Module Connector To Rs-232 Cable Pin Assignments - 3Com NETBUILDER II Installation Manual

1-10 C 1: I
HAPTER NSTALLATION
Module Connector to
RS-232 Cable Pin
Assignments
CAUTION: When changing jumper settings on the module and when cabling the
module to devices, be aware that when the RS-232 3-Port cable is connected to the
module, the positioning of the three hydra cables carrying the port signals are not
visually in a direct or expected line with the location of the jumpers on the module to
which the signals correspond. (See Figure 1-1.)
4 Attach the end of the DTE-to-DCE adapter labeled "NB II" to the end of the 25-pin
connector on the cable. Connect the end of the adapter labeled "To DTE" to the DTE
device as shown in Figure 1-4. You can connect the adapter end directly to a DB-25
male connector on the DTE device or to a DB-25 male connector on a cable coming
from the DTE device.
CAUTION: Be sure to use the labels on the adapter to connect it properly. It is easy to
connect the adapter incorrectly, because both ends are female DB-25 connectors.
HSS RS-232
3-PORT
®
DTE/DCE
To DCE device
Figure 1-4 Attaching the DTE-to-DCE Adapter
You can connect each hydra head of the HSS RS-232 3-Port cable directly to an RS-232
interface. If you need an RS-232 extension cable, refer to Table 1-2 for the pin
assignments of the RS-232 cable.
Table 1-2 HSS RS-232 3-Port Module Connector and Cable Pin Assignments
RS-232 Port
Pinout
A B C Signal
1 18 35 GND
2 19 36 TD
5 22 39 TXC
13 30 46 TT
8 25 41 RTS
3 20 37 RD
9 26 42 CTS
6 23 40 RXC
11 28 44 DSR
10 27 43 DTR
12 29 45 DCD
16 33 49 LL
17 34 50 RL
STATUS
To DCE device
I/O Signal Description
- Shield
output Transmit Data
input Transmit Signal Element Timing
output Transmit Signal Element Timing
output Request to Send
input Receive Data
input Clear to Send
input Receive Signal Element Timing
input Data Set Ready
output Data Terminal Ready
input Receive Carrier Detect
output Local Loop-back
output Remote Loop-back
To DTE device
DTE-to-DCE adapter
RS-232 Cable
Pinout
(25 pin male)
1
2
15
24
4
3
5
17
6
20
8
18
21