RUN MED: Service & Maintenance Manual - rev. 1.0
Page 3.12
3.4.2. THE SIGNALS INVOLVED
The machine uses the following control signals:
• Emergency contact
This is the contact provided by the 2 emergency stop microswitches. They provide a NC contact
which opens when the emergency is pressed. This signal enters the display board (pins 3-6 and
2-6 of connector CN6).
• RS-485 Signal
This is a digital signal exchanged between the inverter and the display board.
• Emergency signal
This is the signal generated by the display board (pins 4 and 6 of connector CN6), sent to the
AT driver (pins 9 and 12 of connector J3). This signal is 0 Vdc under normal conditions, and
goes to 11.9 Vdc in the emergency condition.
• Reset signal
This is the signal generated by the display board (pins 5 and 6 of connector CN6), sent to the
AT driver (pins 10 and 12 of connector J3) to signal to the lower assembly the resumption of
normal operation following an emergency condition. This signal is 0 Vdc under normal
conditions and goes to approximately 8 Vdc for few seconds when the user presses a key.
When this happens, the display board resets the Emergency signal to 0 Vdc, thereby enabling
the AT driver to operate.
To Next Page
Loading...
