Tasks
If time relays, or relays with delayed make contact or break contact are used in emergency stop circuits,
check the relay time settings. See delivery-specific circuit diagrams and safety function specific docu-
mentation (if applicable).
Check the voltage settings of the auxiliary voltage transformers (if any) are according to the actual
power line voltage. See the final circuit diagrams by the designer of the cabinet-installed drive.
Disconnect the unfinished or unchecked 230 V AC cables that lead from the terminal blocks to the
outside of the equipment.
Check that both circuits of STO terminals on the supply control unit are closed (IN1 and IN2 must be
connected to OUT). The supply unit cannot start if either circuit is open. Refer to the wiring diagrams
delivered with the drive. See Control units of the drive.
Frame R8i: Check that both channels of STO IN (X52) connector on IGBT supply module are connected
to 24 V DC for the supply unit to start.
Frames R1i…R4i: Connect the relay outputs XRO1 and XRO3 in parallel on the ZCU control unit, since
the IGBT supply modules have internal charging circuit. See chapter Example circuit diagrams
Powering up the IGBT supply unit
Make sure that it is safe to connect voltage. Ensure that:
• nobody is working on the unit or circuits that are wired from outside into the cabinets.
• covers of the motor terminal boxes are on.
Close the circuit breakers supplying the auxiliary circuits [F22,..., F26].
Close the cabinet doors.
Close the main breaker of the supply transformer.
Switch the auxiliary voltage switch [Q21] on.
Start-up 151
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