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

Jumper Area JA-l B Pinout
1/0 Connector
Pins
25-pin P4
JA-)
pin no. Pin
Pin
see note no. no.
6 6
10
22 911
81
14
47
17
20 4 20
58
21
2324
322S
Port 3 1/0 Signal PIns
JA-l
Pin
Name
Function
Direction
no.
9IP5
Undefined
To Computer
13
DCO
Modem Control
To Computer
18
RTS
Modem Control
From Computer
19 DTR Flow Control From Computer
22
CTS
Flow Control
Ta Computer
23
TX
Transmit Data
From Computer
26 RX Reœive Data
To Computer
Note: 25-pin connector pinout applies when
the 9 to 25-pin fd,3pter cable described
in the text and in Figure 1-2 is used.
Figure 1-6
Note: Pin 5 of connector P4 is permanently connected to signal ground.
1-3: CTS Pullup Options
The CTS flow control (handshake) input is normally used to start
and stop output from computer to an external device. When CTS is
asserted (high), output is enabled; when it 1s deasserted (low),
output is inhibited. CTS 1s normally driven by the RTS or DTR output
from the receiving device to prevent the computer from transmitting
when the device is unable to accept input.
Jumper area JA-l, section JA-IA provides the option of connecting
a pullup resistor to the CTS input of each of the four serial ports.
Figure 1-7 shows the position of the jumpers at JA-IA for each of the
four ports.
JA-l A CTS Pullup Jumpers
~ 1m0 ft 1 i~ ~ ~ ~ ~ ~ ~ ~ ~ l ~~
Port 0 --.J .11 LPort 3
(Pl) (P4)
Port 1 .Port 2
(P2) (P3)
Figure 1-7
-5-
Rev. B

When a jumper 1s installed, a pullup is connected to the CT5 line
of the associated port. This will force CTS to the high (asserted)
state; unless it isdriven low by an externa1 device cennected te the
line. When no jumper 1s installed, the CTS will be forced ta the 16w
(deaS5erted) state, unless it is driven high by an external device
connected to the line.
If a particular port 15 being used without flow control (CTS not
connected), then the CTS pullup jumper for that port must be installed
to assert CTS and enable transmission from the port.
If a port i5 being used with flow control (CTS connected), then
the CTS pullup jumper for that port may be in5talled or removed as
desired. Depending on whether or nct the jumper 15 installed, the
port will react in one of two ways. If the jumper is installed,
transmission from the port will be enabled even if the external device
is turned off or disconnected from the computer. If the jumper i5
removed, transmission from the port wil1be inhibited wh en the device
is disconnected or turned off.
Note: The presence or absence of the CTS pullup jumper does not affect
normal flow control (handshake) function when an external device is
connected to the CTS line.
SECTION 2: 1/0 CONNECTOR PORT ASSIGNMENTS
Each 9-pin "0" connector 1s aS5igned te one seriaI IIO port on
the host board. Figure 2-1 shows the port assignment for each of the
four connectors. Refer to Appendix B, the component layout, for the
location of the connectors.
SeriaI 1/0 Port
Connector Assignments
Port 0
Connector P1
Port 1
Connector P2
Port 2
Connector P3
Port 3
Con nectar P4
Figure 2-/
When the SAS-90 i5 connected to the serial ports on a GMX
Micro-20 sac, connector Pl (port 0) is used for the system console
terminal.
@1986 GMX INC
-6-
Rev. B

SECTION 3: HOST INTERFACE
3-1: ·Host Connections
A 50-pin ribbon cable and connector, soldered to the adapter
board, mates with the seriai I/O connector on the hast board and
carries signals and power ta the SAB-9D~ When connecting the cable ta
the hast, be sure te observe proper polarity (pin 1). Refer to
Appendix B for the location of pin l on the SAB-9D hast connector
(PS) •
If additional cable length 1s required, an extender cable with
the appropriate connectors may be used with the supplied cable;
however~ the cable length should be kept as short as possible te
prevent noise pickup and minimize cable loading effects. Speci~~
versions, with longer or shorter cables, are available on special
arder for quantity users. Contact GMX Inc. for priee and
availabil.ity.
3-2: SAB-9D Power Requirements
Since the SAB-9D Serial Adapter Board draws its power from the
hast board, the current requirements of the SAB-9D should be
considered when calculating the total power requirements of the host
system. Several different versions of the board have been
manufactured. Boards with no reV1s~on letter following the part
number etched on the solder side of the board (e.g. 24-0092), and
those with the letter 'A' (i.e. 24-0092A) use bath +5 Volt and +12
Volt supplies. Their current requirements are typically under 10 ma.
for the 5 Volt supply, and under 50 ma. for the +12 Volt supply.
Boards with revision letter 'B' (i.e. 24-0092B) or higher use only
the +5 Volt supply. Rev. Band later boards generate both the +12
and -12 volt supplies required by RS-232 on-board. S~pply current
requirements for these boards are typically under 100 ma. on the +5
volt supply.
SECTION 4: MOUNTING THE ADAPTER BOARD
Append1x A shows the dimensions and locations of the connectors
and mount1ng ho~es. A typical panel cutout for the "ott connectors 15
a1so shown. Other cutouts can be used, as long as sufficient
clearance1s provided 50 that the connectors can be fu~ly mated.
The DB-9 connectors have 4-40 threaded inserts and jackscrews for
securing the mating cable connectors. The jackscrews can also be used
te mount the board te a cabinet or panel.
Twe mounting holes (in the rear corners of the circuit board),
along with the hales used ta mount the 9-pin connectors te the board,
can be used two provide additional support or io mount the board
parallel to a flat surface.
@1986 GMX INC
-7-
Rev. B

The maximum recommended panel thickness, when mounting .the board
with the supplied jackscrews, is .062 inches. Thicker panels may
prevent full connecter irisertion unless screws with shorter heads are
used. For thinner panels, washers under the screw heads or screws
with longer heads may be needed.
Regardless of the method used to mount the adapter board, it
should be fastened securely to a rigid surface te prevent flexing of
the circuit board during connector insertion ~nd removal.
When mounting the board~ be sure that there 15 sufficient
clearance around the mounting screws, brackets, panels, etc. to
prevent short circuits te the PC board or components.
@1986 GMX INC
-8-
Rev. B

SAB-9D Mounting Dimensions
-
N
N
-
t(')
N..
~
f+- .984
L
~ L'"
.984
L
·LI ..
.984
L .. L,
..
.984--+
, ri'
r
ri'
r r
oe ........ )0oe
... • ... '0o
t:: .... )0
ot:: .... )0
+-.21
~
~
llf--4 --- 5.30 -------l'~~
I~~ --------- 5.10 -.....;-.-------~ .115
....---------------------+:='"'1
T'
.125Dia.Hole-2Places ----~ T
1.125
1.575 l
Component 51de
10
00 00 Or--O---~~
.375
""'U+J....,---.,..J+.u-u.;.J-,---~f.J..I'1..1.f-1-,...----,..~""'"'"t-'""'r---'T""'1""'o.r- --*-
,~---
4-40 Thrd Insert - 8 Places
--------/
.984
r-.
806
1
.4.....-;9--+-< ?~
.120
Typical Panel Cutout

l'
,1
•
11
PI
II
14
•
a
12
•
1
Il
•"
P4
TXltl
P2
4
RIl 1
TR 1•
•
-;
12
,DeDISI
0
•
4'
••
~
P3
Il
•Il'AN: DRIV€1l
12
GMX INC.
1'" w31lh PL OIICAGO IL 604>09
2-25-86
GMIl SA8-9D '·PIN RS·2':
SOIIAL ADAPTER eOARD
LZ4-009Z
PROPRIETARY IoCAT L ALL RIGHTS
RESERVED ~ GIoCIl INC. 1985

COMPONENT LAYOUT

GMX INC_
1337 W 37th PL CHICAGO, IL 60~~~
REV_ B. 1-20-81
GMX SAD-9D 9-PIN RS-232
SfRIAl. AOAPTfR BOARD
5VOLT ONLY·V[flS-ION-·Tî-2"4-ÔO":H
"PiIOPRIETARYï;iÙ'L- Ali -RIGH1-S-- --
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P4
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1 /;!!>olt
98• 3
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P3
1/
14
8
SPARE DRIVER
4

©1986 GMX INC. 24-00928
; ~.