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IRADK10
Electrical and mechanical description
The Printed wiring board is a double sided 100 x 160 mm
board using a mixed technology of SMT and through hole
components.
The layout of the connectors, indicators and user controls
is shown below in Figure 3.
HIGH VOLTAGE SIGNALS is the strip of pins with high
voltage PWM signals (i.e. the motor voltages).
POWER (J4) is the main connector with the AC 115/230V
power supply, earth connections and the motor (A-B-C)
connections.
RS-232 Serial
Link
R
G
Y
110V/220V(S3) is the selector switch for the input voltage
Power Switch (S2) is the power switch to turn ON/OFF the
system
RS-232 Serial Link:
A standard 9 pin D connector is used for the RS-232 serial
link.The pins used on this connector are the RxD, TxD, GND,
RTS, and DTR. The RTS and DTR signals provide sufficient
current to drive the opto-couplers. The current drawn from
these pins is far below permissible limits for the RS232 driv-
ers. The board will communicate with the GUI tool (supplied
with the board), if the drivers for the serial link are already
installed. Notice that either the COM1 or COM2 port of your
PC has to be available, the code will not work with COM3 or
COM4. The serial cable may be connected or disconnected
at any time without having to restart the computer.
LED board displays:
230
Yellow, Green and Red LEDs are mounted at the edge of
the board. At power-up, the auxiliary power supply will oper-
ate if the input voltage exceeds 85% of rated voltage. The
yellow LED will flash for normal bus voltages above 60VDC
indicating “DC bus voltage present”. If the drive is enabled
Figure 3 Connectors and indicators layout
RS-232 Serial Link : 9-pin female standard shell (DB9)
connector provides for an opto-isolated RS232 serial link
with the PC at a fixed rate of 2400 Baud, no parity, 1S +
1S.
R,G and Y are three LED diodes (red, green, yellow) to
reflect the drive status.
The yellow diode blinks when the bus voltage is present.
The red diode lights on fault and the green one lights
when the drive is ON.
PWM SIGNALS is the strip of pins with low voltage (TTL)
signals.
www.irf.com
and the motor is being driven, the green LED stays ON indi-
cating “Drive operational”. In the event of a fault condition,
the red LED activates indicating “Fault condition”and the
green LED extinguishes.
To restart the system the user can perform one of the
following operations:
1) Press the RESET push-button on the board (see
below);
2) Click on the reset command in the GUI (PC);
3) Remove and re-apply AC power.
The reset button is located next to the serial link connector.
Press and hold this button for 1 second to restart the micro
processor.
4
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