Pneumatic Installation - GF SPC Betriebsanleitung

Type SPC positioner
CAUTION!
Damage or functional failure due to incorrect connection!
An incorrect pneumatic connection can damage the type SPC positioner. Prevent ingress of dirt and moisture with any open connec-
tions.
► Before putting into operation, ensure correct pneumatic connection according to the diagram.
► Perform a function test upon putting into operation.
► To maintain the IP65/IP67 protection rating, connect the control air outlet that is not required to the free control air connection
of the actuator or close it with a sealing plug.
NOTE!
► "At rest" means that the control valves of the type SPC positioner are de-energized or not actuated.
► With humid ambient air, a hose connection can be established between control air output 22 of the positioner/process controller
and the control air connection of the actuator which is not connected with control function A or control function B, respectively.
This supplies the spring chamber of the actuator with dry air from the vent duct of the type SPC positioner type.
4.2

Pneumatic installation

1
2
3
1. Connect the control medium to the control air connection (3) (3 - 7 bar; instrument air, free of oil, water and dust).
2. Assemble the exhaust air line or a silencer to the exhaust air connection (3) and, for type SPC*, additionally to the exhaust air
connection (3.1).
Exhaust air concept
► To comply with protection rating IP67, an exhaust duct must be assembled in the dry area.
► The control pressure applied must be at least 0.5 - 1 bar higher than the pressure required for the end position of the pneuma-
tic actuator.
► This prevents an excessively small pressure difference from negatively influencing the control behavior in the upper stroke
range.
► Keep the fluctuations of the control pressure as low as possible during operation (max. ±10%). In case of larger fluctuations, the
controller parameters calibrated with the X.TUNE function are not optimal.
CAUTION!
Incorrect control pressure!
Too high or too low control pressure can impair the function or cause property damage or leakage.
► The control pressure must be within the specified pressure range.
► Observe specifications for compressed air quality (see quality class control medium).
20
4
No. Designation
1 Pressure limiting valve
2 Exhaust air connection
Lettering: 3
Type SPC*: Additional exhaust air connection
Lettering: 3.1
3 Control air connection
Lettering: 1
4 Supply air filter
Operating Instructions