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KTD-N0876-0
7.7 COM1/COM2 (J23/J22)
Two serial ports provide asynchronous serial communication via RS-232
interfaces. The connector is type Pinrex 512-90-10GBE5 or similar.
The
pinout of Serial ports COM1 and COM2 is as follows:
Note Ioh/Iol Type Signal
-
-
-
Note 1: The COM1 and COM4 5V supply is fused with a common 1.1A resettable fuse.
The typical definition of the signals in the COM ports is as follows:
Signal
Description
Transmitted Data, sends data to the communications link. The signal is set to the marking state
TxD
(-12V) on hardware reset when the transmitter is empty or when loop mode operation is initiated.
RxD
Received Data, receives data from the communications link.
Data Terminal Ready, indicates to the modem etc. that the on-board UART is ready to establish
DTR
a communication link.
DSR
Data Set Ready, indicates that the modem etc. is ready to establish a communications link.
Request To Send, indicates to the modem etc. that the on-board UART is ready to exchange
RTS
data.
CTS
Clear To Send, indicates that the modem or data set is ready to exchange data.
DCD
Data Carrier Detect, indicates that the modem or data set has detected the data carrier.
RI
Ring Indicator, indicates that the modem has received a ringing signal from the telephone line.
Available cable kit
PN 821017 - 100 mm or PN 821016 - 200 mm
Page 36
PIN
I
DCD
1 2
I
RxD
3 4
O
TxD
5 6
O
DTR
7 8
PWR
GND
9 10
:
(DB9 adapter cables)
KTA75/Flex Users Guide
KTA75/Flex Users Guide
Connector Signal Definition
Signal Type Ioh/Iol Note
DSR
I
-
RTS
O
CTS
I
-
RI
I
-
5V
PWR
-
1
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