Samson 3761, Mounting And Operating Instructions

Page: 11 / 28

EB 8386 EN
11
Attachment to rotary actuators
Pos.2 Pos.1 Pos.2
Pos.1
N
N
B
I
I
A
N
Pin Starting position I Pin Starting position N
Pos.2 Pos.1
N
B
I
Pos.2 Pos.1
I
A
N
Pin Starting position N Pin Starting position I
Single-acting actuator with spring return mechanism
Valve opens counterclockwise, linear cam disc (standard)
Fail-safe position "valve CLOSED" without supply pressure
Orientation of cam disc when control valve is closed
Direct operating direction Connection: Output 1 38 Reverse operating direction Connection: Output 2 38
Ref. variable Signal pressure Valve Cam Ref. variable Signal pressure Valve Cam
Increases Increases Opens A Decreases Increases Opens B
Fail-safe position "valve OPEN" without supply pressure
Orientation of cam disc when control valve is closed, additionally apply max. signal press. to actuator
Direct operating direction Connection: Output 1 38 Reverse operating direction Connection: Output 2 38
Ref. variable Signal pressure Valve Cam Ref. variable Signal pressure Valve Cam
Decreases Decreases Opens
B
Increases Decreases Opens
A
Fig. 5 · Aligning the cam disc for single-acting rotary actuators with spring return mechanism