110502
PRODUCT MANUAL EPX-C380
27
SERIAL
J18 - COM1, COM2, COM3, COM4
Visual
Index
PCB Connector:
MOLEX 502046-4070 (J18)
Mating Connector:
MOLEX 503110-4000 (Housing)
MOLEX 501930-1100 (Crimp)
COM1, COM2, COM3, COM4 [DB9 Male]
1
5
6
9
Pin
RS-232
RS-422
RS-485
1
DCD
N/A
N/A
2
RX
TX+
TX/RX+
3
TX
TX-
TX/RX-
4
DTR
N/A
N/A
5
GND
GND
GND
6
DSR
RX+
N/A
7
RTS
RX-
N/A
8
CTR
N/A
N/A
9
RI
N/A
N/A
All ports are configured as Data Terminal Equipment (DTE). Both the send and receive registers of each port have a
16-byte FIFO. All serial ports have 16C550-compatible UARTs. The RS-232 has a charge pump to generate the plus
and minus voltages so the EPX-C380 only re5V to operate. An independent, software programmable baud rate
generator is selectable from 50 through 115.2 kbps. Individual modem handshake control signals are supported for all
ports.
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
□
□
□
□
□
□
□
□
□
□
□
□
□
□
□
□
□
□
□
□
□
□
□
□
□
□
□
□
□
□
□
□
□
□
□
□
□
□
□
□
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
DCD (COM1)
RXD (COM1)
TXD (COM1)
DTR (COM1)
GND
DCD (COM2)
RXD (COM2)
TXD (COM2)
DTR (COM2)
GND
DCD (COM3)
RXD (COM3)
TXD (COM3)
DTR (COM3)
GND
DCD (COM4)
RXD (COM4)
TXD (COM4)
DTR (COM4)
GND
DSR (COM1)
RTS (COM1)
CTS (COM1)
RI (COM1)
GND
DSR (COM2)
RTS (COM2)
CTS (COM2)
RI (COM2)
GND
DSR (COM3)
RTS (COM3)
CTS (COM3)
RI (COM3)
GND
DSR (COM4)
RTS (COM4)
CTS (COM4)
RI (COM4)
GND
J18
Preliminary
