RTS SSA-424A User Manual

User Instructions

P

O

W

E

R

4W LEVEL
REF SEL

LEVEL
SET

SYSTEM A

4W

2W

TO

TO

2

BAL

1

12

BAL

TW CHAN SEL

-10dB
0dB

+4dB

+8dB

+12dB

-15

-12 -9

-6 0

+3 +6

+9

+12

-3

4W LEVEL
REF SEL

LEVEL

SET

SYSTEM B

4W

2W

TO

TO

2

BAL

1

12

BAL

TW CHAN SEL

-10dB
0dB

+4dB

+8dB

+12dB

-15

-12 -9

-6 0

+3 +6

+9

+12

-3

SSA-424A

TMTM

SSA-424A Dual Digital Hybrid

ADAM, ADAM CS, and Zeus Intercoms

9350-7824-000 Rev C 10/2008

PROPRIETARY NOTICE

SHIPPING TO THE MANUFACTURER

The product information and design disclosed herein were originated by
and are the property of Telex Communications, Inc. Telex reserves all
patent, proprietary design, manufacturing, reproduction, use and sales
rights thereto, and to any article disclosed therein, except to the extent
rights are expressly granted to others.

COPYRIGHT NOTICE

Copyright 2006 by Telex Communications, Inc. All rights reserved.
Reproduction, in whole or in part, without prior written permission from
Telex is prohibited.

WARRANTY NOTICE

See the enclosed warranty card for further details.

CUSTOMER SUPPORT

Technical questions should be directed to:

Customer Service Department
RTS/Telex Communications, Inc.
12000 Portland Avenue South
Burnsville, MN 55337 USA
Telephone: [phone]
Fax: [phone]
Factory Service: 800-553-5992

RETURN SHIPPING INSTRUCTIONS

Customer Service Department
Telex Communications, Inc. (Lincoln, NE)
Telephone: [phone]
Fax: [phone]
Factory Service: 800-553-5992

Please include a note in the box which supplies the company name,
address, phone number, a person to contact regarding the repair, the type
and quantity of equipment, a description of the problem and the serial
number(s).

All shipments of product should be made via UPS Ground, prepaid (you
may request from Factory Service a different shipment method). Any
shipment upgrades will be paid by the customer. The equipment should
be shipped in the original packing carton. If the original carton is not
available, use any suitable container that is rigid and of adequate size. If
a substitute container is used, the equipment should be wrapped in paper
and surrounded with at least four (4) inches of excelsior or similar
shock-absorbing material. All shipments must be sent to the following
address and must include the Proof of Purchase for warranty repair.
Upon completion of any repair the equipment will be returned via United
Parcel Service or specified shipper, collect.

Factory Service Department
Telex Communications, Inc.
8601 East Cornhusker Hwy.
Lincoln, NE 68507 U.S.A.
Attn.: Service

This package should include the following:

QTY Description Part No.

Final Assy, SSA-424A

1

1 Power Supply 532026-000

1 Cord, Power 550006-100

1 User Manual 9350-7824-000

1 Statement of Conformity 38109-675

1 Warranty Statement 38110-389

or

Final Assy, SSA-424A with
option board

9010-7824-000

9010-7824-001

Table

of

Contents

CHAPTER 1

Description and Specifications ....................1

Front and Back Panel Descriptions ............2

Specifications ..............................................3

CHAPTER 2

Installation ...................................................5

Mounting ......................................................5

4-Wire Audio Connections ...........................5

ADAM, ADAM-CS, or Zeus Audio

Connection ...................................................5

Audio Connections for the Other 4-wire

Communications Systems ............................5

2-Wire Audio Connections ...........................6

RTS TW Audio Connections ........................6

Audiocom Audio Connection .......................7

Clear-Com Audio Connection .....................7

Other 2-wire Audio Connection ...................7

4-Wire Call Signal Connections ..................8

Call Signal Connection for ADAM, ADAM CS,

and Zeus .......................................................8

Call Signal Connections for other 4-wire

Communications Systems ..........................11

2-Wire Call Signal .....................................12

Call Signal Connections for Audiocom, RTS

TW and Clear-Com ....................................12

Call Signal Connections for Other 2-Wire

Communication Systems ............................12

General Description ...........1

General Features ...............1

Front Panel ....................2

Back Panel .....................2

CHAPTER 3

Operation ...................................................13

General Instructions ..................................13

Operating Notes for ADAM, ADAM CS and

Zeus Intercom Systems ..............................13

APPENDIX

Internal Access ..........................................15

Mode Dip Switch Settings ..........................15

Call Signal Option Card Installation ........16

1

2

CHAPTER 1

Description and Specifications

General Description

The SSA-424A Dual Digital Hybrid interfaces two, 2-wire
intercom lines to two, 4-wire intercom lines. Unlike earlier
analog hybrids, the SSA-424A features advanced digital
signal processing to achieve automatic nulling of the 2-wire
lines. Plus, each hybrid features convenient peak-reading
level meters to quickly match the levels between the lines
that are being interfaced. The result is easy and accurate
setup. With the SSA-424A, all need for test tones, nulling
adjustments and ducking adjustments have been eliminated.

Compatible 2-wire intercom systems include RTS™ TW,

Audiocom
systems include Telex’s ADAM™, ADAM CS™, and
Zeus™ Digital Matrix Intercom Systems.

The SSA-424A is also available with optional call signal
interfacing. This option provides bi-directional call signal
compatibility between the 2-wire and 4-wire intercom
systems.

With features like digital signal processing, peak-reading
level meters and option call signal interfacing, the
SSA-424A Dual Digital Hybrid assures ease of setup
maximum transparency between intercom systems.

®

, and Clear-Com®. Compatible 4-wire intercom

end to concerns about echo and feedback when interfacing
2-wire lines.

Peak Reading Level Meters: Quick and accurate visual
audio level adjustment. No extra setup equipment or
guesswork is required.

Direct ADAM/Zeus Audio Connection: Accepts standard
ADAM/Zeus DB-9 or RJ-11 keypanel cables.

Transformer Isolated: All audio inputs and outputs are
transformer isolated to prevent ground loops and hum.

Call Signal Option: Detects call signals from any of the
compatible 2-wire intercom systems, and then provides a
+5 VDC output to the 4-wire intercom system. Accepts a
contact closure input from the 4-wire system and converts it
to the call signal format required by the 2-wire system. The
SSA-424A can be directly connected to an ADAM, ADAM
CS, or Zeus GPI (General Purpose Interface). GPI inputs can
be programmed to activate call signals and audio paths to
any of the available types of communication with the 4-wire
system, including intercom ports, camera ISO circuits, IFB
circuits, etc. GPI outputs can be set up to place calls only
from a specific keypanel within the 4-wire system, or from
any keypanel within the 4-wire system that wishes to call the
2-wire system.

Features

Two Independent Hybrids: Interface two separate 2-wire
lines to two separate 4-wire lines.

Automatic Nulling: Digital hybrids eliminate all nulling
and ducking adjustments. Quick, trouble-free setup. Puts an

Half-rack Wide, 1RU High: Two SSA-424As fit into a
single rackspace. Compatible with RTS TW rack mount
hardware. Can be mixed with other TW equipment.

Universal Power Pack: Ready for worldwide use.
Automatically accepts any main voltage from 100-250 VAC,
50/60 Hz. Power pack equipped with locking DIN connector
for attachment to the SSA-424A.

1

Description and Specifications

AUX

J4B

J3B

J2B

J1B

J1A

J2A

J3A

J4A

AUX

4 WIRE SYSTEM 4 WIRE SYSTEM

2 WIRE SYSTEM

Telex Communications, Inc., Made in U.S.A.

-15 -12 -9

-6 0

+3 +6 +9

+12

LEVEL

SET

SYSTEM B

-15 -12 -9

-6 -3

0

+3 +6 +9

+12

4W

2W

TO

TO

SSA-424A

4W LEVEL

REF SEL

12

BAL

2W CHAN SEL

LEVEL

SET

SYSTEM A

-3

4W

2W

TO

TO

POWER

4W LEVEL

REF SEL

12

BAL

2W CHAN SEL

1

2

BAL
OFF

OFF

TM

RTN

+5V

RTN

+15V -15V

-15V 0.3A

+15V 1.6A

+5V 3A

J5 POWER

0dB

+4dB

+8dB
+12dB

-10dB

0dB

+4dB

+8dB
+12dB

-10dB

1

2

BAL

OFF

OFF

FIGURE 1. SSA-424A Reference View

Front and Back Panel Descriptions

Front Panel

There is a power ON/OFF and call indicator at the left of the
front panel. This indicator lights continuously when the
SSA-424A is turned ON and flashes when an incoming call
signal is detected, if the call signal option board is installed..
The remainder of the front panel is divided into controls and
indicators for the two separate hybrids, labeled SYSTEM A
and SYSTEM B. For each hybrid, there is a 10-segment,
peak reading level meter to display the 4-wire output level
(TO 4W). There is a recessed level set control to the left of
the 4-wire meter (LEVEL SET) and there is also a recessed,
5-position range select control for the 4-wire output (4W
LEVEL REF SEL). Under the
4-wire meter, is an identical meter for the 2-wire output
level, and there is a recessed level set control for the 2-wire
output to the left of the meter. Under the 2-wire meter, there
is a recessed, 5-position selector. The selector has two OFF
positions for when no 2-wire input is connected. The three
remaining switch positions select the 2-wire system as
follows: position 1 selects RTS TW channel 1; position 2
selects RTS TW channel 2 or a Clear-Com channel; the BAL
position selects an Audiocom balanced channel. There are 3
LED indicators to display the current selection.

Back Panel

The power pack connector is located at the right end of the
back panel. This is a locking DIN connector. The remainder
of the back panel is divided into connectors for the two
separate hybrids. Connectors are labeled with “J” numbers
followed by “A” or “B” to indicate System A or System B.
For each hybrid, there is an AUX connector. This is used to
connect to/from the optional call signal card. Below the
AUX connector, there are both a DB-9F connector and an
RJ-11 connector for 4-wire intercom connection. These are
directly compatible with standard ADAM/Zeus keypanel
cables. Next to the 4-wire connectors, there is a 3-pin female
XLR audio connector for connection to the 2-wire intercom
system.

2

Specifications

Specifications

2-Wire Ports

Input / Output Impedance

5,000 ohms, nominal

Operating Level

Audiocom: 1 V

RTSTW/ClearCom: 775 mV

4-Wire Ports

Input Impedance

10k ohms, nominal

Output Impedance

200 ohms

Operating Levels

-10 dBu, 0 dBu, +4 dBu, +8 dBu, +12 dBu

System to System

Frequency Response

200 Hz to 3.5 kHz, ±4 dB

THD: ≤ 1% @ channel output with nominal input

Environmental

Operating Temp

-20°C to 50°C (-4°F to 122°F)

Storage Temp

-40°C to 85°C (-40°F to 185°F)

Humidity

0 to 95%, non-condensing

Main Voltage

100 to 250 V

Dimensions

1.72” (44mm) High x 8.19” (208mm) Wide x 8.0” (204mm) deep

Wei ght

5.0lbs (2.3kg)

Finish

Thermoplastic front panel, aluminum case, light gray finish

Approvals

UL, CSA, UDE, CD

Specifications subject to change without notice.

AC, 50/60 Hz

RMS

, nominal

RMS, nominal

3