Modbus MFU Option Card Installation Manual
12 of 64
Publication PUB091-004-00_0918
from the control board. The replacement board is fitted in the reverse order to removal. The wiring
harness connectors are polarised so that only the correct one will fit its mating part on the circuit
boards.
Don’t forget to re-connect the grey ribbon cable to the edge of the control board.
If the operation is to fit an MFU for the first time, then the necessary wiring loom must be added to the
internal wiring harness of the actuator. The actuator wiring diagram shows the connectors and
harness used. The wiring harness is fitted inside the actuator before attempting to fit the MFU. This
requires that you remove the terminal bung, which is held in place by a large circlip. Be careful to
attach the wiring loom to the correct terminals, which are numbered. Re-fit the terminal bung.
Once the loom is in place, connect it to the MFU, then fit the MFU to the actuator main board
connector. Attach the MFU to the frame, using the Torx 20 screws.
Once the module is fitted, the actuator should be re-assembled.
Once power is applied, the field unit parameters should be checked and corrected, where necessary.
Modbus parameters can be set and adjusted either by using the Infra-red and Bluetooth setting tools
or by Insight 2 using Bluetooth. The parameter setting procedure is covered by the IQ3 Full
configuration, status and monitoring user manual, PUB002-040, available on the Rotork web site,
3.3 Inside an SI
₃
actuator
The MFU is suitable for fitting into SI
3
actuators. When factory-fitted, the network connections will be
as in the diagram below:
The internal layout of the actuator will be similar to that of the IQ3, when considering installation of the
MFU, as above.
