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MB1 User Manual
© 2016 Expert Electronics
CONNECTIONS
2.6.3
COM
Out # Out put name Descript ion
Not e
1
DCD
Data Carrier Detect - DCE is receiving a carrier from a
remote DCE
Input
2
RxD
Received Data - Carries data from DCE to DTE
Input
3
TxD
Transmitted Data - Carries data from DTE to DCE
Output
4
DTR
Data Terminal Ready - DTE is ready to receive, initiate, or
continue a call
Output
5
GND
Ground
--
6
DSR
Data Set Ready - DCE is ready to receive commands or
data
Input
7
RTS
Request To Send - DTE requests the DCE prepare to
transmit data
Output
8
CTS
Clear To Send - DCE is ready to accept data from the
DTE
Input
9
RI
Ring Indicator - DCE has detected an incoming ring signal
on the telephone line
Input
