Rockwell Automation 1336 8A-48A Fiber Industry - Manual (Page 38)

2–30 Installation/Wiring
Optional Output Reactor
Bulletin 1321 Reactors listed in the 1336 PLUS-3.0 Price Sheet can
be used for drive input and output. These reactors are specifically
constructed to accommodate IGBT inverter applications with switch-
ing frequencies up to 20 kHz. They have a UL approved dielectric
strength of 4000 volts, opposed to a normal rating of 2500 volts. The
first two and last two turns of each coil are triple insulated to guard
against insulation breakdown resulting from high dv/dt. When using
motor line reactors, it is recommended that the drive PWM frequen-
cy be set to its lowest value to minimize losses in the reactors.
Important: By using an output reactor the effective motor voltage will
be lower because of the voltage drop across the reactor –
this may also mean a reduction of motor torque.
Terminal blocks TB4 and TB6 (B Frame drives & up) allow the
drive power supplies to be operated from an external voltage source.
Both terminal blocks are located on the Base Driver Board and are
accessible from the front of the drive. See Figure 2.1 for locations.
TB4 can be used to externally power the low voltage power supply,
allowing operation of drive control functions in the absence of bus
voltage. Applying proper voltage to TB4 (see Table 2.H) provides
+5V,
±
15V and isolated 12V outputs for:
•
Main Control Board (Control Interface Boards, RIO Board, etc.)
•
SCANport
t (HIM, etc.)
•
Encoder(s)
•
ELMS
•
Precharge
•
Any DC fans in the drive
TB6 can be used to externally power the high voltage power supply
which provides inverter IGBT drive voltage and the low voltage
necessary to power the low voltage power supply. This allows
operation of the drive in the absence of bus voltage.
The maximum and minimum wire size accepted by TB4 is 2.1 and
0.06 mm
2 (14 and 30 AWG). Wire sizes for TB6 are 5.3 and 0.06
mm 2 (10 and 30 AWG). Use Copper wire Only with a minimum
temperature rating of 75
°
C. Maximum torque for both terminal
blocks is 0.57 N-m (5 lb.-in.).
Table 2.H
Power Supply Input Requirements
1
Terminal
Block
Drive Type Input Voltage
Average
Current Peak
Current
TB4 All 22-28V DC 2.25A 5.00A
TB6 230V AC 200-375V DC 0.50A 1.00A TB6
380-480V AC 400-750V DC 0.25A 0.50A
1 The power source used to drive a power supply must be capable of providing the peak current at
startup. A “flat“ current or power limit is acceptable, but a foldback current limit may trip at startup,
never allowing the supply to start.
Auxiliary Inputs – TB4,
TB6