GMX SAB-9D User manual

GMX 5AB-9D
RS-232 Ser1a1 Adapter Board
W1 th 9-Pin "D
ft
Connectors
User's Manua1
COPYRIGHT 01986
GKX Inc.
1337 W. 37th-PLace
Chicago. IL 60609
312-927-5510 * TWX 910-221-4055
AU.. Rlghts Reserved
Reproduction of this manuaJ.. lri whol.e or part. by any means,without
express written permission from GMX :Inc. 15 strictJ.y -prohibited.
GMX~ 15 a trademark of GMX Inc. Chicago. IL 60609

GMX SAB-9D
9-Pin RS-232 Serial Adapter Board
User's Manual
Revision History
Revision A
Revision B
<91986 GMX· INC
02/24/86
01/07/87
il
First general release
Add info on single supply
version (Rev. B boards).
Rev B

GMX SAB-9D
9-Pin R5-232 SeriaI Adapter Board
User's Manual
CONTENTS
SECTION
1: D8-9 CONNEC TOR PINOUTS
PAGE
1-1: Fixed Pinout Connectors (Pl, P2, & P3) ..... l
1-2: Programmable Pinout Connecter (P4) .•....... 1
1-3: CTS Pullup Options .•••••.••.•...••.•..•.•.. 5
2: CONNECTOR PORT ASSIGNMENTS •.....•......••..•.• 6
3: HOST INTERFACE
3-1: Host Connections ••.•••••..•....•...•.....•• 7
3-2: Power Requirements •.•.••.••.•••.........••. 7
4: MOUNTING THE ADAPTER BOARD ........•......•...• 7
APENDICIES
Appendix A: Mounting Dimensions ..•..••••....• 9
Appendix B: Component Layout .••...•.•.••..•.• 11
Appendix C: Logic Diagram .••.•••....•...••.••. 12
FIGURES
1-1: Connecter Pinouts for Pl, P2, and P3 ..... 1
1-2: Adapter Cable Configuration .•.......•.... 2
1-3: Jumper Area JA-l ..•...•...•........•..... 3
1-4: JA-IB Configuration fer Terminals (DTE) .. 3
1-5: JA-IB Configurations for Modems (DCE) .... 4
1-6: JA-IB Pinout .•••..........•............•. 5
1-7: JA-IA CTS Pullup Jumpers 5
1-8: I/O Connecter Port Assignments 6
@1986 GMX INC
iii
Rev B

@1986 GMXINC
iv
Rev B

INTRODUCTION
This manual contains information on the initial setup and and
operation of the GMX SAB-9B, 9-Pin RS-232 Interface Adapter Board.
The board provides level-shifting between TTL level and standard
RS-232 signal levels for up te 4 seriaI I/O ports. Separate 9-pin,
D-type connectors provide access te each port.
The "0" connector pinouts are arranged so that an off-the-shelf
cable (a standard IBM PC AT communications cable) can be used to adapt
the 9-pin connectors to the 25-pin "0" connectors used on most RS-232
devices.
Three of the four connectors have fixed pinouts, arranged 50 that
the adapter cable can be connected te a standard RS-232 terminal or
other device configured as Data Terminal Equipment (OTE).
The fourth connecter has programmable pinouts, and the same
adapter cable can be used for either DTE .or Data Communication
Equipment (DCE). This connector a1so has adqitional signais available
for modem control, etc.
A 50-pin ribbon cable connects the board te the serial I/O
connector on a host such as the GMX Micro-20 sac or sac-ss 8-port
Seriai Board. This ribbon cable carries the TTL level 1/0 signaIs as
well as the supply voltages required by the board.
The RS-232 inputs and outputs meet the RS-232C specifications.
The negative supply voltage, required by the standard, i5 generated
on-board by the interface parts themselves.
********** CAUTION **********
Early revisions of the SAB-90 (Pre-Revision 'B') are subject to
damage from improper power supply sequencin'g. The RS-232
driver/receivers can be damaged if the +12 Volt supply is applied
before the +5 Volt supply. Tc minimize the chances of damage te the
board, never connect or disconnect the SAB-9D from the GMX Micro-20
while power is applied to the board. Revision 'B
t
and later versions
of the board use a single power supply and are not subject to this
problem.
@1986 GMX INC
v
Rev B

<D1986 GMX. It·~C
User Notes
vi
Rev B

SECTION 1: DB-9 CONNECTOR PINOUTS
The connectors used are standard, 9-pin male D-type connectors.
Refer to Appendix B for the ~ocations of the connectors.
1-1: Fixed Pinout Connectors (Pl, P2, and P3)
Figure 1-1 shows the pinout of 9-pin connectors Pl, P2, and P3
and the pinout of the DB-25 connector when the 9-pin ta 25-pin adapter
cable described belew is used. All pins not listed in the table are
unconnecte·d.
Connector Pinouts for Pl. P2. and P3 CD
9-pin 25-pin
Signal Direction
pin #'
pin#@
23Transmit
Data (lX)
From Computer
32
Receive Data (RX)
To Co,mputer
420
Flow Control (CTS)
To Computer
57
Signal Ground
Both
85
Flow Control (DTR) From Computer
Notes: <D
If JA-l Bis configured as shown in Fig.
1-4, P4 also matches this pinout.
@ 25- pin pinout is obtained by using the
9
ta 25-pin adapter cable described ln
the text and in Figure 1-2.
Figure 1-1
The pinout of the· 9-pin connectors was chosen 50 that an
ofr-the-shelf cable assembly can be used ta adapt them to -the 25-pin
"0" connectors used on most serial devices. This cable allows Pl
through P3 to be connected directly te a terminal or other device
configured as Data Terminal Equipment (OTE). Figure 1-2 shows the
configuration of the cable, which 1s available from a variety of
sources as an "IBM PC AT Communications Cable" (IBM part #6450217, or
equivalent).
Note: Although this cable is referred to as a "communication" or
"modem" cable in its normal. appl.ication, the pinout of connectors Pl,
P2, and P3 on the SAB-9D is arranged sa that the cable can be
·connected directly to a terminal 'or other device configured as DTE.
@1986 GMX INC
-1-
Rev. E

Adapter Cable Wiring
ThIs cable can be used to connoct teorm1nals to
P l-P3, or aterminal or modem ta P4.
9-Pin "0"
Connector
(fsmala) -
~
18
23
32
4
20
57
66
74
85
9
22
-
----
25-Pin "DU
Connector
FIgure /-2
Custom cables can also be constructed, using Figure 1-2 as a
guide. A minimum cable configuration requires both transmit and
receive data, as we11 as signal ground '(pins 2, 3, and 5 on the D8-9
connector). The function of the two flow control lines 1s determined
by the software being used and flow control (handshaking) may or may
not be supported. Refer ta the appropriate software documentation for
information on flow control. Generally, eTS line (pin 4) controls
output from the computer to external devices, and the DTR line (pin 8)
controls output from external devices to the computer.
1-2: Programmable Pinout Connector (P4)
Connector P4 can be configured so that the adapter cable shown in
Figure 1-2 can be used for either a terminal (OTE) or amodem (OeE,
Data Communications Equipment).
Jumper area JA-IB is used to program the pinout of connector P4.
Figure 1-3 shows JA-l, which is divided into two sections: JA-IA and
JA-1B.
@1986 GMX INC
-2-
Rev. B

crs Pullup
Options
Connector P1Configuration
Options
.•••...••.....••.....•..•••...•.•....•...•.••...••...•
Figure I-J
If JA-1B 1s configured as shown in Figure 1-4, the pinout of connector
P4 matches the pinout of connectors Pl, P2, ànd P3. See the section
on P1-P3 for more information on this configuration.
JA-l BConflgured so P4 pinout matches
Plnout
of Pl - P3.
2
1m
b1l*llà 0 &SSS &SS3 _mm 26
tu f21 ffi1 till 0 0 0 ~ IIIIIlIItlD 2S
1 1 1 fi.· }Install jumper blocks
li < at these locations.
crs Pullup options
for a11 connectors. ~} LocatIons where spare
(see text) jumper bl(d~s may
be stored.
Figure 1-4
Figure 1-5 shows a typical. J-A-1B configuration, ·and the resul.ting
9 and 25-pin connector pinouts, for connecting amodem or other device
configured as OCE to 24.
@1986 GMX INC
-3-
Rev. B

Typical JA-l B configuration
for connecting 8 modem to P4.
2
1
~ ~ ~. ~ ~ ~ Il ~ ;" 0 ~ 16 ~:.
1 1 1 n,~:,.~,} Instal1 jumper blacks
IJ at these locatlons.
CTS Pulllip Options
for aIl connectors. ~} Indfcateslocations where
(see text) spare jumper blocKs may
be stored.
Connector Pinouts
9-pin 25-pin
Signal
Direction
p1n #0
p1n#@
18
Modem Control, (OCD)
To Computer
23
Receive Data ( RX)
To Computer
32Transmit
Data (TX)
From Com'puter
420
Modem Control (RTS) From Com puter
57
Signal 6round
Both
85
Flow Control (CrS)
Ta Computer
Notes: <D
P4only.
@ 25-ptn p1nout 15 obtatned by us1ng the
9 to 25-pin eœpter cable descr\bed in
the text and in Figure 1-2.
FIgure 1-5
Connector P4 provides signals not available on the ether three
connectors. These signals are used for modem control or other special
applications.
Note: The function of the modem control signals i5 determined by the
software being used. When connecting a modem, refer to the software
documentation te determine what functions are supported by the
software.
Figure 1-6 shows the pinout of jumper area JA-1B. By installing
jumper blacks and/or wire jumpers at JA-1B, P4can be arranged to
connect any of the IIO signals to any of the available connector pins.
@1986 GMX INC
-4-
Rev. B