Mesa MQC 0506, Руководство по эксплуатации

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MESA Automation GmbH
MQC 05 V 3 EM 9
5.9 Current control
The controller is optimised by factory, do not change !
6 Protection and fault signalling
The green LED indicates the proper function of the unit. In case of a fault, a signal is given by the front red
LED (H1), power stage will be disable and the „ready/drive healthy" relay contact will be open.
Reset the amplifier: supply voltage off-/-on
Monitoring ground fault
Over currents due to ground fault causes the safety switching circuit to respond the same way as an over
current fault.
Monitoring over voltage
If over voltage occurs in the DC Bus voltage, a fault is signalled.
Monitoring under voltage
The +/- 15 V will drop to 0V DC and disables the amplifier.
Monitoring over temperature of the power stage
Monitoring of the heat sink temperature up to 90
°
C or 190
°
F
7 Wiring suggestions
• It is important that the amplifier (Rack or stand-alone) is properly earthed. If the amplifier is not earthed
then if an earth fault occurs in the motor circuit the output of the amplifier will be destroyed.
•
Each motor must be wired separately (cable should be shielded)
•
Motor cable may be shielded if there is a requirement for reduced electrical noise.
•
Speed demand and tacho circuits should be individually shielded (twisted) pairs.
•
Speed demand inputs are differential inputs consequently either polarity can be used. It is Important that if
a single ended input is used then one of the amplifier inputs must be connected to ground. The controller
and the amplifier must operate with the same GND reference potential.
• All control inputs (for example: limit switch, speed demand) have to be twisted and shielded pairs.
•
If cables with two outside shields (better EMV security) are used, the outside shield must be connected to
earth on both sides, the inside shield must be connected to the rack. GND contacts of amplifiers are not
suited to be connected with the shield circuit.