Moxa Technologies CP-118EL - Manual (Page 57)

PCI Express Board User’s Manual Pin Assignments
5-2
CP-118EL
The CP-118EL board has a female SCSI VHDCI68 connector on the board, with various
connection options available for connecting from the board to your serial devices. In this chapter,
we provide pin assignments for the board side connector, as well as pin assignments for device
side connectors for the different connection options.
The CP-118EL board supports RS-232, RS-422, 4-wire RS-485, and 2-wire RS-485. Note that the
RS-422 standard uses a balanced voltage digital interface to allow 9600 bps communication over
cables of up to 4000 feet in length. You can connect ten receivers to one driver for broadcasting
systems. The RS-485 standard is an enhanced version of the RS-422 balanced line standard. It
allows multiple drivers and receivers to work on a multidrop network. A maximum of 32 drivers
and 32 receivers can be set up on a multidrop network. The CP-118EL board supports both 2-wire
half-duplex and 4-wire full-duplex RS-485 communications. In 2-wire RS-485, Data+/- pins are
used for both data transmitting and receiving.
Board Side Pin Assignments—Female SCSI VHDCI68
1 34
35 68
RS-232
Pin Signal Pin Signal Pin Signal Pin Signal Pin Signal Pin Signal
1 RxD6 13 DCD4 25 TxD2 37 RI7 49 RI5 61 TxD1
2 CTS6 14 RTS4 26 GND 38 RTS7 50 CTS5 62 DSR1
3 RI6 15 RI4 27 TxD0 39 DCD7 51 RxD5 63 DTR1
4 RTS6 16 CTS4 28 DSR0 40 DTR7 52 RxD3 64 DCD1
5 DCD6 17 RxD4 29 DTR0 41 DSR7 53 CTS3 65 RTS1
6 DTR6 18 RxD2 30 DCD0 42 TxD7 54 RI3 66 RI1
7 DSR6 19 CTS2 31 RTS0 43 GND 55 RTS3 67 CTS1
8 TxD6 20 RI2 32 RI0 44 TxD5 56 DCD3 68 RxD1
9 GND 21 RTS2 33 CTS0 45 DSR5 57 DTR3
10 TxD4 22 DCD2 34 RxD0 46 DTR5 58 DSR3
11 DSR4 23 DTR2 35 RxD7 47 DCD5 59 TxD3
12 DTR4 24 DSR2 36 CTS7 48 RTS5 60 GND