Bay Technical Associates 529H - Manual (Page 15)

10
If you are interfacing a DCE device to a DTE device, you must use a
one-to-one straight cable as shown in
Figure 2 . If you are interfacing
a DCE device to a DCE device, or a DTE device to a DTE device, you
must use a crossed cable as shown in
Figure 3 . Input handshaking
lines are enabled if nothing is connected, allowing the system to
operate with only Tx, Rx and GND connected.
500H MODEL - DCE DTE DEVICE
MALE DB-25 FEMALE DB-25
500H MODEL - DCE DCE DEVICE
MALE DB-25 FEMALE DB-25
1
2
3
4
5
6
7
8
20
1
2
3
4
5
6
7
8
20
PGND
TXD
RXD
RTS
CTS
DSR
SGND
DCD
DTR
<
<
<
>
>
>
>
DTR
DCD
SGND
DSR
CTS
RTS
RXD
TXD
PGND
Figure 2 - 500H Series (DCE) to DTE Device
2
3
4
5
6
7
20
7
6
5
4
3
2 TXD
RXD
RTS
CTS
DSR
SGND
DTR DTR
SGND
DSR
CTS
RTS
RXD
TXD
20
DCD 8 DCD 8
Figure 3 - 500H Series (DCE) to DCE Device