Sw1: Priority Circuit; Sw2: Direction Of Action; Sw3/Sw4: Position Feedback Signal - Samson 3274 Mounting And Operating Instructions

Operation
The following functions can be adjusted with the slider switches SW1 to SW4: (see Table 2
for overview)
Table 2: Meanings of the switch positions
Priority operation for actuator stem retracts
Priority operation for actuator stem extends
Direction of action increasing/decreasing (<>)
Direction of action increasing/increasing (>>)
Position feedback signal 4 to 20 mA/2 to 10 V
Position feedback signal 0 to 20 mA/0 to 10 V
7.1.1

SW1: Priority circuit

If the two terminals 82 and 83 are connected, priority operation is activated and the actuator
stem moves to the defined end position. After the connection is interrupted, the actuator stem
follows the control signal. The fail-safe action has priority (in actuators with fail-safe action).
7.1.2

SW2: Direction of action

Direction of action: increasing/increasing (>>)
The actuator stem moves towards the top end position (stem retracts) as the input signal in-
creases.
Direction of action: increasing/decreasing (<>)
The actuator stem moves towards the lower end position (stem extends) as the input signal in-
creases.
7.1.3

SW3/SW4: Position feedback signal

The position feedback signal can be used for the following ranges:
− 4 to 20 mA or 2 to 10 V
− 0 to 20 mA or 0 to 10 V
22
SW1 SW2 SW3
ON
OFF
ON
OFF
ON
OFF
EB 8340 EN
SW4
ON
OFF