JOG EXCITE: Service & Maintenance Manual - rev. 1.1
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 1-2 of
connector CN8).
• 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 7-1 of connector CN7), sent to the AT
driver (pins 9-2 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 8-1 of connector CN7), sent to the AT
driver (pins 10-2 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.
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