Acom 2S1 User manual

ACOM 2S1
Automatic XCVR Commutator
User's Manual
Installation, Operation
and Maintenance
June 2022
OUTSTANDING HF POWER PRODUCTS

User's Manual | ACOM 2S1 | Automatic XCVR Commutator
Page 2of 32 | S e c t i o n ABOUT DOCUMENTATION
June 2022
This manual is for electronic distribution mainly.
If you have it on paper and you no longer need it, please, recycle it!
The latest versions of our User's Manuals are available at
www.acom-bg.com

User's Manual | ACOM 2S1 | Automatic XCVR Commutator
June 2022
S e c t i o n ABOUT DOCUMENTATION | Page 3of 32
ABOUT DOCUMENTATION
All ACOM documentation (including manuals, brochures, specifications, descriptions, presentations, video
materials, etc.) are based on the latest available information at the time of creation of our documents.
As we always strive to constantly improve and update our products, ALL PRODUCTS, PRODUCT
SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE. ACOM reserves the right to make changes and
improvements at any time without further notice or obligation to notify any person or organization of such
revisions or changes, made in order to improve the reliability, function, quality and design, and/or
performance of the ACOM products and services.
Further, this User's Manual is provided AS IS and ACOM shall not be liable for possible errors contained
herein.
This manual supersedes all previous editions, which thereby become invalid.
The cover images used in the manual are illustrative only.
We are continuously striving to improve our documentation, but nobody is perfect.
And our documentation is not an exception of this rule.
Have you found any errors or would you like to suggest changes in our documentation?
Please help us by sending your suggestions to the following e-mail address:
[e-mail]
The latest versions of our User's Manuals are available at
www.acom-bg.com
We highly recommend you to use this manual in electronic form as PDF-file instead of printed version. The
PDF-file is easy to read on any computer, tablet, smart phone or other similar device. In the PDF file you will
find the necessary information very fast due to context-oriented links (marked in orange) inside the file,
including context-linked Table of Content.
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PDF readers.

User's Manual | ACOM 2S1 | Automatic XCVR Commutator
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June 2022
Title of Documentation
ACOM 2S1 Automatic XCVR Commutator
User's Manual
Installation, Operation and Maintenance
Type of Documentation
User's Manual
Purpose of Documentation
This manual explains Installation, Operation and Maintenance of the
ACOM 2S1 Automatic XCVR Commutator.
Record of Revisions
Description
Release Date
Notes
ACOM 2S1 User's Manual
04.1999
First edition
ACOM 2S1 User's Manual
22.06.2022
Second edition, R01
Validity
The specified data is for product description purposes only and may not be
deemed to be guaranteed unless expressly confirmed in the contract. All
rights are reserved with respect to the content of this manual and the
availability of the product.
Copyrights
© 2022 ACOM Ltd.
Copying this document, giving it to others and the use or communication
of the contents thereof without express authority, are forbidden.
Offenders will be held liable for infringement of any intellectual property
of ACOM Ltd. and all damages which may rise as a result.
Trademarks
ICOM, KENWOOD, YAESU, ELECRAFT, and other product names or brands
mentioned in this documentation are either registered trademarks or
trademarks of their respective holders.
Published by
ACOM Ltd.
Bulgaria | Bozhurishte 2227
Sofia-Bozhurishte Industrial Park | 6 Valeri Petrov Str.
GPS coordinates: 42.748616о| 23.209801о
Web: www.acom-bg.com
E-mail: [e-mail]
Note
This manual has been printed on chlorine-free bleached paper.

User's Manual | ACOM 2S1 | Automatic XCVR Commutator
June 2022
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Contents
ABOUT DOCUMENTATION ................................................................................................................................ 3
1. GENERAL INFORMATION........................................................................................................................... 7
1.1. Introduction and Description.......................................................................................................... 7
1.2. Product History and Documentation Validity ................................................................................. 8
1.3. Owner Assistance............................................................................................................................ 9
1.4. Equipment Supplied........................................................................................................................ 9
1.5. Features......................................................................................................................................... 10
1.6. Safety Considerations, Explicit Definitions.................................................................................... 11
2. INSTALLATION.......................................................................................................................................... 14
2.1. Unpacking and Initial Inspection................................................................................................... 14
2.2. Commutator Location Selection.................................................................................................... 14
2.3. Connections................................................................................................................................... 14
3. INITIAL CHECK AND OPERATION ............................................................................................................. 19
4. MAINTENANCE ........................................................................................................................................ 21
4.1. Periodic Maintenance ................................................................................................................... 21
4.2. Cleaning......................................................................................................................................... 21
4.3. Schematic Diagram........................................................................................................................ 21
4.4. Troubleshooting ............................................................................................................................ 24
5. SPECIFICATIONS....................................................................................................................................... 25
5.1. Parameters.................................................................................................................................... 25
5.2. Functions....................................................................................................................................... 25
5.3. Regulatory Requirements ............................................................................................................. 26
5.4. Storage and Shipment................................................................................................................... 26
5.4.1. Storage Environment....................................................................................................... 26
5.4.2. Shipping Size and Weight ................................................................................................ 26
5.4.3. Transportation................................................................................................................. 26
5.4.4. Returning to the Service Provider ................................................................................... 26
5.5. Information on Disposing and Recycling of Old Electrical and Electronic Equipment.................. 28
NOTES.............................................................................................................................................................. 29

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Figures
Figure 1-1 | Production Version Release Date 11.1999 .................................................................................... 8
Figure 1-2 | Production Version Release Date 04.2022 .................................................................................... 8
Figure 2-1 | Rear panel - Connections............................................................................................................. 14
Figure 2-2 | Control cables YAESU FT-990 and FT-1000MP transceivers........................................................ 15
Figure 3-1 | Front panel - Indicators ............................................................................................................... 19
Figure 4-1 | Schematic diagram, Part 1........................................................................................................... 22
Figure 4-2 | Schematic diagram, Part 2........................................................................................................... 23
Tables
Table 1-1 | Production versions history............................................................................................................ 8
Table 1-2 | Package contents............................................................................................................................ 9
Table 2-1 | Control cable wiring for YAESU FT-990 and FT-1000MP transceivers.......................................... 16
Table 2-2 | Signals and pin out of the CONTROL A/B connector .................................................................... 17

User's Manual | ACOM 2S1 | Automatic XCVR Commutator
June 2022
S e c t i o n GENERAL INFORMATION | Page 7of 32
1. GENERAL INFORMATION
Congratulations on purchasing of our exclusive ACOM 2S1 Automatic XCVR commutator.
ACOM is pleased that you have chosen one of our products, and we will endeavor to provide you with the
information and support you need to enjoy your purchase for many years.
We urge you to read all of the following materials before you embark on installing and using your new
ACOM 2S1 Automatic XCVR commutator.
1.1. Introduction and Description
This manual explains:
•Installation,
•Operation and
•Maintenance
of the ACOM 2S1 Automatic XCVR commutator.
The ACOM 2S1 is a TX/RX commutator that allows two transceivers to use a common load. It guards each
transceiver's input while the other transceiver transmits, prevents simultaneous transmission, and allows
simultaneous reception.
ACOM 2S1 commutator is especially designed to complete the ACOM 2000S/SW (ACOM
2000S automatic antenna selector plus ACOM 2000SW remote antenna switch) and the
ACOM 2000A automatic HF linear amplifier.
For details about ACOM 2000A, ACOM 2000S, and ACOM 2000SW, please, visit
www.acom-bg.com.
Nevertheless, ACOM 2S1 may be used to commutate an antenna only, or can be adapted in other systems,
too. Its operation is fully automatic and the full break-in (QSK) mode is standard.

User's Manual | ACOM 2S1 | Automatic XCVR Commutator
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June 2022
1.2. Product History and Documentation Validity
The ACOM 2S1 commutator serial production started in November 1999. The production has continued to
these days without functional changes and with hardware improvements only.
This manual refers to the ACOM 2S1 Automatic XCVR Commutator and describes the operating possibilities
of all commutators produced till the publishing date of this manual.
This manual is valid till a new manual is issued.
Table 1-1 | Production versions history
Production Version
Release Date
Notes
11.1999
Basic design, metal outside box in RAL 8019 color;
04.2022
New metal outside box (in black color); No functional changes;
Table 1-1 | Production versions history
Figure 1-1 | Production Version Release Date 11.1999
Figure 1-1 | Production Version Release Date 11.1999
Figure 1-2 | Production Version Release Date 04.2022
Figure 1-2 | Production Version Release Date 04.2022

User's Manual | ACOM 2S1 | Automatic XCVR Commutator
June 2022
S e c t i o n GENERAL INFORMATION | Page 9of 32
1.3. Owner Assistance
If assistance is needed, you should contact your local dealerfirst. If necessary, your dealer will contact ACOM
for additional guidance.
If you still have an issue you need to discuss with one of ACOM's specialists, the contact information is as
follows:
ACOM Ltd.
E-mail: [e-mail]
Bulgaria | Bozhurishte 2227
Sofia-Bozhurishte Industrial Park |6 Valeri Petrov Str.
GPS coordinates: 42.748616о| 23.209801о
1.4. Equipment Supplied
The ACOM 2S1 automatic XCVR commutator is shipped in a cardboard carton.
The ACOM 2S1 is shipped as package, consisting of:
Table 1-2 | Package contents
Nr.
PACKAGE CONTENTS
Pcs.
1
ACOM 2S1
1
2
Control cables*, 3 m
2
Table 1-2 | Package contents
The User's Manual is available as PDF-file only.
The latest version of the User's Manual is available at www.acom-bg.com.
NOTICE
* Control cables are directly suited for YAESU FT-990 and FT-1000MP transceivers
(BAND DATA connectors).
If any of your transceivers is different, you'll need to replace the 8-pin, DIN connector or
make a suitable adapter (see Section 1.1.d) CONTROL A and CONTROL B connectors).
Using an inappropriate cable may cause a serious damage to the ACOM 2S1 commutator
and your transceivers (not covered under warranty)!

User's Manual | ACOM 2S1 | Automatic XCVR Commutator
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June 2022
1.5. Features
•Automatic operation
Operation is fully automatic and the full break-in (QSK) mode in CW is standard.
•Easy to use
The ACOM 2S1 may be used to commutate an antenna only or can be adapted in other systems, too.
ACOM 2S1 is especially designed to complete the ACOM 2000S automatic antenna selector and ACOM
2000SW remote antenna switch, and the ACOM 2000A automatic HF linear amplifier.
•Integrated power supply
There is no need of external power supply device. The ACOM 2S1 uses power supply directly from the
transceiver (11-14 VDC / 30 mA power supply).