Actuator
1
H
NO NC
NO NC
1/2" (15 mm) 5-1/2" (140 mm) 13-1/2" (343 mm) 5-1/2" (140 mm) 13-1/2" (343 mm)
3/4" (20 mm) 5-1/2" (140 mm) 13-1/2" (343 mm) 5-1/2" (140 mm) 13-1/2" (343 mm)
1" (25 mm) 5-3/4" (146 mm) 13-3/4" (349 mm) 5-1/2" (140 mm) 13-1/2" (343 mm)
Service height and width are the recommended dimensions to allow access to the product.
3.5
(89)
.85
(21.6)
Service
Height
Actual Width
of Actuator
H
4.4
(110.8)
2
(48)
4.5
(115.1)
5.5
(140)
Dimensions shown in inches (mm).
Service
Width
1
W
0
1
W
Accessories & Service Kits
www.usa.siemens.com/hvac
A-257
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