Burkert 8696 REV.2, Quick Start Manual

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8
System description
5.2 Model for control of third-party
devices
A special model enables the positioner Type 8696 to be attached
to third-party devices.
This model has a different basic housing so that the pilot air
ports can be connected to the outside of the actuator.
Electrical connection
(circular plug-in connector)
Exhaust air port
(label: 3)
Pilot air port
(label: 1)
Fastening screws (2 x)
Pilot air outlet 2
2
Pilot air outlet 2
1
Basic housing
Fig. 3: Model for third-party devices
ATTENTION!
Damage or malfunction due to ingress of dirt and moisture.
▶
To comply with protection class IP65 / IP67, connect the
pilot air outlet (only for CFA or CFB) which is not required to
the free pilot air port of the third-party device or seal with a
plug.
“In rest position” means that the pilot valves of the posi-
tioner Type 8696 are isolated or not actuated.
If the ambient air is humid, a hose can be connected between
pilot air outlet 2
2
of the positioner and the unconnected pilot
air port of the third-party device for control function A or
control function B. As a result, the spring chamber of the
third-party device is supplied with dry air from the vent duct
of the positioner.
Control function
(CF)
Pneumatic connection
Type 8696 with third-party device
A
Process valve
closed in rest
position
(by spring force)
Pilot air outlet
2
1
2
2
1)
B
Process valve
open in rest
position
(by spring force)
Pilot air outlet
2
1
2
2
1)
Tab. 1: Pneumatic connection to third-party device
1) Connection optionally, see note.
english
Type 8696 REV.2