Table of Contents
Advertisement
Preparation for Use
iSBC 432/100
Pin
1
2
4
6
8
10
12
13
14
Table 2-8. Serial 1/0 Connector
JI
Pin Assignments
Signal
Description
PROTECTIVE GND
Protective Chassis Ground
RXD
8251A receiver data input (RXD)
TXD
8251A transmitter data output (TXD)
cTs
2
8251 A Clear-to-send input (CTS)
RTs
2
8251A Request-to-send output (RTS)
DTR
3
8251 A Data Terminal Ready output (DTR)
DSR
3
8251A Data Set Ready input (DSR)
SIGGND
Signal Ground
NOTES:
1. All odd-numbered pins (1, 3, 5, ... , 25) are on the component side of the board. Pin 1 is the
right-most pin when viewed from the component side of the board with the extractors at the
top.
2. For applications without CTS capability, connect jumper 5-6. This routes 8251A RTS output to
8251A CTS input.
3. For applications without DSR capability, connect jumper 3-4. This routes 8251A DTR output to
8251 A DSR input.
For applications where ,cables may be made by the
user for the iSBC 432/ 100 board, it is important to
note that the mating connector for J 1 has 26 pins
whereas the RS-232-C connector has 25 pins. Conse-
quently, when connecting the 26-pin mating connec-
tor to 25-conductor flat cable, be sure that the cable
makes contact with pins 1 and 2 of the mating con-
nector and not with pin 26. Table 2-9 provides pin
correspondence between the board edge connector
(JI) and an RS-232-C connector. When attaching the
cable to JI, be sure that the PC connector is oriented
properly with respect to pin 1 on the edge connector.
(Refer to the footnote in table 2-8.)
In an Intellec system, install the iSBC 432/100 board
in any odd-numbered slot except slot I and attach the
appropfiate serial 1/0 cable assembly to the edge
connector JI .
2.16 BOARD INSTALLATION
2-12
Always turn off the computer system power
supply before installing or removing the
iSBC 432/ 100 board and before installing or
removing device interface cables. Failure to
take these precautions can result in damage
to the board.
Table 2-9. Connector
J
1 Vs RS-232-C
Pin Correspondence
PC Conn.
RS232C
PC Conn.
RS232C
J1
Conn.
J1
Conn.
1
14
14
7
2
1
15
21
3
15
16
8
4
2
17
22
5
16
18
9
6
3
19
23
7
17
20
10
8
4
21
24
9
18
22
11
10
5
23
25
11
19
24
12
12
6
25
N/C
13
20
26
13
Advertisement
Table of Contents
