SSD61.5U Siemens Actuator

Datasheet

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.

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

A 24 Vac control signal to terminal Y2 retracts the actuator shaft proportionately to the length of time the signal is applied.

The stroke of the SSD61.5U is proportional to the control signal on terminal Y. A 0 Vdc control signal retracts the stem and returns the valve to its normal position.

In the event of a power failure, the SSDx1.5U returns to the stem up, or normal position. The SSDx1.5U includes an electronic return mechanism that functions as follows. See Figure 4.