Black Box Switch SW980AE User Manual

MARCH 2000  
SW980AE  
SW981AE  
SW982AE  
SW980A  
SW981A  
SW982A  
Local/Remote Electronic Switches  
1
O
2 T  
/ REMOTE  
SW  
LOCAL  
ITCH  
R
®
B
BLACK BOX  
REMOTE  
724-746-5500  
A
B
A
R
PW  
CUSTOMER  
SUPPORT  
INFORMATION  
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 724-746-0746  
Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018  
 
LOCAL/REMOTE ELECTRONIC SWITCHES  
NORMAS OFICIALES MEXICANAS (NOM)  
ELECTRICAL SAFETY STATEMENT  
INSTRUCCIONES DE SEGURIDAD  
1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de  
que el aparato eléctrico sea operado.  
2. Las instrucciones de seguridad y operación deberán ser guardadas para  
referencia futura.  
3. Todas las advertencias en el aparato eléctrico y en sus instrucciones de  
operación deben ser respetadas.  
4. Todas las instrucciones de operación y uso deben ser seguidas.  
5. El aparato eléctrico no deberá ser usado cerca del agua—por ejemplo, cerca  
de la tina de baño, lavabo, sótano mojado o cerca de una alberca, etc.  
6. El aparato eléctrico debe ser usado únicamente con carritos o pedestales que  
sean recomendados por el fabricante.  
7. El aparato eléctrico debe ser montado a la pared o al techo sólo como sea  
recomendado por el fabricante.  
8. Servicio—El usuario no debe intentar dar servicio al equipo eléctrico más allá  
a lo descrito en las instrucciones de operación. Todo otro servicio deberá ser  
referido a personal de servicio calificado.  
9. El aparato eléctrico debe ser situado de tal manera que su posición no  
interfiera su uso. La colocación del aparato eléctrico sobre una cama, sofá,  
alfombra o superficie similar puede bloquea la ventilación, no se debe colocar  
en libreros o gabinetes que impidan el flujo de aire por los orificios de  
ventilación.  
10. El equipo eléctrico deber ser situado fuera del alcance de fuentes de calor  
como radiadores, registros de calor, estufas u otros aparatos (incluyendo  
amplificadores) que producen calor.  
11. El aparato eléctrico deberá ser connectado a una fuente de poder sólo del  
tipo descrito en el instructivo de operación, o como se indique en el aparato.  
2
 
NOM STATEMENT, TRADEMARKS  
12. Precaución debe ser tomada de tal manera que la tierra fisica y la polarización  
del equipo no sea eliminada.  
13. Los cables de la fuente de poder deben ser guiados de tal manera que no  
sean pisados ni pellizcados por objetos colocados sobre o contra ellos,  
poniendo particular atención a los contactos y receptáculos donde salen del  
aparato.  
14. El equipo eléctrico debe ser limpiado únicamente de acuerdo a las  
recomendaciones del fabricante.  
15. En caso de existir, una antena externa deberá ser localizada lejos de las lineas  
de energia.  
16. El cable de corriente deberá ser desconectado del cuando el equipo no sea  
usado por un largo periodo de tiempo.  
17. Cuidado debe ser tomado de tal manera que objectos liquidos no sean  
derramados sobre la cubierta u orificios de ventilación.  
18. Servicio por personal calificado deberá ser provisto cuando:  
A: El cable de poder o el contacto ha sido dañado; u  
B: Objectos han caído o líquido ha sido derramado dentro del aparato; o  
C: El aparato ha sido expuesto a la lluvia; o  
D: El aparato parece no operar normalmente o muestra un cambio en su  
desempeño; o  
E: El aparato ha sido tirado o su cubierta ha sido dañada.  
TRADEMARKS USED IN THIS MANUAL  
Any trademarks used in this manual are acknowledged to be the property of the trademark  
owners.  
3
 
LOCAL/REMOTE ELECTRONIC SWITCHES  
Contents  
Chapter  
Page  
1. Specifications ............................................................................................. 5  
2. Introduction ............................................................................................... 7  
3. Installation and Configuration ................................................................. 8  
3.1 Before You Install ................................................................................ 8  
3.2 The Setup Procedure .......................................................................... 9  
4. Operation ................................................................................................. 17  
4.1 Local Switching ................................................................................. 17  
4.1.1 ABC and ABCDE Switches (SW980 and SW982 Units) ........ 17  
4.1.2 X Switches (SW981 Units) ...................................................... 18  
4.2 Remote Switching ............................................................................. 19  
4.2.1 ABC and ABCDE Switches (SW980 and SW982 Units) ........ 19  
4.2.2 X Switches (SW981 Units) ...................................................... 19  
4.3 Test Results ........................................................................................ 22  
5. Troubleshooting ...................................................................................... 23  
5.1 Calling Black Box .............................................................................. 23  
5.2 Shipping and Packaging ................................................................... 23  
4
 
CHAPTER 1: Specifications  
1. Specifications  
Compliance —  
Data Rate —  
FCC Part 15 Subpart J Class A, IC Class/classe A  
Up to 256 kbps typical; higher speeds possible with  
careful consideration of cabling and equipment  
requirements  
User Controls —  
All models: Remote switching either through TTL,  
RS-232, RS-422/485, or other active drivers or  
through dry-contact closure;  
SW980 and SW982 models: (1) Rear-mounted  
2-position DIP switch for grounding;  
SW981 models: (2) Rear-mounted 2-position DIP  
switches for grounding  
Indicators —  
Front-mounted LEDs:  
All models: (1) for Power;  
SW980 models: (2) for Active Port;  
SW981 models: (1) for Straight, (1) for Crossed;  
SW982 models: (4) for Active Port  
Connectors —  
All models: (1) Rear-mounted RJ-45 female,  
(1) Internal 4-position terminal block;  
SW980 models: (3) Rear-mounted DB25 female;  
SW981 models: (4) Rear-mounted DB25 female;  
SW982 models: (5) Rear-mounted DB25 female  
Leads Supported — DB25: All  
Signal Levels —  
Between 15 VDC maximum for all leads  
“On” Resistance  
Through Switch —  
SW980 and SW981 models: 35 ohms maximum,  
22 ohms typical;  
SW982 models: 100 ohms maximum, 40 ohms typical  
Port-to-Port  
Switching Speed  
Using Remote  
Inputs —  
Less than 1 µs  
5
 
LOCAL/REMOTE ELECTRONIC SWITCHES  
Remote Input  
Logic Levels —  
VIH greater than 2.5 volts, maximum +15 volts;  
VIL less than 0.5 volts, minimum –15 volts  
NOTE  
For dry-contact operation, the total external-  
connection DC resistance must be less than  
240 ohms when the dry contact is closed for the  
Local/Remote Electronic Switch to correctly  
read this condition as a “low” input.  
Power —  
SW980A, SW981A, SW982A:  
From wallmount power supply PS154:  
Input: 120 VAC, 60 Hz;  
Output: 17 VAC CT;  
SW980AE, SW981AE, SW982AE:  
From wallmount power supply PS154E:  
Input: 230 VAC, 50 Hz;  
Output: 17 VAC CT;  
Consumption: 1 watt  
MTBF —  
65,000 hours  
Operating  
Temperature —  
32 to 140˚F (0 to 60˚C)  
Storage  
Temperature —  
–4 to +158˚F (–20 to +70˚C)  
Up to 95% noncondensing  
High-impact plastic  
Humidity —  
Enclosure —  
Size —  
SW980 and SW981 models: 2.5"H x 6"W x 6.3"D  
(6.4 x 15.2 x 16 cm);  
SW982 models: 3.5"H x 6"W x 6.3"D  
(8.9 x 15.2 x 16 cm)  
Weight —  
1.5 lb. (0.7 kg)  
6
 
CHAPTER 2: Introduction  
2. Introduction  
Switching between data lines manually can often damage the connected  
equipment, because this relatively slow and imprecise action can cause data-line  
surges and spikes large enough to damage today’s sensitive circuitry. With the  
Local/Remote Electronic Switches, you can eliminate this potential hazard. Their  
electronic switching action provides surgeless, spikeless changeovers—something  
a mechanical switch just can’t do.  
In addition, these switches can be controlled remotely, from a convenient  
out-of-sight location.  
The stock models available are:  
SW980A  
SW980AE 230-VAC 2-to-1 Switch  
SW981A 115-VAC “X” (2-to-2) Switch  
SW981AE 230-VAC “X” (2-to-2) Switch  
SW982A 115-VAC 4-to-1 Switch  
115-VAC 2-to-1 Switch  
SW982AE 230-VAC 4-to-1 Switch  
These Switches can also be cascaded to allow a larger number of ports  
to be switched.  
7
 
LOCAL/REMOTE ELECTRONIC SWITCHES  
3. Installation and Configuration  
3.1 Before You Install  
Check the box and its contents before you begin installing your Local/Remote  
Electronic Switch. You should have received one Switch unit, one AC power supply,  
and one copy of this manual. If you didn’t receive all of these items, or if they have  
sustained damage that does not seem to be shipping-related, notify Black Box right  
away. If they have sustained impact or water damage that seems to have happened  
during shipping, notify both Black Box and the shipping carrier immediately.  
Unpack the box carefully. We recommend that you save the original container  
and its packing materials in case you need to ship the Switch later.  
You’ll need to install the Switch within 6 feet (1.8 m) of an AC outlet. Also,  
keep the Switch away from water and extreme temperatures.  
Make sure you have the proper cables or adapters. Whatever interface you want  
to switch (RS-232, RS-422, RS-485, V.35, TTL, etc.), you must use either cables with  
DB25 male connectors or adapters that convert the interface from your cables’  
connectors to DB25 male connectors. To perform remote switching, you must use  
an appropriate length of cable that has at least four wires. If you intend to connect  
it to the Switch’s internal terminal block, this cable must be unterminated at the  
Switch end. If you intend to connect it to the Switch’s “REMOTE” connector, this  
cable must have wires pinned to Pins 3 through 6 of a male RJ-45 connector at the  
Switch end. (If you must use existing cables that do not meet these requirements,  
call Black Box Technical Support; we might be able to provide adapters or create  
a special product for you.)  
8
 
CHAPTER 3: Installation and Configuration  
3.2 The Setup Procedure  
Installing and configuring a Local/Remote Electronic Switch is relatively quick and  
easy, and will vary only slightly depending on which model you’ve chosen. Follow  
these steps:  
(Steps 1 through 4 are for remotely switched applications only:)  
1. Make sure that the Switch is unplugged (is not receiving AC power). Open  
the Switch by unscrewing the two screws on the bottom of the unit (save these  
screws) and removing the top of the unit’s housing. (You will probably have  
to peel back the CE sticker on the bottom of the unit to get at one of the  
screws.)  
2. Find jumper W1 (for SW980 or SW981 units) or jumpers W2 and W3 (for  
SW982 units) on the Switch’s circuit board. Refer to Figure 3-1 on the next  
page if your unit is an SW980 model, to Figure 3-2 on page 11 if your unit is  
an SW981 model, or to Figure 3-3 on page 12 if your unit is an SW982 model.  
Set the jumper(s) as appropriate for your application:  
• Set W1, or W2 and W3, to the A-B position for applications that use  
dry-contact closure to perform remote switching.  
• Set W1, or W2 and W3, to the B-C position for applications that use  
active driver(s) to perform remote switching.  
(text continued on page 13)  
9
 
LOCAL/REMOTE ELECTRONIC SWITCHES  
W1  
A
B
C
TB1  
REAR  
FRONT  
Figure 3-1. PCB layout of the SW980 models.  
10  
 
CHAPTER 3: Installation and Configuration  
TB1  
A
B
C
W1  
REAR  
FRONT  
Figure 3-2. PCB layout of the SW981 models.  
11  
 
LOCAL/REMOTE ELECTRONIC SWITCHES  
W2  
TB1  
A
B
C
W3  
A
B
C
FRONT  
REAR  
Figure 3-3. PCB layout of the SW982 models.  
12  
 
CHAPTER 3: Installation and Configuration  
(text continued from page 9)  
3. If you will be performing remote switching using a cable that is unterminated  
at the Switch end, attach the cable’s wires to the appropriate positions of the  
4-position terminal block labeled “TB1” (refer to Figures 3-1 through 3-3 on  
pages 10 through 12 and to Tables 4-1 and 4-2 on pages 20 and 21). Connect  
the ground of the remote driver, or one side of the dry contact, to (either of)  
the terminal block’s ground pin(s). Connect the remote driver’s output(s),  
or the other side of the dry contact, to the terminal block’s input pin(s).  
4. Close the Switch’s housing and screw the two screws you removed in step 1  
back in. If you are using a remote-switching cable that is unterminated at the  
Switch end, make sure that the cable is seated in the slot on the left side of  
the Switch’s rear panel before you put the cover back on.  
(The installation procedure for locally switched applications begins with Step 5:)  
5. Find DIP switch S2 (for SW980 and SW982 units) or DIP switches S2 and S3  
(for SW981 units) on the Switch’s rear panel. Refer to Figure 3-4 below or  
Figure 3-5 or 3-6 on the next page, which show the rear panels of the SW980,  
SW981, and SW982 models respectively.  
B
A
SERIAL  
PARALLEL  
C
REMOTE  
Figure 3-4. Rear panel of the SW980 models.  
13  
 
LOCAL/REMOTE ELECTRONIC SWITCHES  
B
A
BB  
AA  
SERIAL  
PARALLEL  
REMOTE  
Figure 3-5. Rear panel of the SW981 models.  
B
A
D
SERIAL  
PARALLEL  
REMOTE  
C
E
Figure 3-6. Rear panel of the SW982 models.  
14  
 
CHAPTER 3: Installation and Configuration  
6. Set the DIP switch(es) as appropriate for your application. Refer to Table 3-1  
and Figure 3-7 below, and keep in mind that OFF = UP and ON = DOWN.  
Table 3-1. Possible Settings for Switches S2 and S3  
All 25 leads of the Local/Remote Electronic Switch’s DB25 connectors are straight-  
through and are isolated from one another. In RS-232 and DB25 parallel applications,  
we recommend that you use DIP switches S2 and S3 to make a “common” ground  
connection; this will help eliminate intermittent noise problems.  
Recommended Settings for RS-232 Applications:  
S2  
S3  
Model(s)  
SW980/982 units ON  
Pos. 1 Pos. 2 Pos. 1 Pos. 2 Connection(s) Made  
OFF  
N/A  
N/A  
Port C Pin 7 to  
Switch ground  
(down) (up)  
SW981 units  
ON  
ON  
OFF  
OFF  
(up)  
Ports AA and BB Pin 7  
to Switch ground  
(down) (down) (up)  
Recommended Settings for DB25 Parallel Applications:  
S2  
S3  
Model(s)  
SW980/982 units OFF ON  
Pos. 1 Pos. 2 Pos. 1 Pos. 2 Connection(s) Made  
N/A  
ON  
N/A  
Port C Pin 18 to  
Switch ground  
(up)  
(down)  
SW981 units  
OFF OFF  
ON  
Ports AA and BB Pin 18  
to Switch ground  
(up)  
(up)  
(down) (down)  
Recommended Settings for Other Applications:  
All models—Set all positions of switches S2 [and S3] to OFF (up).  
SERIAL  
PARALLEL  
(S3)  
(S2)  
ON 1  
2
ON 1  
2
(S2)  
ON 1  
2
SERIAL  
PARALLEL  
Figure 3-7. DIP switch S2 of the SW980 and SW982 models (left)  
and DIP switches S2 and S3 of the SW981 models (right).  
15  
 
LOCAL/REMOTE ELECTRONIC SWITCHES  
7. Put the Switch in the site you’ve selected.  
8. Shut off the equipment you plan to connect to the Switch.  
9A. SW980 and SW982 units only: Connect the cable from the “common” device  
(the one that’s going to access—or be shared by—the other devices) to the  
common connector (marked “C”) on the Switch’s rear panel. Connect the  
cables from the “branch” devices (those that will share—or be intermittently  
accessed by—the other device) to the branch connectors (marked “A” and  
“B” [and “D” and “E” on the SW982]) on the Switch’s rear panel.  
9B. SW981 units only: Connect the cables from the two “source” devices to the  
connectors on the Switch’s rear panel labeled “A” and “B.” Connect the  
cables from the “destination” devices to the connectors on the Switch’s  
rear panel labeled “AA” and “BB.”  
10. Remotely switched applications using terminated cable only: Plug the cable’s RJ-45  
plug into the connector marked “REMOTE” on the Switch’s rear panel. Make  
sure that the appropriate wires are attached to the appropriate pins in the  
RJ-45 plug (refer to Tables 4-1 and 4-2 on pages 20 and 21). The ground of  
the remote driver, or one side of the dry contact, must be connected to the  
connector’s ground pin. The remote driver’s output(s), or the other side of  
the dry contact, must be connected to the connector’s input pin(s).  
11. Plug the Switch’s power supply into an AC outlet.  
12. Turn on the attached equipment.  
Your Local/Remote Electronic Switch should now be ready for continuous  
operation, but test it to make sure it has been installed properly. See Chapter 4.  
16  
 
CHAPTER 4: Operation  
4. Operation  
4.1 Local Switching  
4.1.1 ABC AND ABCDE SWITCHES (SW980 AND SW982 UNITS)  
Refer to Figure 4-1 below: Test your Local/Remote Electronic Switch system by  
having the common device send data to, or receive data from, branch devices “A”  
and “B” (and, for SW982 units, “D” and “E”), one after the other. Switch between  
branch devices by manually turning the knob on the Switch’s front panel.  
ABC SWITCH  
SWITCHED  
A
COMMON  
C
SWITCHED  
B
Connections made are AC and BC -“C” IS COMMON  
ABCDE SWITCH  
SWITCHED  
A
SWITCHED  
B
COMMON  
C
SWITCHED  
D
SWITCHED  
E
Connections made are AC, BC, DC, and EC-“C” is COMMON  
Figure 4-1. Switching in the SW980 (top) and SW982 (bottom) models.  
17  
 
LOCAL/REMOTE ELECTRONIC SWITCHES  
4.1.2 X SWITCHES (SW981 UNITS)  
Refer to Figure 4-2 below: Test your Local/Remote Electronic Switch system by  
having each source device (“A” and “B”) send data to each destination device  
(“AA” and “BB”), one after the other. Switch between data pathways by manually  
turning the knob on the Switch’s front panel.  
“X” SWITCH  
A
B
AA  
BB  
Connections made are A-AA & B-BB or A-BB & B-AA  
Figure 4-2. Switching in the SW981 models.  
18  
 
CHAPTER 4: Operation  
4.2 Remote Switching  
When you do remote switching, keep these things in mind:  
• The knob on the Switch’s front panel must be in the “REMOTE” position.  
• The Switch interprets any voltage more negative than approximately 1.4 volts  
as a “low” and any voltage more positive than approximately 1.4 volts as a  
“high” (see the “Remote Input Logic Levels” spec in Chapter 1 for maximum  
and minimum switching points).  
• In dry-contact applications, the Switch will read a “low” when the contact  
is closed and a “high” when the contact is open.  
• The maximum allowed voltage on the remote-input leads is 15 volts.  
4.2.1 ABC AND ABCDE SWITCHES (SW980 AND SW982 UNITS)  
To test the remote-switching capability of your Local/Remote Electronic Switch  
system, you must first turn the knob on the Switch’s front panel to “REMOTE.”  
Now have the common device send data to, or receive data from, branch devices  
“A” and “B” (and, for SW982 units, “D” and “E”), one after the other. Switch  
between branch devices by sending “high” and “low” electric signals to the Switch  
through its RJ-45 connector or its internal 4-position terminal block. See Tables 4-1  
and 4-2 on pages 20 and 21 for pinouts and signal levels; see Figure 4-1 on page 17  
for basic illustrations of how the Switches function.  
4.2.2 X SWITCHES (SW981 UNITS)  
To test the remote-switching capability of your Local/Remote Electronic Switch  
system, you must first turn the knob on the Switch’s front panel to “REMOTE.”  
Now have each source device (“A” and “B”) send data to each destination device  
(“AA” and “BB”), one after the other. Switch between data pathways by sending  
“high” and “low” electric signals to the Switch through its RJ-45 connector or its  
internal 4-position terminal block. See Table 4-1 on the next page for pinouts and  
signal levels; see Figure 4-2 on the previous page for a basic illustration of how the  
Switch functions.  
19  
 
LOCAL/REMOTE ELECTRONIC SWITCHES  
Table 4-1. Connector Pinouts and Signal Levels for  
Port Selection with the ABC Switch (SW980 Models) or  
Path Selection with the X Switch (SW981 Models)  
Pinout of the RJ-45 Connector  
1
2
3
4
5
6
7
8
N/C  
N/C  
N/C  
Remote input  
+5 VDC output  
Signal ground  
N/C  
N/C  
Pinout of the 4-Position Terminal Block  
1
2
3
4
Signal ground  
N/C  
Remote input  
Signal ground  
Signal Levels for Port Selection (SW980 Models)  
Port Selected  
Remote Input  
A
B
High  
Low  
Signal Levels for Path Selection (SW981 Models)  
Paths Selected  
Remote Input  
A to AA, B to BB (straight)  
B to AA, A to BB (crossed)  
High  
Low  
20  
 
CHAPTER 4: Operation  
Table 4-2. Connector Pinouts and Signal Levels for  
Port Selection with the ABCDE Switch (SW982 Models)  
Pinout of the RJ-45 Connector  
1
2
3
4
5
6
7
8
N/C  
Reserved for future use  
Remote input B  
Remote input A  
+5 VDC output  
Signal ground  
N/C  
N/C  
Pinout of the 4-Position Terminal Block  
1
2
3
4
Signal ground  
Remote input B  
Remote input A  
Reserved for future use  
Signal Levels for Port Selection  
Port Selected  
Remote Input A  
Remote Input B  
A
B
D
E
High  
Low  
High  
Low  
High  
High  
Low  
Low  
21  
 
LOCAL/REMOTE ELECTRONIC SWITCHES  
4.3 Test Results  
If data doesn’t seem to be getting through when a device on one side of the Switch  
is connected to a device on the other side of the Switch, make sure that:  
• Both devices are turned on and receiving power.  
• The Switch is receiving power (its “POWER” LED should be lit).  
• The Switch’s front-panel knob is set properly.  
• All cables are good and cable connections are secure.  
• Any software involved is configured and operating correctly.  
If your Switch is working properly, your system is ready to go. If the Switch fails  
the test, or if it should begin malfunctioning later, contact Black Box Technical  
Support (see Chapter 5).  
22  
 
CHAPTER 5: Troubleshooting  
5. Troubleshooting  
5.1 Calling Black Box  
If you determine that your Local/Remote Electronic Switch is malfunctioning,  
do not attempt to alter or repair the unit. It contains no user-serviceable parts. Call  
Black Box Technical Support at 724-746-5500.  
Before you do, make a record of the history of the problem. We will be able to  
provide more efficient and accurate assistance if you have a complete description,  
including:  
• the nature and duration of the problem;  
• when the problem occurs;  
• the components involved in the problem;  
• any particular application that, when used, appears to create the problem  
or make it worse; and  
• the results of any testing you’ve already done.  
5.2 Shipping and Packaging  
If you need to transport or ship your Local/Remote Electronic Switch:  
• Package it carefully. We recommend that you use the original container.  
• If you are returning the Switch, please include everything you received with it.  
If you are shipping the Switch for repair or return, contact Black Box to get a  
Return Authorization (RA) number.  
23  
 
NOTES  
 
© Copyright 2000. Black Box Corporation. All rights reserved.  
1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746  
 

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