HEIDENHAIN TNC 306 Technical Manual User Manual
Page 425
8-12
TNC 406/TNC 306
2 TNC data interfaces
3/97
Control and signal lines:
DCD (Data Carrier Detect):
Received signal level. The DCD signal indicates
to the transmitter that the information received
at the receiver lies within the defined level.
The DCD signal (pin 8) is not used by the TNC,
i.e. the TNC delivers no signal from pin 8.
DTR (Data Terminal Ready):
This signal shows that the TNC is ready for service
(e.g. receiving buffer full => DTR = Low).
DSR (Data Set Ready):
Peripheral ready for service.
RTS (Request to Send):
Hardware handshake:
Output of the receiving unit
CTS (Clear to Send):
Hardware handshake:
Output of the transmitting unit
Earth conductor (cables for power supply):
Chassis GND:
Housing connection
Signal GND:
0-volt lines for all signals
Chassis GND
Transmitted data TxD
Received data RxD
Switch on transmission unit RTS
Operational readiness DSR
Transmission readiness CTS
Received signal level DCD
Signal ground GND
Terminal unit ready for service DTR
Peripheral
TNC