Samson 3730-3 Safety Manual page 14

Proof testing
6. Check whether the actuator is fully vented within the demanded time.
Tip
Connect a pressure gauge to check that the actuator has completely vented.
− Emergency venting by applying a 0 V signal to terminals 81/82 (solenoid valve):
1. Apply supply air within the permissible range (max. 7 bar) to the positioner which al-
lows the valve to move to the maximum travel/angle of rotation.
2. Apply an electric input signal ≥3.6 mA to the positioner (terminals 11/12).
3. Supply the solenoid valve with a voltage >19 V DC (terminals 81/82).
4. Apply the input signal (terminals 11/12) over a local current source or over the con-
trol system in such a way that the valve moves to 50 % of its travel/opening angle.
Tip
The travel in automatic mode can be read at the positioner in Code 0.
5. Set the voltage to 0 V DC (terminals 81/82).
6. Check whether the actuator is fully vented within the demanded time.
Tip
Connect a pressure gauge to check that the actuator has completely vented.
− Safety-related end position monitoring
1. Apply supply air within the permissible range (max. 7 bar) to the positioner which al-
lows the valve to move to the maximum travel/angle of rotation.
2. Apply an electric input signal ≥3.6 mA to the positioner (terminals 11/12).
3. Switch the positioner to automatic mode (if it has not already been done).
4. Apply the input signal (terminals 11/12) over a local current source or over the con-
trol system in such a way that the valve moves to 50 % of its travel/opening angle.
5. Apply the input signal (terminals 11/12) over a local current source or over the con-
trol system in such a way that the valve moves to the end position.
6. Check whether a signal exists at terminals 41/42 when the valve has reached the
end position.
14 SH 8384-3 EN