ADDENDUM TO ISSUE 4 OF THE AXXESS MANUALOCTOBER 1997

Page 36 of 73
RS-232-C Changes and Corrections

The CPU/MEM, CPU020/PCM, and Options Card

RS-232-C connection information described on pages

2–35 and 2–36 in the Issue 4 manual should be modi-

fied as follows:

Ifnece ssary, an eight-wire MOD-TAP modular a dapter

andan eight -wire reversing (inverting) line cord can be

used for special applicationsrequiring hardware flow

control. The pin functions of the AXXESS CPU/MEM

Card,CPU020/PCM Card, and Options Card RS-232-C

ports are listed in the following chart.

NOTE: The PC orout put device RS-232-C portsmust

beconfigured as Data TerminalEqui pment (DTE). The

AXXESS RS-232-C ports are always configured as

Data Carrier Equipment (DCE).

AXX. DB9 DB25
SIGNALNAME FUNCTION PIN PIN PIN
No Connection 1
No Connection 2
SignalGround ReferenceGround 3 5 7
TransmitDa ta(TXD) Data to Axxess 4 3 2
Data Term.Re ady (DTR)* Signal to Axxess* 5 7 4
ReceiveData (RXD) Data from Axxess 6 2 3
DataSet Ready (DSR) Signalfrom Axxess 7 6 6
(always true)
Clear To Send (CTS) Signal from Ax xess 8 8 5
*TheCPUCardRS--232--C port does not support DTR.All other
RS--232--Cports (MEM and CPU020/PCM) do supportDTR.

Softwareflow control adapters: The fol lowing wiring

diagramscan be used to build adapters that will, with a

line cord, connect one of the RS-232-C ports on the

CPU/MEM, CPU020/PCM, or Options Card(s) to the

DB9 or DB25port sfound on most PCs and output de-

vices.

AXXESS RS-232-C PC/OUTPUT DB25
7
2
6
3
8
20
1
2
3
4
5
6
7
8
(insidejac k)
GND
TXD
DTR*
RXD
RTS
CTS 4
5
GND
TXD
DTR
RXD
DSR
DCD
*TheCPUCardRS--232--C port does not support DTR.All
otherRS--232--C ports (MEM and CPU020/PCM)do support
DTR. DB25 internal jumpers: 4–5 and 20–6–8.
AXXESS RS-232-C PC/O UTPUT DB9
5
3
6
2
1
4
1
2
3
4
5
6
7
8
(insidejac k)
GND
TXD
DTR*
RXD
RTS
CTS 7
8
GND
TXD
DTR
RXD
DSR
DCD
*TheCPUCardRS--232--C port does not support DTR.All
otherRS--232--C ports (MEM and CPU020/PCM)do support
DTR.DB9 internal jumpers: 7–8 and 4–6–1.

Hardwareflow control adapters: The following wir-

ing diagrams can be used to build adapters that will,

with a line cord, connect one of the RS-232-C ports on

the CPU/MEM, CPU020/PCM, or Options Card(s) to

the DB9 or DB25 ports found on mostPCs and output

devices.

DSR
AXXESS RS-232-C PC/OUTPUT DB25
7
2
3
8
6
4
1
2
3
4
5
6
7
8
(insidejac k)
GND
TXD
DTR*
RXD
GND
TXD
RTS
DCD
RXD
DSR
*TheCPUCardRS--232--C port does not support DTR.All
otherRS--232--C ports (MEM and CPU020/PCM)do support
DTR.DB25 internal jumpers: 6–8.
CTS
N/C
N/C
5
CTS
DSR
AXXESS RS-232-C PC/O UTPUT DB9
5
3
2
1
6
7
1
2
3
4
5
6
7
8
(insidejac k)
GND
TXD
DTR*
RXD
GND
TXD
RTS
DCD
RXD
DSR
*TheCPUCardRS--232--C port does not support DTR.All
otherRS--232--C ports (MEM and CPU020/PCM)do support
DTR.DB9 internal jumpers: 6–1.
CTS
N/C
N/C
8
CTS

NOTE:When building adapters from thesediagrams, keep in mindthat the connections b etween the AXXESS RS-232-C

portand the DB9 or DB25 port include the modular adapterand a line cord. The co nnection must be made as indicated

in the diagram(correct pins connected) regardless of whethera reversing or non-reversing line cord is used.