Lenze MC3000 Series - Manual (Page 19)

13435743_EDBM301_v14 .0 15
6 .2 .2 CIRCUIT DESCRIPTION
The control section consists of a control board with a 16 bit microprocessor, keypad and
display . Drive programming is accomplished via the keypad or the serial communications
port . During operation the drive can be controlled via the keypad, by control devices wired
to the control terminal strip, or by the the serial communications port . The Power Board
contains the control and protection circuits which govern the six output IGBTs . The Power
Board also contains a charging circuit for the bus filter capacitors, a motor current feedback
circuit, a voltage feedback circuit, and a fault signal circuit . The drive has several built
in protection circuits . These include phase-to-phase and phase-to-ground short circuit
protection, high and low line voltage protection, protection against excessive ambient
temperature, and protection against continuous excessive output current . Activation of
any of these circuits will cause the drive to shut down in a fault condition .
6 .2 .3 MC3000 INPUTS AND OUTPUTS
The drive has two analog inputs (0-10 VDC and 4-20 mA) that can be used for speed
reference, PID setpoint reference, or PID feedback . A speed potentiometer (10,000 ohm)
can be used with the 0-10 VDC input .
There are also two analog outputs: one is proportional to speed (frequency), and the
other is proportional to load .
The drive has three programmable outputs for status indication: one Form C relay and
two open-collector outputs .
Refer to Sections 14 - CONTROL WIRING and 15 - CONTROL WIRING DIAGRAMS
for more information .