Black Box SW540A-R3 User manual

1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax [phone]
© Copyright 2000. Black Box Corporation. All rights reserved.

Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX
FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax [phone]
Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: [email protected]
CUSTOMER
SUPPORT
INFORMATION
MARCH 2000
SW540A-R3
SW541C
Code Operated Matrix Switch
and 4-Port Expansion Board
012345678 PWR
STATUS
CODE OPERATED
MATRIX SWITCH

Code Operated Matrix Switch
2
FEDERAL COMMUNICATIONS COMMISSION
RADIO FREQUENCY INTERFERENCE STATEMENT
This equipment generates, uses, and can radiate radio frequency energy and if not installed
and used properly, that is, in strict accordance with the manufacturer’s instructions, may cause
interference to radio communication. It has been tested and found to comply with the limits for
a Class A computing device in accordance with the specifications in Subpart J of Part 15 of FCC
rules, which are designed to provide reasonable protection against such interference when
the equipment is operated in a commercial environment. Operation of this equipment in a
residential area is likely to cause interference, in which case the user at his own expense will
be required to take whatever measures may be necessary to correct the interference.
Caution:
Changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
This digital apparatus does not exceed the Class A limits for radio noise emission from digital apparatus set out in
the Radio Interference Regulation of Industry Canada.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables aux appareils
numériques de la classe A prescrites dans le Règlement sur le brouillage radioélectrique édicté par Industrie Canada.
TRADEMARKS
HP®is a registered trademark of Hewlett-Packard.
LaserJet™is a registered trademark of Hewlett-Packard.
DEC®is a registered trademark of Compaq Corporation.
This product is CE certified. This certificate indicates that the product is suitable for use in commercial
and light industrial environments as defined in EN 50081-1:1992.
NOTE
Shielded interface cables must be used with this product. Call Technical Support at 724-746-5500
for guidance in choosing cables.

CONTENTS
3
Hardware Section
1. Specifications......................................................................................5
2. Introduction .......................................................................................6
3. Installation..........................................................................................7
3.1 Setting the Internal DIP Switches ..............................................7
3.2 Configuring the Shunt Jumpers for DTE or DCE ....................9
3.3 Connecting Devices to the Switch’s Parts ................................10
4. Operation .........................................................................................11
4.1 Front-Panel Indicators ..............................................................11
4.2 Reset Button ..............................................................................11
4.3 ASCII Control Codes ................................................................11
4.4 Break Detection ........................................................................14
5. Troubleshooting...............................................................................15
5.1 Self-Tests ....................................................................................15
5.2 Sample Test Program................................................................16
Appendix A ASCII Codes ..................................................................17
Appendix B Installing the 4-Port Expansion Card...........................18
Appendix C Quick Setup Guide.........................................................19
LINKUP Software
1. Introduction .....................................................................................21
1.1 What Is LINKUP? ......................................................................21
12. Hardware Requirements...........................................................21
2. Setup and Configuration.................................................................23
2.1 Files on the LINKUP disk .........................................................23
2.2 Making a Backup Copy .............................................................23
2.3 Installing the LINKUP Files on Your Hard Drive....................24
2.4 Modifying your AUTEXEC.BAT File .......................................24
2.5 Default Settings .........................................................................25
2.6 Configuring the COMS, LINKUP, and DOS ...........................25
3. Running LINKUP ............................................................................27
3.1 Hints for Using LINKUP and the COMS ................................27
3.2 Sending Data with DOS............................................................27
3.3 Sending Data with Your Application Programs.......................27
4. Troubleshooting...............................................................................29
Contents

Code Operated Matrix Switch
4
Hardware Section
012345678 PWR
STATUS
CODE OPERATED
MATRIX SWITCH

5
CHAPTER 1: Specifications
Leads Supported — 1-8, 20, 22
Connectors — Base Unit: (5) DB25S 25-pin sub-D female; Unit with 4-Port
Expansion Board: (9) DB25S 25-pin sub-D female
Indicators — 10 LEDs: (1) Power, (9) Port Activity showing Receive activity
Interface — Asynchronous RS-232C/V.24 DTE/DCE (each port individually
selectable)
Speeds — 110 to 19,200 bps (each port individually selectable)
Memory — 31K buffer
Enclosure — Steel
Operating Temperature — 32 to 113°F (0 to 45°C)
Storage Temperature — -4 to 158°F (-20 to 70°C)
Humidity — 0 to 95% relative, noncondensing
Mean Time Between Failures — 20,000 hours for standard Switch (Ground Benign
Environment), 16,000 hours for standard Switch with 4-Port Expansion Board
Power — 115-VAC, 60 Hz, at 175 mA (230-VAC, 50-Hz version available)
Size — 2.3"H x 11.2"W x 12.1"D (5.8 x 28.4 x 30.7 cm)
Weight — 9.6 lb. (4.3 kg) for standard Switch, 10.2 lb. (4.6 kg) for standard Switch
with 4-Port Expansion Board
The Code Operated Matrix Switch (COMS for short) is a versatile microprocessor-
1. Specifications

Code Operated Matrix Switch
6
controlled electronic switch. It allows any of its
ports to communicate with any other connected
port, or any pair of ports to communicate
simultaneously.
For example, a number of terminals or
computers can share several peripheral devices,
such as printers or modems. A simple code from
any terminal or computer links it to the desired
peripheral.
Here’s another application: one computer is
connected to a laser printer, while another
computer is simultaneously connected to a dot-
matrix printer. Later, the printers could be swapped
(as in an X-switch configuration) without the need
to change or move any cables.
The standard Code Operated Matrix Switch has
five ports that support any combination of input,
output, or bidirectional devices. The Switch has 32K
of RAM with approximately 31K devoted to
buffering. The 4-Port Expansion Board
(Model SW541-C) provides four additional
input/output ports (see Appendix B for
instructions on setting it up).
This manual includes a quick-reference section,
Appendix C. If you’re familiar with the operation of
the COMS, use the charts in that section to set up
the Switch. If not, proceed through Sections 3, 4,
and 5.
NOTE: This manual will take you through installa-
tion, operation, and troubleshooting for the
Code Operated Matrix Switch in both the
five-port and nine-port versions. See
Appendix B for instructions on setting up
the 4-Port Expansion Board.
You’ll need an edged or pointed object small
enough to set DIP switches to install the Switch.
These are the steps to follow for installation:
1. Set the internal option DIP switches.
2. Configure shunt jumpers for DTE or DCE.
3. Connect devices to the switch ports.
4. Supply power to the Code Operated Matrix
Switch.
2. Introduction

7
CHAPTER 3: Installation
3.1 Setting the Internal DIP Switches
Remove the cover of the Switch’s enclosure to
expose the PC board.
Figure 1 shows the location of the Code Operated
Matrix Switch’s internal DIP switches. There are two
types:
1. Individual Port Switches (see Section 3.1.1)
2. System Switches (these apply to all ports; see
Section 3.1.2)
NOTE: DIP Switches may have different
designators to indicate the “ON” and “OFF”
settings. In this manual, “ON” is equivalent
to “Closed” and “OFF” is equivalent to
“Open.”
3.1.1 INDIVIDUAL PORT CONFIGURATIONS
A number of options can be configured for each
port individually. You can select:
• Baud rate: 110, 300, 600, 1200, 2400, 4800, 9600,
or 19,200 bps
• Parity: Even, odd, or none
• Data bits per word: 7 or 8
• Flow Control: Hardware (DTR/CTS) or software
(X-ON/X-OFF)
• Break detection: Break to disconnect or ignore
breaks
3. Installation
(BACK)
PORT 4 PORT 3 PORT 2 PORT 1 PORT 0
DTE
DCE
J7
U23 U20
J1
W1
VR1
RESET BUTTON
S1
R1
SW
G
SW
F
SW
E
SW
D
SW
C
SW
B
SW
A
SYSTEM SWITCHES
(SWF & SWG)
INDIVIDUAL PORT SWITCHES
STATUS INDICATORS
CH0CH1CH2CH3CH4 CH5CH6CH7 CH8 PWR
(FRONT)
DTE
DCE
DTE
DCE
DTE
DCE
DTE
DCE
OFF OFF OFF OFF OFF OFF OFF
PORT 4 PORT 3 PORT 2 PORT 1 PORT 0
Fig. 1. Internal Switch Locations for the Standard Code Operated Matrix Switch

Code Operated Matrix Switch
8
On the standard 5-port model, the DIP switches that
correspond to each port are:
• Port 0: SWA
• Port 1: SWB
• Port 2: SWC
• Port 3: SWD
• Port 4: SWE
For the 4-Port Expansion Board:
• Port 5: SWH
• Port 6: SWI
• Port 7: SWJ
• Port 8: SWK
Table 1 lists the individual options and settings for
each port switch.
3.1.2 SYSTEM CONFIGURATIONS
In the lower left corner of the printed circuit board
are two DIP switch banks, SWF and SWG, for
configuring the system. Switch SWG is reserved for
future use. Switch SWF uses the first four positions,
with Positions 5 through 8 reserved for future use.
The settings and functions of the first four positions
of SWF are given in Table 2. Check the chart, and
then use a pointed object, such as a small
screwdriver, to set the bank.
Option Switch Position Settings
12345678
Baud Rate
110 ON ON ON
300 OFF ON ON
600 ON OFF ON
1200 OFF OFF ON
2400 ON ON OFF
4800 OFF ON OFF
9600 ON OFF OFF
19,200 OFF OFF OFF
Parity
No Parity ON ON
Even Parity OFF ON
Odd Parity ON OFF
No Parity OFF OFF
Data Bits/Word
7OFF
8ON
Flow Control
Hardware (DTR/CTS) ON
Software (X-ON/X-OFF) OFF
Break Detection
Break to Disconnect ON
Ignore Breaks OFF
Table 1. Switch Port Options (Individual Port Switch Banks)

9
CHAPTER 3: Installation
Lead Pass-Through
This function allows the COS II either to pass
hardware-handshake leads to connected devices or
to block them. If they are blocked, the leads will still
be used to regulate the internal buffer of the
Switch. The following table shows the behavior of
the COS II for different combinations of devices.
Table 2. Leads Passed Through.
Table 3. Settings and Functions for Switch SWF
NOTE
To use the saving function of the
SW540A-R3, DIP switch F position 1
must be OFF.
Switch Switch
Position Setting Function
1 ON Reverts to attention string of
@ and switches to factory
defaults when reset or re-
powered.
OFF Maintains user-set attention
upon reset.
2 ON Limits port name changes and
attention-character changes
to Port 0 only.
OFF All ports can change port
names and attention
characters.
3 ON Perform self-test (see
Section 5)
OFF Normal operation.
4 ON DCD (RTS) passed through.
OFF DCD (RTS) blocked.
5-8 Reserved for future use.
Port 1 Port 2 Leads Passed
DTE DTE Port 1 DCD to Port 2 RTS
Port 2 DCD to Port 1 RTS
DTE DCE Port 1 DCD to Port 2 DCD
Port 2 RTS to Port 1 RTS
DCE DTE Port 1 RTS to Port 2 RTS
Port 2 RTS to Port 1 DCD
DCE DCE Port 1 RTS to Port 2 DCD
Port 2 RTS to Port 1 DCD
3.2 Configuring Shunt Jumpers for DTE or DCE
Each of the five (or nine) ports has a bank of shunt
jumpers located next to its port connector on the
rear of the internal board or boards. (See Fig. 1 for
their location.) These jumpers allow each port to be
configured as either Data Terminal Equipment
(DTE) or Data Communications Equipment
(DCE). You don’t need a crossover cable to connect
your equipment to the Code Operated Matrix
Switch—just standard straight-through cabling.
Shunt jumpers are fragile. When removing them,
use a small flathead screwdriver or IC remover. With
a screwdriver, use a gentle motion, prying from one
end of the shunt. When installing, press down
gently only after you have made sure all pins are
above holes.
Table 3. Input and Output Signals
Table 4. DIP Shunt Settings
NOTE: If you use a cross-pinned cable, set the DIP
shunt setting to the opposite of the one
recommended above.
Connecting straight cable to: Set DIP Shunt to:
PC w/25-pin connector DCE
DEC™ computer DCE
Data General computer DCE
Most printers (ex: HP®
LaserJet®) DCE
DTE devices DCE
Modem DTE
HP minicomputer DTE
DCE devices DTE
Signal Pin Direction as DTE Direction as DCE
TXD 2 Output Input
RXD 3 Input Output
RTS 4 Output Input
CTS 5 Input Output
DSR 6 N/A Output
DCD 8 Input Output
DTR 20 Output Input
RI 22 Input N/A

Code Operated Matrix Switch
10
3.3Connecting Devices to the Ports
After you configure the internal switches and
jumpers, connect the Code Operated Matrix Switch
to the input/output devices:
1. Replace the Switch’s cover.
2. Connect the input/output device cables to
Ports 0-4 (or 0-8 if you have the 4-Port
Expansion Board) of the COMS.
3. Plug the wall-mounted power supply into a
suitable outlet.
The Switch is now ready. Go on to Chapter 4 to
learn about the Switch’s controls and indicators.
You’ll control your switch mostly through ASCII
codes you send from the devices connected to it.
There are, however, mechanical controls and
indicators on the Code Operated Matrix Switch.
This chapter begins with the mechanical controls,
Sections 4.1 and 4.2, and then treats the character
codes in the sections that follow.

11
CHAPTER 4: Operation
4.1Front-Panel Indicators
There are a total of ten LEDs, located on the
Switch’s right front panel: nine port status LEDs
and one power LED.
Power LED: This indicator lights when the power
is on.
Port Status LEDs: The nine status LEDs accom-
modate the 4-Port Expansion Board as well as the
standard 5-port Switch. A port’s LED flickers
momentarily, indicating activity, whenever that port
receives data. The LED will flash only if a link is es-
tablished and actual data (not commands) is being
received.
4.2 Reset Button
Figure 1 shows the location of the reset button.
Use this button to reset the Code Operated Matrix
Switch. Any time you change the internal switch
settings, press the reset button to activate the
changes. While the Code Operated Matrix Switch
is resetting, it does not process data.
Disconnecting power from the Code Operated
Matrix Switch also resets it.
A third way to reset the switch is to use the
Remote Reset command. See RR in Section 4.3.2.
4.3 ASCII Control Codes
The Code Operated Matrix Switch accepts com-
mands from any port. (No one port is designated
as a master port.) A single command consists of the
attention string, followed by a command sequence
that may be from one to three characters long. The
Help screen, shown in Fig. 2., presents all the
command sequences for the Switch.
4.3.1 THE ATTENTION STRING
The ATTENTION string is a character string,
0 to 8 characters in length, that must precede all
commands. Enter the character string via the SET
ATTENTION command. The factory default is the
character @. To change the attention string, see the
A(Set Attention String) command in the next section.
4.3.2 THE COMMANDS
?—Help
When the Code Operated Matrix Switch receives an
ATTENTION string followed by a ?(question mark),
it sends the HELP screen out to the port that issued the
command. See Fig. 2 on the next page.
Q—Query
When the Code Operated Matrix Switch receives
an ATTENTION string followed by a Q, it sends
the STATUS screen out to the port that issued
the command. (See Fig. 3.)
4. Operation

Code Operated Matrix Switch
12
The STATUS screen shows PORT NAMES, which
ports are LINKED to other ports, which links are
TRANSPARENT, (a transparent link does not honor
the Attention command), ACTIVITY (the presence
of buffered characters), and the ATTENTION
strings for each port.
L — Link
When the Code Operated Matrix Switch receives an
ATTENTION string followed by an Land two PORT
NUMBERS, it attempts to set up a bi-directional link
between these two ports. If either of these ports is
already linked, the Code Operated Matrix Switch
sends a message to the port that issued the
command, indicating that the link was not made.
Otherwise, the two ports link and the Code Operated
Matrix Switch sends a message to the port that issued
the command, indicating that it made the link.
NOTE: Any port can issue the Link command, even
if that port is not one of the two ports being
linked. For example, Port 1 could issue a
command to link Port 2 and Port 5.
U — Unlink
When the Code Operated Matrix Switch receives an
ATTENTlON string followed by a Uand two PORT
NUMBERS, it attempts to break a bi-directional link
between these two ports (“unlink”). If these two
ports are not linked to each other, the Code
Operated Matrix Switch sends a message to the port
that issued the command, indicating that the unlink
was not made. Otherwise, the two ports will be
unlinked and the Code Operated Matrix Switch
sends a message to the port that issued the
command, indicating that the unlink was successful.
HELP SCREEN
COMMAND NAME DESCRIPTION
Attention Character must precede all commands
L<x><y> LINK Make regular link from port <x> to port <y>
U<x><y> UNLINK Remove regular or transparent link port <x> to port
<y>
DA DISCONNECT ALL Disconnects all regular and transparent links
T<x><y> TRANSPARENT LINK Make transparent link from port <x> to port <y>
B<x> SEND BREAK Send break out port <x>
A<x><z> SET ATTENTION Set port <x> attention to <z> (up to 8 characters,
CR)
N<x><z> SET PORT NAME Set port <x> name to <z> (up to 8 chars, CR)
Q QUERY Query box for status
S SAVE Save Connection Matrix
RL RELOAD Reload factory default settings
RR REMOTE RESET Return unit to power up configuration
? HELP Displays help screen
<BREAK> BREAK CONDITION Remove a regular or transparent link
Fig. 2. The Help Screen
Port Name Linked To Transparent Activity Attention String
0 ....... N N @
1 ....... N N @
2 ....... N N @
3 ....... N N @
4 ....... N N @
5 ....... N N @
6 ....... N N @
7 ....... N N @
8 ....... N N @
Fig. 3. The Status Screen

13
CHAPTER 4: Operation
NOTE: Any port can issue the Unlink command,
even if that port is not one of the two ports
that will be unlinked. For example, Port 5
could command Port 2 and Port 3 to unlink.
DA — Disconnect All
When the Code Operated Matrix Switch receives an
ATTENTION string followed by DA, it will break
every link currently defined. The buffers are
purged, and any data in them is lost.
T — Transparent Link
A TRANSPARENT LINK is similar to a REGULAR
LINK, with only this exception: When a port is
transparently linked, the Switch will no longer
honor an ATTENTION string from that port. The
ATTENTION string is treated as data, to allow all
data to pass between two ports. If you want to break
a Transparent Link, you must enable break
detection (see Section 4.4), then send a break to
the switch from either of the devices attached to the
transparently linked ports (see B—Send Break). You
can also send the U—Unlink command from one of
the unattached ports.
When the Code Operated Matrix Switch receives
an ATTENTION string followed by a Tand two
PORT NUMBERS, it attempts to set up a bi-
directional TRANSPARENT link between these two
ports. If either of these ports is already linked, the
Code Operated Matrix Switch sends a message to
the port that issued the command, indicating that
the link was not made. Otherwise, the two ports link
and the Code Operated Matrix Switch sends a
message to the port that issued the command
indicating that the link was successful.
NOTE: Any port can issue the Transparent Link
command, even if that port is not one of the
two ports being transparently linked. For
example, Port 1 could issue a command to
transparently link Port 2 to Port 5.
B — Send Break
The Switch uses a break condition to unlink a pair
of ports. When it receives an ATTENTION string
followed by a Band a PORT NUMBER, it sends a
250-millisecond break condition out the indicated
port. Then it sends a message to the port that issued
the command, indicating that the break was sent.
NOTE: Any port can issue the Send Break
command. For example, Port 3 could issue a
command to send a break out Port 4.
A — Set Attention
When the Code Operated Matrix Switch receives an
ATTENTION string followed by an Aand a Port
number, it echoes the Aand the port number to
the indicated port. The Code Operated Matrix
Switch then waits for a 0- to 8-character
ATTENTION string followed by Return. If control
characters are entered, they will appear on the
screen as ^<letter>, where <letter> is the key you
pressed while holding down the control key. If a
zero-length ATTENTION string is entered for a
port, you will no longer be able to send commands
from that port.
NOTE: Any port can issue the Set Attention
command. For example, Port 5 could issue a
command to set the attention string for
Port 6. If you need more security, you can
designate Port 0 as the only port capable of
changing an attention string, by setting
Switch F’s Position 2 to ON.
N — Set Port Name
When the Code Operated Matrix Switch receives an
ATTENTION string followed by an Nand a PORT
NUMBER, it echoes the Nand the PORT NUMBER
to the indicated port. The Code Operated Matrix
Switch then waits for a 1 to 8 character PORT
NAME followed by Return.
NOTE: Any port can issue the Set Port Name
command. For example, Port 7 could issue a
command to set the port name for Port 8.
You can designate Port 0 as the only port
capable of changing a Port Name, by setting
Switch F’s Position 2 to ON.
S — Save
When the Code Operated Matrix Switch receives an
ATTENTION string followed by an S, it will save the
current connection matrix in nonvolatile memory.
This will preserve any combination of regular and
transparent links. After this Save operation is
completed, the links you saved will be restored any
time the Switch is reset.

Code Operated Matrix Switch
14
RL — Reload
When the Code Operated Matrix Switch receives an
ATTENTION string followed by RL, it returns to its
factory-default settings. All port names are replaced
with spaces, and all attention strings revert to the
default @. Any data that may be in the buffers is
purged.
RR — Remote Reset
When the Code Operated Matrix Switch receives an
ATTENTION string followed by RR, it resets itself,
as though you had pushed the reset button or
turned the power off and back on. Any links you’ve
saved with the Save command will be restored.
4.4 Break Detection
When the Code Operated Matrix Switch detects an
incoming break condition, it will either act on it or
ignore it, depending on how DIP Switch Position 8
is set on each port. If Position 8 is ON, then when
any port on the Code Operated Matrix Switch is
linked to another port and receives a break
condition, the two ports will be unlinked. The Code
Operated Matrix Switch sends a message to the port
that requested the break condition, to indicate that
the unlink was successful. Otherwise, the Code
Operated Matrix Switch sends a message to the
requesting port to indicate that the unlink was
unsuccessful, since that port was not linked initially.
Sometimes cable noise can be perceived as a
break, so unless you want a break to be a port’s
normal method of disconnection, you should
configure that port to ignore breaks. Set DIP
Switch Position 8 to ON.

15
CHAPTER 5: Troubleshooting
5.1 Self-Tests
The Code Operated Matrix Switch has a number of
self-tests to ensure that its circuitry is fully
operational. These tests check the RAM, LEDs, DIP
Switches, and Serial Ports. An Interrupt Test can
also be performed.
• The RAM Test checks the internal memory of
the Switch by writing an internal test pattern,
and then reads it for accuracy. This test checks
the integrity of the RAM.
• The LED Test checks the LEDs by turning them
all OFF, then ON one at a time, then all ON,
then OFF one at a time. This test tells you
whether the LEDs are working normally or
whether any are shorted. The test runs
continuously until you press any key to exit.
• The DIP Switch Test reads the DIP switches and
displays their settings on the screen. This test
tells you whether the DIP switches and
associated circuitry are operating normally and
are set up the way you want them. The settings
will be displayed on the screen continuously un-
til you press any key. Then the test checks
whether an Expansion Board is installed. (If an
Expansion Board is not installed, readings will
be displayed but can be disregarded.)
• The Serial Port Test is a simple loopback test
that checks whether data is being correctly
transmitted and received on any particular port.
This test also checks, using DTR/CTS/RI or
RTS/DCD, whether the box can loop control
leads back properly.
• The Interrupt Test checks the interrupt circuitry
of the Switch. During this test, the letter Awill
appear on the screen. A message will indicate
whether the test passed or failed.
NOTE: To perform a data test, jumper Pins 2 and 3
together on the port you want to test. To test
DTR/CTS/RI, jumper Pins 20, 5, and 22
together. To test RTS/DCD, jumper Pins 4
and 8 together.
To run a self-test, follow these steps:
1. Using the shunt, configure Port 0 as DCE.
2. Set the terminal to 9600 baud, 1 stop bit, no
parity.
3. Connect the terminal to Port 0, using only Pins
2, 3, and 7.
4. Set DIP Switch 3 on Switch F to the ON position
(the switch is OFF for normal operation).
5. Power the switch on.
6. When a self-test is run, this message will appear:
Type in your reply: capital Ror capital O.
If you select R, the tests you select from the next
menu will repeat until you press the BREAK key.
Owill run tests only once.
After you’ve picked Ror O, this menu appears:
If you select A, you get the following tests:
5. Troubleshooting
**CODE OPERATED MATRIX SWITCH SELF TEST V 1.0**
RUN TESTS (R)EPEATEDLY OR (O)NCE?
WHICH TESTS SHOULD BE RUN?
(R)AM TEST
(L)ED TEST
(D)IP SWITCH TEST
(S)ERIAL PORT TEST
(I)NTERRUPT TEST
(A)LL TESTS

Code Operated Matrix Switch
16
The tests are performed at 9600 bps, no parity, and
1 stop bit. The serial-port test will return a “*” for
every section that passes the test, and a “FAILED”
message otherwise. To perform a proper serial-port
test, you must tie together Pins 2 and 3 for the data
portion, Pins 20, 5, and 22 for the DTR/CTS/RI
portion, and Pins 4 and 8 for the RTS/DCD portion
for each port you wish to test.
DIP SWITCH TEST (MAIN BOARD) HIT ANY KEY TO GO
TO NEXT TEST
SWITCHES ARE DISPLAYED IN BINARY (0 = OFF, 1 =
ON)
SWG SWF SWE SWD SWC SWB SWA
00000010 00100000 10000101 10000101
10000101 10000100 10000100
EXPANSION BOARD IS INSTALLED
DIP SWITCH TEST (EXPANSION BOARD) HIT ANY KEY
TO GO TO NEXT TEST
SWITCHES ARE DISPLAYED IN BINARY (0 = OFF, 1 =
ON)
SWK SWJ SWI SWH
11111101 11101101 11110101 11100101
SERIAL PORT TEST (EXPANSION BOARD IS
INSTALLED)
PORT# DATA DTR/CTS/RI RTS/DCD
PORT 0 * FAILED FAILED
PORT 1 FAILED FAILED FAILED
PORT 2 FAILED FAILED FAILED
PORT 3 FAILED FAILED FAILED
PORT 4 FAILED FAILED FAILED
PORT 5 FAILED FAILED FAILED
PORT 6 FAILED FAILED FAILED
PORT 7 FAILED FAILED FAILED
PORT 8 FAILED FAILED FAILED
SERIAL PORT TEST FAILED
INTERRUPT TEST IN PROGRESS
A
INTERRUPT TEST PASSED
RAM TEST 64K RAM IS GOOD
LED TEST IN PROGRESS, ALL LEDS SHOULD TURN ON
AND OFF. PRESS ANY KEY TO EXIT
5.2 Sample Test Program
Here is a sample test program written in BASIC for the Code Operated Matrix Switch. When run, this
program will output a test message on each port. To run this program, connect the PC to Port 0. REM
statements (“Remarks”) are optional, and the attention character is the default @.
100REM**CODE OPERATED MATRIX SWITCH TEST**
110OPEN "COM1:9600,N,8,1,CS,DS"AS1 :REM** SET UP COM 1 PC PORT**
120P=49 :REM** SET PORT # TO 1 (DECIMAL 49)**
130PRINT #1,CHR$(64); :REM** SEND ATTENTION CHAR (@) **
140PRINT #1,"L0"; :REM** SEND LINK COMMAND**
150PRINT #1,CHR$(P) :REM** SEND PORT # OUT COM 1**
160T=P-48 :REM** CONVERT DEC. TO ACTUAL PORT #**
170PRINT #1,"THIS IS A TEST OF PORT #"T :REM** SENDS MESSAGE OUT COM 1**
180FOR I=1 TO 250 :REM** DELAY**
190NEXT I :REM** LOOP**
200PRINT #1,CHR$(64); :REM** SEND ATTENTION CHAR (@)**
210PRINT #1,"U0"; :REM** SEND UNLINK COMMAND**
220PRINT #1,CHR$(P) :REM** SEND PORT # OUT COM 1**
230P=P+1 :REM** INCREMENT PORT #**
240FOR I=1 TO 250 :REM** DELAY**
250NEXT I :REM** LOOP**
260IF P=57 THEN GOTO 120 ELSE GOTO 130 :REM** LOOPBACK FOR NEXT PORT**

17
APPENDIX A: ASCII Codes
Appendix A: ASCII Codes
UPPER CASE
OCTAL HEX DECIMAL
100 40 64 @
101 41 65 A
102 42 66 B
103 43 67 C
104 44 68 D
105 45 69 E
106 46 70 F
107 47 71 G
110 48 72 H
111 49 73 I
112 4A 74 J
113 4B 75 K
114 4C 76 L
115 4D 77 M
116 4E 78 N
117 4F 79 O
120 50 80 P
121 51 81 Q
122 52 82 R
123 53 83 S
124 54 84 T
125 55 85 U
126 56 86 V
127 57 87 W
130 58 88 X
131 59 89 Y
132 5A 90 Z
133 5B 91 [
134 5C 92 \
135 5D 93 ]
136 5E 94 ^
137 5F 95 -
CONTROL CHARACTERS
OCTAL HEX DECIMAL
0 0 0 NUL
1 1 1 SOH
2 2 2 STX
3 3 3 ETX
4 4 4 EOT
5 5 5 ENQ
6 6 6 ACK
7 7 7 BEL
10 8 8 BS
11 9 9 HT
12 A 10 LF
13 B 11 VT
14 C 12 FF
15 D 13 CR
16 E 14 SO
17 F 15 SI
20 10 16 DLE
21 11 17 DC1
22 12 18 DC2
23 13 19 DC3
24 14 20 DC4
25 15 21 NAK
26 16 22 SYN
27 17 23 ETB
30 18 24 CAN
31 19 25 EM
32 1A 26 SUB
33 1B 27 ESC
34 1C 28 FS
35 1D 29 GS
36 1E 30 RS
37 1F 31 US
LOWER CASE
OCTAL HEX DECIMAL
140 60 96 `
141 61 97 a
142 62 98 b
143 63 99 c
144 64 100 d
145 65 101 e
146 66 102 f
147 67 103 g
150 68 104 h
151 69 105 i
152 6A 106 j
153 6B 107 k
154 6C 108 l
155 6D 109 m
156 6E 110 n
157 6F 111 o
160 70 112 p
161 71 113 q
162 72 114 r
163 73 115 s
164 74 116 t
165 75 117 u
166 76 118 v
167 77 119 w
170 78 120 x
171 79 121 y
172 7A 122 z
173 7B 123 {
174 7C 124 |
175 7D 125 }
176 7E 126 ~
177 7F 127 del
NUMBERS AND SYMBOLS
OCTAL HEX DECIMAL
40 20 32 SP
41 21 33 !
42 22 34 "
43 23 35 #
44 24 36 $
45 25 37 %
46 26 38 &
47 27 39 '
50 28 40 (
51 29 41 )
52 2A 42 *
53 2B 43 +
54 2C 44 ,
55 2D 45 -
56 2E 46 .
57 2F 47 /
60 30 48 0
61 31 49 1
62 32 50 2
63 33 51 3
64 34 52 4
65 35 53 5
66 36 54 6
67 37 55 7
70 38 56 8
71 39 57 9
72 3A 58 :
73 3B 59 ;
74 3C 60 <
75 3D 61 =
76 3E 62 >
77 3F 63 ?

Code Operated Matrix Switch
18
Before you begin, follow standard procedures for
grounding any accumulated static electricity, to
prevent damage to the circuits of the main and
expansion boards. Also, shut off the Switch’s power
by unplugging the wall-mounted transformer.
1. Remove the cover of the Switch.
2. Make sure you have set Ports 0 through 5
properly for DTE or DCE operation. Refer
to Section 3.2 of the manual for details.
3. Install the standoffs in the two holes that run
along the midline of the main board.
4. Insert the Expansion Board’s row of RS-232
connectors into the row of holes at the rear of the
Switch. Make sure the connector that projects
from the bottom of the Expansion Board is seated
firmly in the socket of the main board.
5. Screw the 8 screwlocks into the holes along the
row of expansion ports. Also set screws into the
standoffs.
6. Set the baud rate, parity, word size, flow
control, and break-detection capacity with DIP
Switch Banks SWH through SWK. Use the chart
on the next page.
7. Set each expansion port for DTE or DCE
operation with the DIP shunts. For precautions
and more information on shunts, see Section
3.2 (page 8).
8. Replace the cover of the Switch.
9. Connect your additional devices to the Switch.
10. Plug the wall-mounted transformer into its
AC socket.
Appendix B: Installing the
4-Port Expansion Card
(BACK)
(FRONT)
INDIVIDUAL PORT SWITCHES
(PORTS 5 THRU 8)
PORT 8 PORT 7 PORT 6 PORT 5
SWK
OFF
SWJ
OFF
SWI
OFF
SWH
OFF
PORT 5
DTE
DCE
PORT 6
DTE
DCE
PORT 7
DTE
DCE
PORT 8
DTE
DCE
The 4-Port Expansion Board

19
APPENDIX C: Quick Setup Guide
(BACK)
PORT 4 PORT 3 PORT 2 PORT 1 PORT 0
DTE
DCE
J7
U23 U20
J1
W1
VR1
RESET BUTTON
S1
R1
SW
G
SW
F
SW
E
SW
D
SW
C
SW
B
SW
A
SYSTEM SWITCHES
(SWF & SWG)
INDIVIDUAL PORT SWITCHES
STATUS INDICATORS
CH0CH1 CH2CH3 CH4CH5CH6 CH7CH8 PWR
(FRONT)
DTE
DCE
DTE
DCE
DTE
DCE
DTE
DCE
OFF OFF OFF OFF OFF OFF OFF
PORT 4 PORT 3 PORT 2 PORT 1 PORT 0
Switch Switch
Position Setting Function
1 ON Reverts to factory-set attention
string of @ when reset
OFF Maintains user-set attention string
when reset
2 ON Limits port name changes and
attention-character changes to
Port 0 only
OFF All ports can change port names
and attention characters
3 ON Perform self-test (see Section 5)
OFF Normal operation
4 ON DCD (RTS) passed through
OFF DCD (RTS) blocked
5-8 Reserved for future use
Functions and Settings, Switch Bank SWF
Appendix C: Quick Setup Guide
Individual Port Switch Banks
Internal Board Locations
Option Switch Position Settings
12345678
Baud Rate
110 ON ON ON
300 OFF ON ON
600 ON OFF ON
1200 OFF OFF ON
2400 ON ON OFF
4800 OFF ON OFF
9600 ON OFF OFF
19,200 OFF OFF OFF
Parity
No Parity ON ON
Even Parity OFF ON
Odd Parity ON OFF
No Parity OFF OFF
Data Bits/Word
7 OFF
8ON
Flow Control
Hardware (DTR/CTS) ON
Software (X-ON/X-OFF) OFF
Break Detection
Break to Disconnect ON
Ignore Breaks OFF