bonitron M3645P, Reference Manual

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M3645P
36
4.5.6.
O
VERTEMPERATURE
O
UTPUT
- TB2-7
This output closes to TB2-8 when the unit is not indicating an overtemp fault,
and opens if the unit reaches an unsafe operating temperature. This contact
should be monitored and the drive system shut down in the event of an
overtemp fault. Otherwise damage to the power supply may result.
DANGER!
The M3645P will continue to rectify incoming voltage and operate with the
temperature switch open.
Continued operation with the temperature switch open can cause dangerous
overheating of the M3645P, and can cause permanent damage, and
catastrophic failure.
4.5.7.
O
UTPUT
COM - TB2-8
This terminal is the common to the outputs. It is not common to TB2-4, and
allows the use of a different power supply for outputs if the installation
requires.
4.6.
S
TARTUP
This section covers basic checks and procedures that should be used when
performing a startup with a M3645P regenerative DC bus power supply.
4.6.1.
P
RE
-
POWER
C
HECKS
▪ Ensure that the voltage of the AC power system is the same as the
voltage rating of the unit.
▪ Ensure that all connections are tight and that all wiring is of the proper
size and rating for operation.
▪ Verify continuity of all input fuses prior to applying power.
▪ Check for exposed conductors that may lead to inadvertent contact.
▪ Check for any debris, shavings, trimmings, etc. that may cause shorts or
obstruct ventilation on unit.
4.6.2.
S
TARTUP
P
ROCEDURE AND
C
HECKS
After completing pre-checks and recommended checks for connected
equipment, you may apply power to the system. The Power indicator on the
front panel should illuminate. The fan should start, then stop within ten
seconds. Attached drive units should also power on.
Enable the unit by
placing 24VDC on the “Enable” input. (Table 3-6 or Table
3-7 for 150A, 225A, and 300A units)
The Status Contact should be closed after a 2 second delay, which is an
indication that unit is ready for operation.
Observe the current on the digital display, or with a current clamp for systems
without a digital display. If more than 5 amps are flowing with the attached
drive not operating, go to the Troubleshooting instructions in Section 5.3.
Once the Status output closes, the unit is ready to operate in regen mode,
and the drive system can be run normally.
4.6.3.
C
OOLING
F
AN
The cooling fan will not run all the time. The fan runs at startup, when the unit
is regenerating, or when the unit’s internal temperature is above a certain
level. If the cooling fan never runs, there may be damage to the fan and the
unit may need repair.