Flowserve PRS 9 - Manual (Page 7)

7
Explanatory Notes
Scope of supply
PRS 9, design “c”
1 Cycling timer type PRS 9
2 Guide rails
1 32pole screw-type connector
1 Installation instructions
PRS 9, design “d”
1 Cycling timer type PRS 9
1 Installation instructions
Function
Signals coming to the inputs of the level switches and the position-controlled limit
switch will be processed electronically, with the time delay adjusted in the equipment
being taken into account. Dependent on the adjustment the drain valve will be
controlled in one or two steps with a time delay.
System description
The PRS 9 is an analogue/digital cycling timer. In combination with up to four level
switches type NRS 2-4 / NRS 2-5 and a position-controlled limit switch the cycling
timer can, as part of a controlled draining system in a power station, control drain
valves as a function of time.
Design
Design “c”
19" slide-in unit with guide rails and 32pole screw-type connector for installation in
19" magazine acc. to DIN 41494, part 5.
Design “d”
19" spare slide-in unit