Inside A Cva Actuator - rotork Mk3 Technical Manual

Foundation Fieldbus CP Option Card Technical Manual
3.1.3

Inside a CVA actuator

The FF CP is suitable for fitting into CVA actuators. When factory-fitted, the wiring diagram will be
CXX-80 (where X can be any value). This details the option card connections to the terminal bung.
The FF CP module is fitted in the only option board slot inside the CVA electrical housing - on the
underside of the Main PCB assembly. The FF CP should be replaced or fitted only in a suitable
environment.
Fig 3.3: The FF CP located on the underside of the control PCB in a CVA actuator
To fit an FF CP card, begin by removing power from the actuator and wait until the LED on the
selector knob stops illuminating. This may take several minutes if a reserve power pack of capacitors
is fitted.
Remove the six M10 machine screws from the upper cover and lift it off carefully, while removing its
ribbon cable connector from the socket on the Main PCB.
Remove the various wiring looms from the sockets on the edges of the Main PCB, noting carefully
where they attach. Each connector is different to avoid error.
Remove the Main PCB in its plastic chassis by gently pushing the chassis legs inwards to release
them from a groove in the actuator housing.
Fit the FF CP to the underside of the Main PCB using the hardware supplied with the FF CP card.
The wiring loom from the actuator terminal bung connects the FF H1 field connections to SK3. If a new
card is being fitted as an upgrade, then the actuator will need to have the loom fitted. Remove the
terminal bung by removing the circlip and gently pulling the bung. Attach the loom and replace the
bung.
The FF CP is connected to the control module by a header, SK2.
The FF CP in the CVA must be enabled. This would usually be done during factory test, but may be
required to be completed on site for conversions to FFs or if a replacement card is fitted. To enable
the card, the Rotork PDA software Enlight (downloadable from the Rotork web site) is required to be
used to change parameter 34. It must be read and then have 2048 decimal added to it.
This procedure is best performed by a Rotork Engineer.
16 of 116 Publication PUB089-005-00_0618