Modbus MFU Option Card Installation Manual
18 of 64
Publication PUB091-004-00_0918
3.6 Inside a K-Range actuator
The MFU is suitable for fitting into K-Range actuators; wiring diagrams similar to 1612ZMD detail the
option card connections. The MFU module is fitted in the only option board slot inside the K-Range
electrical housing.
SK2 on the MFU card plugs directly onto SK9 on the Main card, while a terminal bung loom brings the
network Modbus signals to SK3 (shown on right hand side of photograph) on the MFU card.
Modbus Option Card
Main Card
Fig 10:
The MFU located in a K-Range actuator
The MFU should be replaced or fitted only in a suitable environment. The actuator must be made
electrically safe before opening any covers. The electrical housing cover should be removed after
unscrewing the four 8mm Allen machine screws.
The MFU card is attached to the main card by three plastic pillars, with one metal pillar, Torx 20 screw
and a fibre washer; as shown in the photograph above.
If an actuator is having the MFU fitted for the first time, then the terminal bung loom must also be
fitted. The terminal numbers will be found in the appropriate wiring diagram, which should be included
in the fitting kit.
