13
System description
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 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
Figure 2:
Model for third-party devices
ATTENTION!
Damage or malfunction due to ingress of dirt and moisture.
▶
To comply with degree of protection 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, REV.2
Summary of Contents for 8696
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