Fitting the Profibus card
Publication PUB088-005-00_1017
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3.5 Inside a Skil or EH actuator
The PFU is suitable for fitting into Skil and EH actuators, wiring diagram SWM SI-001 and WD18460.
The PFU is normally located in the first option board slot inside the electrical housing using connection
SK1.
The Interface card must be correctly profiled and loaded with the appropriate connectors to match the
actuator. The illustration below shows the Skil and EH version of the PFU. The links for the bias
resistors are shown in the ‘not terminated’ position.
With the Skil/EH actuator the remote inputs are always present (they are conditioned by the PFU) and
there is an option to include Digital Outputs from relay contacts. The following table describes the
wiring harnesses and their function in the Skil/EH actuator.
PFU Socket
Wiring Harness
SK2
24V power supply input from actuator
SK3
Profibus Fieldbus connection
SK5
Main Board connections
SK7
Not used
SK8
Not used
SK10
Analogue Input connection
Note:
– Only available on Single Channel module.
To restore the interface card to its factory defaults and the associated default parameter settings, LK1
on the Interface card should be fitted and the power cycled (see Fig. 11).
Fig 10: The Profibus Mk2 card profiled for the Skil and EH actuators
