Data Sheet for Product

Flowrite 599 Series SKB/C Electronic Valve Actuator Proportional Control Technical Instructions
Document Number 155-163P25
September 25, 2018
Siemens Industry, Inc. Page 9
Automatic operation
When returning to automatic control, turn the crank arm of the manual setting knob
counterclockwise until the red numbers disappear. It is essential that the window is clear
and the crank arm is snapped into position. See Figure 13.
NOTE: It is possible to secure the manual override handle in place by inserting a
# 8 ×1-1/4-inch or M5 × 30 mm thread-forming screw through the handle.
Figure 13. Automatic Operation.
Wiring
Do not use autotransformers. Use earth ground isolating step-down Class 2 transformers.
Determine supply transformer rating by summing total VA of all actuators used. The
maximum rating for Class 2 step-down transformer is 100 VA.
Actuator
Power
Consumption
Actuators per
Class 2 Supply Circuit*
(80% of transformer VA)
SKB62U
17 VA
4
SKC62U
28 VA
2
* Operating more actuators requires additional transformers or
separate 100 VA power supplies.