5.9 Control Shelf Installation
The control shelf is preassembled. However, verify its various connections against the connection diagram. Illustration 8.6
shows the various control shelf connections.
NOTICE
INCORRECT CONNECTION ORDER
If the connections are not made in the correct order, the drive modules do not function.
Check the following connections:
•
Connection of the 44-pin ribbon cable between the MDCIC and the control card.
•
When used, Safe Torque O (STO) jumper connection must be made between the 12
th
and 27
th
pins to ensure
proper STO operation.
•
Connect the 44-pin ribbon cable to the MDCIC connectors in the correct order.
- For systems with 4 drive modules, connect the ribbon cables to inverter 1, inverter 2, inverter 3, and then
inverter 4.
- For systems with 2 drive modules, connect the ribbon cables to inverter 1, then inverter 2. Leave inverter
3 and inverter 4 terminals unconnected.
NOTICE
SCALING CARD POSITION
If the scaling cards are not placed in the correct order, the drive modules do not function.
•
Place the corresponding current scaling card on each respective connector.
- For systems with 4 drive modules, Inverter 1, Inverter 2, Inverter 3, and Inverter 4.
- For systems with 2 drive modules, Inverter 1 and Inverter 2. Leave connectors Inverter 3 and Inverter 4
unconnected.
•
Do not reverse the current scaling card. Check that the PCB spacer is xed on the MDCIC board.
•
Ensure correct installation of the STO relay and the power supply on the DIN rail. Make the connections as shown
in Illustration 8.6.
•
The external supply (100–230 V) must be available at terminals 1 and 2 on the terminal block.
•
Make more checks to ensure that the wiring of the fuse microswitches and the BRF jumpers are properly routed.
•
Check that all the screws on the PCBs are secure.
•
To ensure proper EMC protection, verify that the MDCIC plate is properly attached to the control shelf assembly.
5.10
Control Wiring Connections
Make sure to use the provided wire pathway when routing the control wires from the bottom of the drive system cabinet to
the control terminal.
Electrical Installation Installation Guide
MG37K302 Danfoss A/S © 08/2017 All rights reserved. 31
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