Comm-Tec SW-81VA-2 User Manual

SW-81VA-2

8-In 1-Out VGA and Stereo-Audio Switcher

User Manual

(English)

COMM-TEC GmbH

Siemensstr. 14
D-73066 Uhingen

Tel.: [phone]
Fax: [phone]

www.comm-tec.de Version A0-June 2007 / DBA

Copyright by COMM-TEC

User Manual SW-81VA-2

COMM-TEC GMBH SIEMENSSTRASSE 14 TELEFON [phone] WWW.COMM-TEC.DE

D-73066 UHINGEN TELEFAX +49(0)7161/3000-333 [e-mail]

INDEX

1.0 Overview

2.0 Power Requirements

3.0 Settings

4.0 Attaching Inputs and Outputs and Power Up

5.0 Front Panel Control

6.0 Control by Dry Contacts and Tally Outputs

7.0 Autoswitching and RGB Mute Function

8.0 RS-232 Control and Commands

9.0 CASCADE Function and Settings

10.0 Technical Specifications

11.0 Warranty, Service and Returns Policy

Please read this manual carefully before installing the SW-81VA-2.

COMM-TEC shall not be liable under any circumstances for consequential or
incidental damages and injuries including, but not limited to, labor costs or loss of
profits arising in connection with the use of or inability to use COMM-TEC
products.

COMM-TEC reserves the right to modify or discontinue designs, specifications,
warranties, and policies without notice.

User Manual SW-81VA-2

COMM-TEC GMBH SIEMENSSTRASSE 14 TELEFON [phone] WWW.COMM-TEC.DE

D-73066 UHINGEN TELEFAX +49(0)7161/3000-333 [e-mail]

1.0 Overview

Thank you for buying this product.
Please check the contents of the packaging carefully:

- (1) SW-81VA-2 unit

- (1) User Manual

- (1) Power Cord 230V Schuko

- (1) IR Remote Control

- (1) Connector 25pin SubD male for remote input

The SW-81VA-2 is a switcher with eight (8) inputs and one (1) output suitable to
route Computer Video plus dedicated Stereo Audio signals (Audio-follows-Video).

It has a Autoswitching function which automatically switches the active source to
the output, but can be controlled manually by front panel, eight dry contacts,
Infrared Remote and RS-232, too. Further it has a Autosequencing and RGB Mute
function.

User Manual SW-81VA-2

COMM-TEC GMBH SIEMENSSTRASSE 14 TELEFON [phone] WWW.COMM-TEC.DE

D-73066 UHINGEN TELEFAX +49(0)7161/3000-333 [e-mail]

2.0 Power Requirements

The SW-81VA-2 must be connected to an electrical environment of 220 - 230 Volt /
50 Hz. The power connector is at the left side on the rear panel. Before applying
power to the unit make sure that the power source has the correct values.

Caution

Be aware of the risks of an electric shock.

Only qualified personnel should perform installations.

In some countries, the power plug must be adapted to local standards.
The wires are identified according to the following coding:

- Brown PHASE (Identified with the letter L, maybe red)

- Blue NEUTRAL (Identified with the letter N, maybe black)

- Yellow/Green GROUND (Identified with the letter E, maybe green)

Caution

For safety and signal integrity, use a grounded external power source and a

grounded power connector. Reliable earthing of rack mounted equipment

should be maintained.

If unit is installed in a 19 Inch rack consideration should be given to an
environment compatible with the manufacturer’s maximum rated ambient
temperature. Avoid placing high heat-producing equipment directly above or
below the SW-81VA-2.

The power connector contains the power switch and the fuse drawer for 5x20
fuses. If the fuse blows, replace it only with the same type and value
(T 0,5A/250V).

3.0 Settings

Accessible on the backside of the SW-81VA-2 are 6 DIP-Switches for customizing
the unit.
The DIP-Switches 1 to 5 allow the setting for the CASCADE function.

The 6th DIP-Switch enables or disables the reception from IR remote control.
In ON position IR signal reception is enabled (default factory setting).

Refer to chapter 9.0 for a closer description of these settings.

User Manual SW-81VA-2

COMM-TEC GMBH SIEMENSSTRASSE 14 TELEFON [phone] WWW.COMM-TEC.DE

D-73066 UHINGEN TELEFAX +49(0)7161/3000-333 [e-mail]

4.0 Attaching Inputs and Outputs and Power Up

a) Switch all units OFF while attaching the signal cables.

b) Connect the 8 computer video sources to the 15pin HD female connectors.

c) Connect the destination to the 15pin HD female connector.

Note:

For the video connections, use good quality 75 Ω coax cable.

The video outputs can drive a signal up to approx. 20 meter cable length.

For longer cable runs use a signal line driver.

d) Connect the stereo audio sources to the eight stereo RCA sockets L+R 1 - 8.

e) Connect the stereo audio output (unbalanced on RCA connectors and/or

balanced on the 5pin screw terminal) to a pair of active speakers, an
amplifier or any other Signal Management unit to process the audio signal.

f) Connect the unit to a power source as described in chapter 2.0 and set the

switch at the rear side to ON.
Check that the LED in the pushbutton 1 lights up. After the power-up source
#1 is automatically selected. The SW-81VA-2 switches always in the Audio­follows-Video mode.

5.0 Front Panel Control

The switcher SW-81VA-2 can be controlled by
the 8 pushbuttons on the front panel.

The lighting up of the LED indicates which
source is present on the output.

After the power-up source #1 is automatically
selected.

User Manual SW-81VA-2

COMM-TEC GMBH SIEMENSSTRASSE 14 TELEFON [phone] WWW.COMM-TEC.DE

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pin #22 Time

1 (open) 4 sec.

0 (GND) 10 sec.

6.0 Control by Dry Contacts and Tally outputs

External remote control is possible by
eight (8) dry contacts connected to the
female 25pin SubD REMOTE input.

The eight (8) tally signal outputs can
be used to drive LEDs, which are
contained e.g. in the pushbuttons.

7.0 Autosequencing, Autoswitching and RGB Mute Function

The SW-81VA-2 has three auxiliary functions which can be activated by three (3)
dry contacts connected to the female 25pin SubD REMOTE input.
The function is enabled when the relative pin is connected to GND (pin 7).

7.1 Autosequencing

The eight sources are routed alternately
with a period of 4 or 10 seconds.
The period is defined by pin #22 of the
25pin SubD REMOTE connector (see table).

If an input is selected by front panel, IR-Remote or RS-232 during Autosequence,
this input is switched to the output and the sequence restarts from this input.

pin Function pin Function

1 Tally 1 14 Input 1
2 Tally 2 15 Input 2
3 Tally 3 16 Input 3
4 Tally 4 17 Input 4
5 Tally 5 18 Input 5
6 Tally 6 19 Input 6
7 Tally 7 20 Input 7
8 Tally 8 21 Input 8

9--22Time
10 -- 23 Autoswitching
11 Autosequence 24 +5 VDC
12 RS-232 Rx 25 Ground
13 Mute

User Manual SW-81VA-2

COMM-TEC GMBH SIEMENSSTRASSE 14 TELEFON [phone] WWW.COMM-TEC.DE

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7.2 Autoswitching

The active source is routed. Priority is given to source with the lowest number (1, 2,

3, 4,....) if more than one source is activ.

If an input is selected by front panel, IR-Remote or RS-232 during Autoswitching,
this input is switched to the output and the Autoswitching function is interrupted.

7.3 RGB Mute

The output signal is switched off. This function is useful when the image should
not yet be visible on the display.

Note:

Autosequencing, Autoswitching and RGB Mute are mutually exclusive.

Order of priority: RGB Mute -> Autoswitching -> Autosequencing.

Note:

If the CASCADE function is enabled the three auxiliary functions

by dry contacts are disabled.

RGB Mute and Autoswitching can be activated by serial control (RS-232).

pin Function pin Function

1 Tally 1 14 Input 1
2 Tally 2 15 Input 2
3 Tally 3 16 Input 3
4 Tally 4 17 Input 4
5 Tally 5 18 Input 5
6 Tally 6 19 Input 6
7 Tally 7 20 Input 7
8 Tally 8 21 Input 8

9--22Time
10 -- 23 Autoswitching
11 Autosequence 24 +5 VDC
12 RS-232 Rx 25 Ground
13 Mute

User Manual SW-81VA-2

COMM-TEC GMBH SIEMENSSTRASSE 14 TELEFON [phone] WWW.COMM-TEC.DE

D-73066 UHINGEN TELEFAX +49(0)7161/3000-333 [e-mail]

8.0 RS-232 Control and Commands

All functions of the SW-81VA-2 can be controlled with external controllers like
computers or third party controllers (e.g. AMX, RTI). A serial controller is any device
that is connected to the standard RS-232 serial port (25pin SubD female) on the
rear panel and that can send and receive ASCII character format.

Fixed settings for serial communication with the SW-81VA-2 are:

Tx must be connected to pin # 12 of the 25pin
SubD female REMOTE connector.
Ground is pin # 25.

In the table the hex commands and their dedicated functions are listed in order to
control the SW-81VA-2 by RS-232 (Input 9 to 29 for CASCADE function).

Hex

Command

Function

Hex

Command

Function

Hex

Command

Function
31h Input 1 3Bh Input 11 45h Input 21
32h Input 2 3Ch Input 12 46h Input 22
33h Input 3 3Dh Input 13 47h Input 23
34h Input 4 3Eh Input 14 48h Input 24
35h Input 5 3Fh Input 15 49h Input 25
36h Input 6 40h Input 16 4Ah Input 26
37h Input 7 41h Input 17 4Bh Input 27
38h Input 8 42h Input 18 4Ch Input 28
39h Input 9 43h Input 19 4Dh Input 29

3Ah Input 10 44h Input 20

Baud Rate 9600

Data Bits 8

Stop bit 1

Parity None

Hex

Command

Function Note
52h Autosequence effective only for single unit
53h Autoswitching effective for single and cascaded unit(s)
54h Mute Video only effective for single and cascaded unit(s)
55h Mute Audio only effective for single and cascaded unit(s)
56h Mute Video + Audio effective for single and cascaded unit(s)

User Manual SW-81VA-2

COMM-TEC GMBH SIEMENSSTRASSE 14 TELEFON [phone] WWW.COMM-TEC.DE

D-73066 UHINGEN TELEFAX +49(0)7161/3000-333 [e-mail]

Note:

Autosequencing, Autoswitching and RGB Mute are disabled

if the command is :

- repeated,

- another command is sent or if a

- pushbutton on the front panel is pressed.

In the latter case the input will be routed relative to the pushbutton pressed.

9.0 CASCADE Function and Settings

Up to four SW-81VA-2 can be cascaded in series in order to achieve a
29-In 1-Out Switcher.

Note:

In the CASCADE function the banwidth and other

technical specifications can be affected.

The output of unit#1 must be connected to the input #1 of the second SW-81VA-2
and so on.

You must link all units by daisy chain the RCA LINK connectors at the rear panel
with the appropriate number of cables terminated with RCA plugs.

The CASCADE mode is enabled by DIP-Switches accessible on the backside of the
unit. Each unit must be indentified in the chain by the appropriate DIP-Switch
setting as indicated in the table and the drawing below.

DIP

Switch

Function Unit #1 Unit #2 Unit #3 Unit #4
#1 Cascade ON ON ON ON
#2 IN 01 - 08 ON

OFF OFF OFF

#3 IN 09 - 15 OFF ON OFF OFF
#4 IN 16 - 22 OFF OFF ON OFF
#5 IN 23 - 29 OFF OFF OFF ON
#6 IR Reception

User Manual SW-81VA-2

COMM-TEC GMBH SIEMENSSTRASSE 14 TELEFON [phone] WWW.COMM-TEC.DE

D-73066 UHINGEN TELEFAX +49(0)7161/3000-333 [e-mail]

The 6th DIP-Switch enables or disables the reception from IR remote control.
In ON position IR signal reception is enabled (default factory setting).

Note:

If the CASCADE function is enabled the three auxiliary functions are disabled,

except RGB Mute and Autoswitching can be activated by serial control (RS-232).

9.1 Control in CASCADE mode

In CASCADE mode a source can be selected by using the buttons on the front panel
of each unit or using a external serial controller.

For RS-232 control of the cascaded units all the pins#12 (Tx) of all units must be
joined together and connected to the serial controller, the same must be done with
all the pins #25 (Gnd).
For the serial codes see the table of commands in chapter 8.0.

User Manual SW-81VA-2

COMM-TEC GMBH SIEMENSSTRASSE 14 TELEFON [phone] WWW.COMM-TEC.DE

D-73066 UHINGEN TELEFAX +49(0)7161/3000-333 [e-mail]

10.0 Technical Specifications

Name 8-IN 1-OUT VGA/Stereo Audio Switcher
Type SW-81VA-2
Cat.-No. 708SW81VA2

Video

Input No. & connector 8x/ 15pin HD female
Input signal type analog 700 mVpp VGA/XGA
Input coupling DC
Crosstalk(worst case) 50 dB at 40 MHz
Bandwidth 400 MHz
Sync H+V separated, TTL level, high Z
Other signals ST, TTL level, high Z;

SDA, SCL, TTL level, high Z, bi-directional

Output, No.&connector 1x 15pin HD female, precompensated

Audio

Inputs 8x 2 RCA sockets
Outputs 2x RCA (unbalanced), 5pin screw terminal (balanced)
Input signal type Stereo unbalanced
Input Coupling AC
Input Impedance 47 KΩ
Input level +11 dBm Max.
Gain -0.5 dB, +6 dB on the bal. output
Frequency response -1 dB from 40 Hz to 20 kHz
Crosstalk 60 dB at 5 kHz
Distortion <0.03% at 0 dBm with 10 KΩ load
Output load 10 KΩ nominal, 600 Ohm minimum
Output impedance 100 Ohm

Main input 230 Volt AC / 50 Hz
Power consumption 6 VA
Housing 19" rack mountable, 2ru high, metal, slate grey RAL7015
Size (W x D x H) 483 x 120 x 88 mm
Weight 2.6Kg

Operating temperature
Range 0 – 45°C
Safety According to EN 60065
EMC According to EN 55103-1 and EN 55103-2.

Specifications are subject to change without notice

User Manual SW-81VA-2

COMM-TEC GMBH SIEMENSSTRASSE 14 TELEFON [phone] WWW.COMM-TEC.DE

D-73066 UHINGEN TELEFAX +49(0)7161/3000-333 [e-mail]

11.0 Warranty, Service and Returns Policy

This product is under warranty for a period of two (2) years from the date of
purchase.
COMM-TEC’s liability and Buyer’s remedies under this warranty shall be limited
solely to repair of the faulty units free of charge.
This warranty does not apply if the product has been modified, repaired by an
unauthorized agent, or improperly installed, used, or maintained.

If a problem occurs first contact your dealer or COMM-TEC for trouble shooting.
If verification of a problem requires factory repair, ask COMM-TEC’s Customer
Equipment Service representative to issue a

Return Materials Authorization (RMA) number.
Merchandise will not be accepted without a RMA number.
When returning a product to COMM-TEC in Uhingen for repair please comply with
the following instructions:

• Shipping and insurance costs must be prepaid

• Use original shipping container(s), (if possible)

• Indicate the RMA number clearly on the outside of each container

• Enclose a written description of the problem

The under warranty repaired units will be returned Carriage Free to the sending
party (dealer or consumer).

Outside the warranty period, COMM-TEC will repair the faulty units, charging all
arising expenses of the repair e.g. labor, parts, transportation and insurance, to the
sending party (dealer or consumer).

Note:

Service must be made by qualified personnel only.

For any problems during installation and operation of the SW-81VA-2

call the COMM-TEC hotline [phone],

send a fax [phone]

or e-mail to [e-mail]