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Pressure Independent Control 

Technical Instructions 

SSD Series Electronic Valve Actuators 

Document No. 155-773 

 

September 1, 2015 

Siemens Industry, Inc. 

Page 3

 

 

Accessories 

 

Figure 1.  Conduit Connector. 

ASY97

 Conduit connector (quantity one). 

For SSD61U and SSD81U only. 

 

        

 

Figure 2.  Terminal Plug and  

Block Cover. 

Terminal plug and terminal block cover 
(quantity: one each). For SSD61U and 
SSD81U only. 

 

ASY99

 SSD81U actuator  

floating control.

 

 

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. 

 

CAUTION: 

 

Equipment damage may occur if you do not 
perform a procedure as specified. 

 

 

Operation 

 

CAUTION:

 

A valve must be connected to the actuator before applying power.  

If applying power to the actuator when a valve is not connected, the 
actuator will respond to a control signal and the shaft will extend until it 
reaches its maximum end stop. Thereafter, it will not respond to any 
signal. If this occurs:  

1.  Disconnect power.  

2.  Turn the manual position indicator (see Figure 7

)

 on the top of the 

actuator to the 0 position and verify the actuator shaft completely 
retracts. 

3.  Connect a valve to the actuator. 

4.  Reapply power. The actuator will return to normal operation. 

Содержание SSD81U

Страница 1: ...troke and a threaded valve bonnet that fits the actuator Features 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 Application For use in heating and cooling HVAC applications with Pressure Independen...

Страница 2: ...l signal Floating 0 to 10 Vdc Output impedance 100K ohm Positioning accuracy 0 to 10 Vdc 2 of nominal stroke Function SSD81U SSD61U SSD81 5U SSD61 5U Run time in seconds 2 5 mm stroke 75 45 70 15 5 5 5 mm stroke 150 90 125 30 Spring return in seconds 2 5 mm stroke 15 15 5 5 5 mm stroke 30 30 Nominal force 56 lbs 250N 56 lbs 250N 67 lbs 300N 67 lbs 300N Capacitor charge time in seconds 180 max 180 ...

Страница 3: ...SSD81U only Warning Caution Notations WARNING Personal injury loss of life may occur if you do not perform a procedure as specified CAUTION Equipment damage may occur if you do not perform a procedure as specified Operation CAUTION A valve must be connected to the actuator before applying power If applying power to the actuator when a valve is not connected the actuator will respond to a control s...

Страница 4: ...r to control the valve stroke length The actuator will complete a stroke calibration each time the power supply voltage is connected CAUTION Whenever the SSD61U runs a self calibration routine Valve stroke 0 Max stroke Setpoint do not manually intervene in this process See Figure 3 Figure 3 SSD61U Self Calibration NOTE Correct calibration is possible only with valve strokes 1 5 mm For valve stroke...

Страница 5: ...ssive startups bypass the calibration stroke unless the memory is manually cleared If installing the actuator on a different valve such as on a replacement valve manually clear the calibration stroke from memory as follows 1 Remove the terminal cover using a Phillips head screwdriver 2 Locate hole on the circuit board shorting bars 3 Insert and gently twist a flat blade screwdriver to electrically...

Страница 6: ...red Figure 7 Manual Override Operation A Turn hex wrench counterclockwise to retract the spindle B Turn hex wrench clockwise to extend the spindle NOTE Do not perform manual override while the power supply is connected the actuator will not track accurately when the control signal is applied A short power off power on sequence is recommended to recalibrate the SSD61U actuator Wiring Do not use aut...

Страница 7: ...System Neutral G0 System Potential Table 2 Terminal Designations G G0 24 Vac Operating Voltage G System Potential G0 System Neutral Y 0 to 10 Vdc Control Signal Y1 Output shaft extends Y2 Output shaft retracts Start Up Check the wiring and the position indication When the position indicator is in the 1 position the output shaft is extended When the position indicator is on the 0 position the outpu...

Страница 8: ...ur feedback is important to us If you have comments about this document please send them to sbt_technical editor us sbt siemens com Document No 155 773 Printed in the USA Page 8 Troubleshooting Check Wiring for proper connections If the actuator does not provide full flow or full close off check that the actuator is properly attached to the valve If not 1 Turn the power off 2 Manually retract outp...

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