User Manual

Publication 1398-5.0 – October 1998
1-4 Safety
● Before removing the cover of the unit, shut off the main and
auxiliary power and measure the DC bus voltage to verify it has
reached a safe level or wait for the time indicated in the warning
on the front of the drive.
● Do not make any connections to the internal circuitry.
Connections on the front panel are the only points where users
should make connections.
● Be careful of the DC bus and shunt terminals. High voltage is
present when power is applied to the ULTRA 200 Series.
● Never connect the DC- terminal to earth ground, the drive
requires a floating DC bus.
● Do not use the ENABLE input as a safety shutdown. Always
remove power to the ULTRA 200 Series before maintaining or
repairing the unit.
● When operating a 1398-DDM-075 or 1398-DDM-075X with a
single phase power input, the current limits must be set correctly.
● Motors without thermal protection devices require a valid thermal
time constant. Otherwise the motor overload protection will not
function properly.