Burkert Type 8696 - Manual (Page 13)

13
Systemdescription
5.4. 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 pneumatic connection module 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
Figure 2: Model for third-party devices
NOTE!
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 positioner 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)
Table 2: Pneumatic connection to third-party device
1)
Connection optionally, see note.
english
Type 8696