July 2013 10.6 iTNC Serial Data Interfaces 1901
Signal designation One must differentiate between the following types of lines and their signals:
Data lines:
• TxD Transmitted data
• RxD Received data
Control and signal lines:
• DCD (Data Carrier Detect):
Received signal level. The receiver signals that the information it has
received lies within the defined level. The DCD signal is not used by the
iTNC. The iTNC delivers no signal from this pin.
• DTR (Data Terminal Ready):
iTNC ready / not ready for service (e.g. the receiving buffer is full, the
signal DTR indicates "LOW").
• DSR (Data Set Ready):
Peripheral device ready / not ready for service.
• RTS (Request to Send):
Switch transmission unit on. iTNC wishes to transmit data.
• CTS (Clear to Send):
Readiness for transmission. The peripheral wishes to transmit data.
Ground conductors (lines for power supply):
• Chassis GND:
Housing connection
• Signal GND:
0 V lines for all signals
Pin layout Keep in mind that there might be a difference between the pin layout of the
MC 42x(B) and the adapter block.
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