CP-RIO6-001/-DD-216/-HD/-HD-216
Functional Description
ID 1043-5620, Rev. 2.0
Page 2 - 9
2.1.5
COM Interfaces
The CP-RIO6-001/-DD-216/-HD/-HD-216 rear I/O module provides two COM ports for con-
necting RS-232 (COMA) and RS-232/RS-422 (COMB) devices, depending on the CPU board.
The following figures and tables provide pinout information for the onboard COM connectors
J15 (COM B) and J16 (COM A).
Figure 2-7: Serial Port Connector J15/J16
Table 2-6: Serial Port Connector J15 (RS-232/RS-422) Pinout
RS-232 SIGNALING
PIN
RS-422 SIGNALING
I/O
DESCRIPTION
SIGNAL
SIGNAL
DESCRIPTION
I/O
I
Data carrier detect
DCD
1
RX+
Receive data +
I
I
Data send request
DSR
2
RX-
Receive data -
I
I
Receive data
RXD
3
NC
Not connected
--
O
Request to send
RTS
4
NC
Not connected
--
O
Transmit data
TXD
5
TX+
Transmit data +
O
I
Clear to send
CTS
6
TX-
Transmit data -
O
O
Data terminal ready
DTR
7
NC
Not connected
--
I
Ring indicator
RI
8
NC
Not connected
--
--
Signal ground
GND
9
NC
Not connected
--
--
Not connected
NC
10
NC
Not connected
--
Table 2-7: Serial Port Connector J16 (RS-232) Pinout
PIN
SIGNAL
DESCRIPTION
I/O
1
DCD
Data carrier detect
I
2
DSR
Data send request
I
3
RXD
Receive data
I
4
RTS
Request to send
O
5
TXD
Transmit data
O
6
CTS
Clear to send
I
7
DTR
Data terminal ready
O
8
RI
Ring indicator
I
9
GND
Signal ground
--
10
NC
Not connected
--
1
2
10
9
