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Pressure Independent
Control Series
SSD Electronic Valve Actuators
Floating or 0 to 10 Vdc Control
Description
Features
Application
Product Numbers
Pressure Independent Control Series SSD Electronic Valve Actuators require a 24 Vac
power supply and receive a floating control signal (SSD81...) or a proportional 0 to
10 Vdc signal (SSD61...) to control a valve. The 0 to 10V SSD61U actuator also
accepts a 24 Vdc power supply.
These actuators are designed to work with 1/2- to 1-1/4 inch Pressure Independent
Control Series Valves with a 1/10-inch (2.5 mm), 1/5-inch (5 mm), or 7/32-inch (5.5 mm)
stroke and a threaded valve bonnet that fits the actuator.
•
Nominal force >56 lbs (250 N)
•
Automatic stroke calibration on the SSD61...
•
UL listed for plenum installation
•
Reduced power consumption in holding position
•
Direct coupled installation without tools (hand-tightened)
•
Manual override
•
Visual position indication
For use in heating and cooling HVAC applications with Pressure Independent Control
valves. They can be used in chilled/hot water applications or in water-glycol solutions up
to 50% in closed loop systems. The Spring Return SSDx1.5U Series actuators accept
plenum cable or 3/8-inch flex conduit connections.
Product Number
SSD81U
SSD61U
SSD81.5U
SSD61.5U
Technical Instructions
Spring Return
Table 1.
Description
Operating Mode
Floating
Fail-in-place
0 to 10 Vdc
Fail-in-place
Floating
Fail-safe
0 to 10 Vdc
Fail-safe
Document No. 155-773
September 1, 2015
Non-Spring Return
Actuator Prefix Code
230
231
232
233
Siemens Industry, Inc.
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Related Manuals for Siemens SSD81U
Summary of Contents for Siemens SSD81U
- Page 1 3/8-inch flex conduit connections. Table 1. Product Numbers Product Number Description Operating Mode Actuator Prefix Code SSD81U Floating Fail-in-place SSD61U 0 to 10 Vdc Fail-in-place SSD81.5U Floating Fail-safe SSD61.5U 0 to 10 Vdc Fail-safe Siemens Industry, Inc.
- Page 2 -13°F to 158°F (-25°C to 70°C) Humidity Operation 5 to 85% rh Transport <95% rh Storage 5% to 95% rh Dimensions See Figure 13 and Figure 14. Miscellaneous Weight SSDx1U 12.3 oz. (0.35 kg) SSDx1.5U 1.3 lbs. (0.6 kg) Page 2 Siemens Industry, Inc.
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Page 3: Operation
ASY100 SSD61U actuator 0 to 10 Vdc control. ASY98 Replacement screw and nut for use on the conduit connector or the terminal connector, quantity one each. For SSD61U and SSD81U only. Warning/Caution Notations WARNING: Personal injury/loss of life may occur if you do not perform a procedure as specified. - Page 4 A 24 Vac control signal to terminal Y2 retracts the actuator shaft proportionately to the length of time the signal is applied. In the event of a power failure with no control voltage, the non-spring return SSD81U will hold its last position.
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Page 5: Mounting And Installation
When mounting the actuator in a plenum, the proper cable must be attached to meet local codes. Allow 8 inches (200 mm) above the actuator and 8 inches (200 mm) behind the cable for service. Installation instructions are included with the actuator. Siemens Industry, Inc. Page 5... -
Page 6: Manual Override
Determine supply transformer rating by summing total VA of all actuators used. • It is recommended that no more than 10 actuators be powered by one transformer. WARNING: Terminal connection “G0” is Common, not ground. Figure 9. SSD61… Wiring Diagram. Figure 8. SSD81U Wiring Diagram. Page 6 Siemens Industry, Inc. - Page 7 NOTE: The "1" and "0" position markings are intended for reference only and not for stroke measurement Position Position indicator at 1 indicator at 0 Actuator Stem Actuator Stem Extended Retracted Figure 12. Position Indicator. Siemens Industry, Inc. Page 7...
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Page 8: Troubleshooting
Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and models as design improvements are introduced. Product or company names mentioned herein may be trademarks of their respective owners. © 2015 Siemens Industry, Inc. Siemens Industry, Inc.