Modbus MFU Option Card Installation Manual
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Publication PUB091-003-00_0119
3.3 Inside ROMpak actuator
The MFU is suitable for fitting into ROMpak actuators, wiring diagram RX0X-4X0 (where X can be any
value) details the option card connections on the terminal strip. The MFU module is fitted in the only
option board slot inside the ROMpak electrical housing.
Fig 9: The MFU located in a ROMpak actuator
SK3 is the connection to the Modbus Fieldbus Data Highway; this is connected to SK23 on the main
PCB assembly via an internal loom. The user wires the Modbus connections to the main PCB
assembly at the terminal block SK18 as per the wiring diagram.
The MFU card fitted in the ROMpak actuator cannot be defaulted by the LK1 method previously
described for the Q actuator, as there is no interface card fitted between the MFU card and the
actuator Main PCB.
