Technogym EXCITE Run 500, Service Maintenance Manual

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RUN EXCITE-2008: Service & Maintenance Manual - rev. 1.3
Page 3.14
In addition, to protect the motor from overheating, each motor phase has a thermal cut-out
connected in series. If the temperature exceeds the threshold value, the thermal cut-outs open and
interrupt the circuit. The ALE/AT UL driver detects this condition as the opening of a NC external
contact. In such a case the ALE/AT UL driver halts the motor and outputs an alarm signal to the
display board which displays the “THE EQUIPMENT IS BLOCKED” message.
3.2.3. T
HE SIGNALS INVOLVED
The machine uses the following control signals:
•
RS-485 Signal
This is a digital signal exchanged between the ALE/AT UL driver and the display board.
•
Variable frequency VAC signal
This is the variable alternating-voltage signal output by theAT UL driver (pins 1-2-3 connector
J5) to supply the motor. Increasing the frequency of this signal increases the motor speed. The
frequency of the sinusoidal supply voltage sent by theAT UL driver to the motor can be viewed
on the display using the inverter manual test described at the paragraph: 6.2.2.2 “Man. Inverter
Test”.
•
Thermal cut-out signal
Each motor phase is equipped with a normally-closed thermal cutout which opens when the
temperature exceeds a preset threshold. The 3 thermal cutouts are connected in series and exit
the motor via a 2-wire cable connected to the ALE/AT UL driver (pins 4-5 of connector J5).
When this input signal is an open contact, the ALE/AT UL driver detects the alarm, halts the
motor and sends an alarm signal over the RS-485 line to the display board.