Main board backside



This table lists the outbound connectors that are labelled on the Main board backside diagram:

Outbound Connectors
X7 (IO connector)
  1. Optocoupler input +
  2. Optocoupler input - (both connected = active)
  3. Relay NC (normally closed contact)
  4. Relay Common
  5. Relay NO (normally open contact)
X8 (COM1)
  1. 5V
  2. RxD
  3. TxD
  4. Connected to 6
  5. GND
  6. RTS
  7. CTS
  8. -
X9 (COM3)
  1. 5V
  2. RxD (of the terminal)
  3. TxD (of the terminal)
  4. Connected to 6
  5. GND
  6. RTS
  7. CTS
  8. -