Technogym Jog Now Excite+ 700, Technical Service Manual

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JOG NOW : Service & maintenance manual - rev. 6.2
Page 3.21
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 driver detects this condition as the opening of a NC external contact. In
such a case the driver halts the motor and outputs an alarm signal to the CPU board which displays
the “THE EQUIPMENT IS BLOCKED” message.
3.22.11. T
HE SIGNALS INVOLVED
•
RS-485 Signal
This is a digital signal exchanged between the driver and the CPU board.
•
VAC Signal with variable frequency:
This is the variable alternating-voltage signal output by the driver (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 the driver to the motor can be viewed on the display using the
inverter manual test described at the paragraph: 6.1.2.2 “Man. Inverter Test”.
•
Cut-Out signal:
Each motor phase is equipped with a normally-closed thermal cut-out which opens when the
temperature exceeds a preset threshold. When this input signal is an open contact, the driver
detects the alarm, halts the motor and sends an alarm signal over the RS-485 line to the CPU
board.