Burkert Type 8793 - Manual (Page 50)

50
Installation
Type 8792, 8793
english
Procedure:
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Apply supply pressure (1.4 – 7 bar) to the supply pressure connection P.
For.single-acting.actuators.(control.function.A.and.B):
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Connect one working connection (A1 or A2, depending on required safety position) to the chamber of the
single-acting actuator.
Safety positions see chapter “11.8. Safety end positions after failure of the electrical or pneumatic auxiliary
power”.
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Seal a working connection which is not required with a plug.
For.double-acting.actuators.(control.function.I):
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Connect working connections A1 and A2 to the respective chambers of the double-acting actuator
see chapter “11.8. Safety end positions after failure of the electrical or pneumatic auxiliary power”.
Important.information.for.perfect.control.behaviour!
This ensures that the control behaviour is not extremely negatively affected in the upper stroke range on
account of too little pressure difference.
• keep the applied supply pressure at least 0.5 – 1 bar above the pressure which is required to move the
pneumatic actuator to its end position.
If fluctuations are greater, the control parameters measured with the X.TUNE function are not optimum.
• during operation keep the fluctuations of the supply pressure as low as possible (max. ±10%).