RTS 848A, DC848 Technical Manual

TM5545

/

O/N 9380-5545-80

Rev

E

Matrix

Data Connector

Intercom

O/N 9000-5545-00

Station

81N 9000-5556-08

RTS

A

TELEX COMMUNICATIONS PRODUCT

SYSTEMS

PROPRIETARY NOTICE

UNPACKING AND INSPECTION

The information and design disclosed herein were originated by and are the property of RTS Systems. RTS S ystemsreserves all patent, proprietary design, manufactur-

and

ing, reproduction, use article disclosed therein, except to the extent rights expressly granted

COPYRIGHT NOTICE

PATENT NOTICE

This product contains and uses a design embodied States Patent No. 4,358,644: "BILATERAL CURRENT SOURCE FOR A MULTI-TERMINAL INTERCOM". This design employs a bilateral current source operated as a two-wire to four-wire converter.

Technical Manual, Model 848A Matrix Intercom System Model DC848 Data Connector

This manual is published by the Engineering Department of RTS Systems, which is responsible for its contents.

Address communications regarding this manual to:

Sales Engineer RTS Systems The Center at Burbank Airport 2550 Hollywood Way, Suite 207 Burbank, CA 91505 USA

Unpacking Information ii Warranty iii Return Shipping Instructions Description and Specifications Installation Operating Instructions Theory of Operation .4- 1 Maintenance, Test Procedures

&

Troubleshooting 5-1

to

TM5545

QUICK

tice

..............

sales rights thereto, and to any

others.

in

United

TABLE

.............

OF

CONTENTS

...........

ii ii

.........

.......

......

.........

iii

1-1

2-1

3-1

.........

..........

are

Immediately upon receipt of the equipment, inspect the shipping container and the contents carefully for any dis- crepancies or damage. Should there be any, notify the

and

freight company The Model 848A Matrix Intercom Station shipping con-

tainer should contain the following components: Ordering Number 9000-5545-00

RTS Systems

atlr

1

17 2006-0014-00 Terminal Connectors,

1

The Model DC848 Data Connector shipping container should contain the following components:

Ordering Number 9000-5556-00

Qty

1 1

1

"Warning:

radio frequency energy, and if not installed and used in accordance with the instruction manual, may cause inter- ference to radio communications. It has been tested and found to comply with the limits for a Class A computing device pursuant to Subpart are designed to provide reasonable protection against such interference when operated in a commercial environment. Operation of this equipment cause interference in which case the user, at his own ex- pense, will be required to take whatever measures may be required to correct the interference."

-

9010-5545-00 Model 848A 9300-5545-00 Technical Manual 9020-4979-00 Power Supply Assembly

2006-0075-00 15-pin connector

RTS Systems

Part

Number Desctipti~ 9000-5556-00 Model DC848 9300-5545-00 Technical ~anuh 9020-4979-00 Power Supply Assembly

This equipment generates, uses,

the dealer at once.

pin crimp

locking ramp

NOTICE

J

of Part

15

ofFCC Rules, which

in a residential area is likely to

with

.

'4

?\%

and

can radiate

-Page

ii-

RTS SYSTEMS' LIMITED WARRANTY

RETURN SHIPPING INSTRUCTIONS

The products of RTS Systems are warranted to defects in materials and workmanship for a period of three years from the date of sale.

RTS Systems sole obligation during the warranty period is to provide, without charge, parts and labor necessary remedy covered defects appearing prepaid to RTS Systems. This warranty does not cover any defect, malfunction or failure caused beyond the control of RTS Systems, including unreasonable or negligent opera- tion, abuse, accident, failure to follow instructions in the Service Manual or the User Manual, defective or improper associated equipment, attempts at modification and repair not authorized by RTS Systems, and shipping damage. Products with their serial numbers removed or effaced not covered by this warranty.

To obtain warranty service, follow the procedures entitled "PROCEDURE FOR RETURNS" and "SHIPPING TO MANUFACTURER FOR REPAIR

This warranty is the sole and exclusive express warranty given with respect toRTS Systemsproducts. It is therespon- sibility of the user to determine before purchase that this product is suitable for the user's intended purpose.

ANY AND ALL IMPLIED WARRANTIES, INCLUD- ING THE IMPLIED WARRANTY OF MERCHAN- TABILITY ARE LIMITED TO THE DURATION THIS EXPRESS LIMITED WARRANTY.

NEITHER RTS SYSTEMS NOR THE DEALER WHO

SELLS RTS SYSTEMS' PRODUCTS IS LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES OF

ANY KIND.

in

OR

be

free

from

to

products returned

are

ADJUSTMENT".

OF

Procedure For Returns If a repair is necessary, contact the dealer where this unit

was purchased.

If

repair through the dealer is not possible, contact the Customer Service Department, located at the factory by telephone, as directed below, to obtain a RETURN AUTMORIZATION NUMBER.

DO NOT RETURN ANY EOUIPMENT DIRECTLY TO THE FACTORY WITHOUT FIRST OBTAINING

A

RETURN AUTHORIZATION NUMBER.

Be prepared to provide 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

Questions regarding returns for repair should be directed to:

SHIPPING TO MANUFACTURER FOR REPAIR OR ADJUSTMENT

All shipments of RTS Systems equipment should be via United Parcel Service or the best available shipper. The equipment should

if that and of adequate size. If a substitute container is used, the equipment should at least four inches of excelsior or similar shock-absorbing material. All shipments should be directed to the attention of the Customer Service Department and must include the Return Authorization Number.

number(s).

Customer Service Department RTS Systems The Center at 2550 Hollywood Way, Suite 207 Burbank, CA Telephone: (818) 566-6700 Telex: 194855 Telefax: (818) 843-7953

Burbank Aiiort

9

1505 U.S.A.

a

be

shipped in the original packing carton;

is

not available, use any suitable container that is rigid

be

wrapped in paper and surrounded with

Upon completion of any repair the equipment will be returned collect via United Parcel Service or specified ship- per.

Model

TECHNICAL

848A

Matrix Intercom Station / Model

MANUAL

DC848

Data Concentrator

TD OTHER

TW

STATIONS (IF USED);

PSWPS31

INTERCOM

POWER

SUPPLY.

Model

848A

Note:

This block diagram shows a full size system with cable connections for the matrix intercom signals (50-conductor cable), the Pchannel conference-line signals (3-conductor cable), and the serial data bus signals (single-pair, twin shield cable). Alternate cabling schemes and systems arrangements can suit individual requirements.

Figure System

Page

1-1

Block

iv

Diagram

be

configured to besl

Model

TECHNICAL MANUAL

848A

Matrix Intercom Station / Model DC848 Data Concentrator

Appendix A

Table A-d.

Location versus Address Assignment and Cabling

Log

Page

A-1

ADDENDUM TO MODEL 848A/DC848

TECHNICAL

MANUAL

ADDENDUM

Model

by hitting [return] a user may

each of the forth between the two Matrix Displays, the [esc] and [return] keys are alternately used. Status of the bottom- row buttons

Store Configuration: In the System Configuration Menu, when you use the Store Configuration option, the system may store either the pre-programmed configuration or both the preprogrammed and the actual panel configuration

retrieving

.stored configuration, none of the crosspoints currently selected at each panel

retrieved ~o~guration to them. To retrieve only the exact pre-programmed crosspoints, you must use the Reset System option prior to retrieving the configuration.

8slSA/DC848

TW

Dynamic Matrix Display screen: In the System Status Menu, after viewing the Dynamic Matrix Display,

24

panels. Hitting [return] again will then return the user to the Main Menu. To view back-and-

is

indicated using the following abbreviations:

as

it appears at the user station. When you retrieve the conftguration, you have the option of

all

the. crosspoints or only the pre-programmed (from the DC848) crosspoints. When you retrieve a

software update to Version

1

call

up

an

additional display showing the status of the bottom-row buttons for

=

Talk

T1 L1 = Listen

T2

=

Talk 2

L2

=

Listen

/

SP = Speaker

=

MS

=

ALL

AT PM = Panel Mic

1

2

Mic Switch

TALK

6.5

has added the following features:

will

be interrupted; it

will

add the

Mic Kill: In the System Configuration Menu, listed as Number

that all microphones

in

the system are off.

Page Al-l

4

is

now a "Mic

Kill"

option, which assures

TECHNICAL MANUAL

Model 848A Matrix Intercom Station / Model D6848 Data Concentrator

Table

A-2

Parts

List

Reference:

Vendor Directory

Name

3M

AHAM ALLEN-BRADLEY AMATOM AMER RESEARCH AMPHENOL-BENDIX AP PRODUCTS APTRON

I

CS BELDEN BERG, U.M. INC. BOURNS BURNDY CORP BUSSMANN C&K CALRAD IMPORTERS

I

ON

CAMB CANNON USA CONDOR DALLAS SEMI

DENNISON

EAO SUITCH CORP FAIR-RITE F EK FOX ELECTRONICS HIROSE USA HITACHI AMERICA JKL LICON

MOLEX MOTOROLA MWSER

NATIONAL

I

K

NEUTR NPN OAKTRON

Cage Code

Address

BLDG. 502, POB 2963 AUSTIN TX 78769-2963

27901

FRONT STREET, RANCHO CALIF,

1414 ALLEN-BRADLEY DR, EL PAS0 TX

446 BLAKE ST, NEW HAVEN CT 06515

1500 EXECUTIVE DRIVE, ELGIN, 2122 YORK RD, OAKBROOK IL 60521 9325 PROGRESS PKWY, MENTOR OH 44060 9450 PINENEEDLE DR, MENTOR, OH 44060 PDB

1980,

RICHMOND IN 47374

499 OCEAN AVENUE, EAST ROCKAUAY NY 11518

1200 COLUMBIA AV, RIVERSIDE CA 92507 RICHARDS AVENUE, NORWLK CT 06856

W

POB 14460, ST. LWlS

15 RIVERDALE AV, NEWTON

819

1.

HIGHLAND, HOLLYWOOD

10550 TALBERT AV, FOUNTAIN VALLEY CA 92708 580 UEDDELL

300 HOWARD ST, FRAMINGHAM MA 01701 MILFORD CT

PO BOX

6225 PRESIDENTIAL CT, FT MEYER FL 33907 9254 DEERING AV, CHATSUORTH CA 2210 OfVOOLE AV SAN JOSE CA 95131

13343 PAXTON ST, PACOIMA CA 6615 IRVING PK RD, CHICAGO IL 60624 2222 WELLINGTON CT, LISLE IL 60532 3102 N 56TH ST PHOENIX AZ 85018

11433

11731

1913

SEE MOTOROLA

PO BOX 53143, MILUAUKEE UI 53288

DR

#3,

J,

UALLKILL NY 12589

WOODSIDE AV, SANTEE CA 92071 MARKON DR, GARDEN GROVE CA 92641

ATLANTIC AVENUE, MANASQUAN

63178

MA

02158-1082

CA

SUNNYVALE CA 94089

IL

90038

91311

91331

CA

92390

79936

60120

n

j

Phone

Other

ELECTRONIC PRODUCTS DIVISI""

AT1 HEATSINKS

DBA DIV. ROCKUELL DIV. MITE CO

DIV. OF 3M 3M PRODUCT DIVISION ELECTRONIC DIVISION

DIV MIDLAND ROSS

APPLYING FOR CAGE CODE

SEMICONDUCTOR

DIV. ILL TOOL WORKS

SEMICONDUCTOR DIV

DIV. HH SMITH

&

IC DIV

Page

A-2

Model

TECHNICAL

$48A

Matrix Intercom Station / Model DC848 Data Concentrator

Parts

Vendor Directory,

MANUAL

List Reference:

cont'd

PANDUI T PEW PENN ENG PIHER RCA ROBINSON NUGENT INC SAMTEC SCHURTER SELCO SIFAM SIGNETICS SILICONIX SMART SMITH, HH (DIALIGHT) SWTHCO SPECTRA STANLEY SWITCHCRAFT THERMALLOY TRW CONN

&

MANU

17301 RIDGELAND AV, TINLEY PK IL 60477-0981 PO BOX 1000, DANBORO, PENN

DANBORO, PA

903

FEEHANWILLE DR, MT PROPSPECT IL 60056

800 E 8TH ST, NEU ALBANY IN 47150

810

PROGRESS BLW, NEW ALBANY NY 47150

1016

CLEGG CT, PETALUMA CA 94952

7580

STAGE RD, BUENA PK CA 90621

SEE SELCO

811

E ARGO AV, SUNNYVALE CA 94086 2201 LAURELUOOD, SANTA CLARA CA 95054 SEE DALLAS SEMICONDUCTOR

1913

ATLANTIC AV, MANASQUAN NJ 08736 212 N BRINTON LAKE RD, CONCQRDVILLE PA SEE AMPHENOL

10

OCEAN AV, COPIAGNE NY

5555 N ELSTRON AV, CHICAGO IL 60630-1314

2021

W VALLEY VIEW LN, DALLAS, TX 75381

1501 MORSE AV, ELK GROVE VILLAGE IL

19816-

1000

18916

19331

11726

60007

312-532-1800 215-766-0371 215-766-0371 312-543-6400

SOLID STATE DIV

812-945-0211

81

2-944-6733

707-778-631

714-521-8673 ALSO: SEL SALES, INC

516-842-8866

214-243-4321

31

2-987-6000

1

DIV OF

RAYTHEON

Page

A-3

Model

TECHNICAL MANUAL

848A

Matrix Intercom Station / Model

Table

Parts List Reference:

Cage Code Cross-Reference

A-3

DC848

Data Concentrator

OEM Part

No

OEM CAGE CODE Vendor Part No

EC100F-5 8216-A-0632 9293 9475A0632 2334 95328-8-0440 95328-8-0440 95348-

99-910 A4-10-501-20 3341-1L THlS4 KF2-440 EC100F-3 852200F006 81AlA-824-S15 PTClOLVPlOK PTlOyv20K MR502 J305/E305 2N5210 74HC04 63A03RP 74HC573 74H6139 LM317 LM3800N-8 LM383T CD4053 BE NE5532-N ESBR3441 8099SBP K405 99-456 DIL8P-108 DIL14P-108 DIL14P-108

1416-6 1416-6

-

S

8-0632

Log

VENDOR

06383 06540 83330 06540 83330 06540 06540 06540 83330 83330 61 706 94222 04963 06383

CAGE

46384

06383 04713 08116 54869 54869 04713 17856 04713 27014

HITACHI

27014 27014 27014 27014 27014 02735

18324 61544 55335 65832 61706 09922 09922 09922

CODE

Item

of

Sum~y Part

No

CAGE CODE

Page

A-4

Model

TECHNICAL

848A

Matrix Intercom Station / Model DM Data Concentrator

MANUAL

OEM Part No OEM

60572 60572 60572 60572 60572 60572 60572 60572 60572 60572 60572 60572 60572 68572 60572 60572 60572 60572 60572 60572 60572 60572 60572 60572 60572 60572 60572 60572 60572 60572 60572 60572 60572 60572 60572 60572

60572 60572 60572 60572

CAGE

Vendor Part No

CODE

.

.-

~1~16~-108- DIL40P- 108 DS1213 DS1213 DIL20P-'08

1CT-286-S-X 65610-410 30-552A 30-560A 30-550A

09-65-1031

09-50-3041

08-50-0108

08-50-0106

09-50-3031

09-50-3021

09-75-1158

09-74-1061

09-74-1031

08-50-0106

65610-410

65610-420

65610-426

08-50-0106

65610-414

66900-014

3473-6016

6561 1-410

3428- 1202

929647-01 -06

HLSS100-3

HLSS100-5

HLSS100-10

57- 10500-27

66900-020

3399-6026

861178EFRA9S

VENDOR CAGE CODE 09922

-

09922 DALLAS SEMI SMART/BALLAS SEMI 09922 06776 29440 535 14 535 14 53514

27264 27264 27264 27264 27264 27264 27264 27264 27264 27264 29440 29440 29440 27264 29440 29440 29440 29440 04963 29440 04963 80266 06383 06383 06383 06383 74868 29440 04963 74860

I

tern

of

-.

-

.

-

--

Supply

Part No CAGE CODE

-

--

-- - -

-

.

Page

8-5

Model

TECHNICAL

848A

Matrix Intercom Station / Model

MANUAL

DC848

Data Concentrator

MN114B MN114B 30-454 30-453 AXR-5-31

HA16PR-3s SEP- 10K8-02 CE100F24-3 CE100F24-5 30-453 AXR-5-31 WP664012CG

LM9003

LM9003 42TM018 542- FB43-287 542-FB73-287 8431352801 020 8431352801026 8431352801010 8022 922345-02 S210-250 S210-250 C212 99-920.8 MDL-2

031.1666 FAUO3l .3573 049 249 7-362

-

BA

82389 82389 535 14 53514 71468

0ag18

55322 06383 06383 53514 71468 59940 081 16 081 16 5081 1 5081

1

5081 1 74868 74868 74868

16428 80266 59270 59270 59270 61 706 71400

FEK

61935 61429 13103

1e188

Page

A-6

Model

TECHNICAL MANUAL

848A

Matrix Intercom Station / Model DC848 Data Concentrator

REVISIONS FOR THE

Date Edition

-

6/89 3rd Cover Added: Second Printing, June 1989. 6/89 3rd Cover Changed: 9010-5545-00 to 9000-5545-00.

6/89 3rd 6/89 3rd 6/89 3rd 6/89 3rd 6/89 3rd

SECOND

Pave No.

ii Added: Second Printing, June 1989. ii Changed: Edited 6-14 Added: Page 6-14 (missing in previous edition). 7-11 7-25 Repalced: Drawing SD300-09 with

PRINTING:

of

Descriotion

-

7-17 Deleted: "A" from the

Revision

by

to Sheryl

848.

D.

Thompson.

SD3000

sheet

#11.

RTS Systems,

Inc.

Burbank,

CA

91506 / FSCM: 60572 'I'M5545 / Third Edition, August

Page A-7

1988

TECHNICAL

MANUAL

Model

SECTION

1.1

1.1.1

(See Figure

1:

DESCRIPTION & SPECIFICATIONS channel. The conference line channels and point-to-

DESCRIPTION

System and Model WA Description

1-1,

Model

848A

Matrix Intercom Station / Model DC848 Data Concentrator

848A

System Block Diagram)

Point-to-Point Matrix Intercom

A

Model

tions, connecting cables,

848A

system consists of Model

and,

848A

sta-

optionally, a Model DC848 Data Concentrator and data terminal (a per- sonal computer

Each

848A is

system which

as

24

stations. Each station

can

be

used as a terminal).

a station in a point-to-point intercom

can

have

as

few

as 2 stations or

can

talk to a single station

as

many or combination of other stations. Any configuration of multiple stations

called a matrix. In the matrix, up to

in

this system is

12

separate conversations may be in progress at any time. Each conversation requires two talk paths to two listen

buses. Each talk path is the listen bus for one of the

twenty four stations.

point channels may

848A

Model Each Model

be

used at the same time.

Station Micro~rocessor

848A

is equipped with an internal micro-

processor which provides electronic switch-action

link

(momentary /latching), and a

to the Model DC848 Data Concentrator. If the power fails, the station remembers its settings. The settings are re- stored when the power returns.

1.12

System

Connecting a Model DC848 to the

and

Model DC848 Description

848A

system adds

these functions to the system:

1.

CallTally

2.

Received Call Stacking

3.

Remote-Control / Programming Capabilities

1.

The Call Tally function means that the pushbutton

corresponding to the calling station

will

flash on the called station's panel, telling the operator visually which station is calling.

In a typical operating example, a user (caller) chooses the station he wishes to talk to by pressing the push- button corresponding to the called station. The

can

station station same listen bus

then hear the calling station. No other

can

hear this message unless it shares the

as

the called station or more than one

called

station has been called by the caller. The called station answers tbe calling station by

pressing the pushbutton corresponding to the calling station. If the

848A

system includes a DC848 Data

Concentrator, a call may also be answered by pressing

call

the

answer pushbutton, which is marked with the station's own number with a colored insert. When the communication is completed, each station releases and the connection is broken.

A station

can

talk to all other stations at once, by

pressing the ALL TALK button. Conference Intercom

TW

Each Model 848A station has two

Intercom con-

ference-line channels, which either connect to an RTS

TW

Systems

Intercom System, or interconnect 848A stations for two channels of isolated conference inter- com. These conference lines, Channels

1

&

2,

have

front panel TALK and LISTEN switches for each

2.

The Received Call Stacking function means that station will

can

is

called by several stations, the called station

make a queue of the calling stations. This queue

be answered in succession by pressing the Call

if

Answer pushbutton.

3.

The Remote Control / Programming Capabilities

allow the Model

848A

to be controlled and programmed remotely by connecting either a computer or a "dumb" terminal to the Model DC848 data bus. The software for the 848A and

DC848

lets

each station be programmed individually in real-time. Features programmable with this setup include: a. Forced Crosspoint. Sets up a one way voice

communication path between two stations.

b. Inhibit Crosspoint. Inhibits voice path and tally,

one way, between two stations.

(Continued)

a

Page

1-1

TECHNICAL

MANUAL

Model

Panel Switch Action (Latch Disable). Sets the

c.

switch action for an individual panel switch, either momentary only or both momentary

and latching.

Hands-Free Answer (Auto

d.

e.

f.

g.

h.

station automatically to allow hands-free answering

"Instant

'!Instant Sveaker OQ".

Auto Talh,

Panel Grou~ Assignments. Assigns panels into

preset groups.

is

Mic

Onw.

turn on automatically whenever a call originated.

turn on automatically whenever the station

is

called.

Flash

pushbutton will flash when called. Can set from a 10-second minimum to a second maximum in

84&4

Matrix Intercom Station / Model DC848 Data Con=nt,rator

Reci~rocal). When a

called, 'its microphone turns on

When set, the microphone

When set, the speaker will

Erne.

Adjusts the time the

10

second increments

in a system with a DC848 connected. This button

also

the station address.

All

pushbuttons have two levels of brightness.

activated button has a higher brightness.

The third row of eight pushbutton switches are

follows:

1

TALK INTERCOM CH.l

1

LISTEN INTERCOM CH.l

TALK

MIC

(selects panel microphone when

ON or headset microphone when

or headset, whichever PANEL MIC switch)

848A

Connections, Inputs and Outputs

will

is

be

60-

COW CONF COW 2 TALK INTERCOM CH.2 CONF 2 LISTEN INTERCOM CH.2

ALL

PANEL

SPKR ON (spe OT er on) MIC ON (enables mic circuit in either panel mic

1.1.4

Model

Front Panel

is

selected by

is

An

as

Dvnamic Comlink Dis~la shows stations

a.

that are connected and responding to the DC848 data concentrator.

b.

wy

possible talk paths in current system and their status.

j.

Svstem Confirmration. Allows preset

be

configuration to retrieved. There

Password Security. Sets a password, preventing

k.

unauthorized use, either by terminal or modem.

1.13

Model

The operational controls are:

Three rows of pushbutton switches, and The master VOLUME control.

The fvst two rows of the called point to point matrix stations, except for the one pushbutton with a colored insert.

is

the "Call Answer" pushbutton, and

ton

848A

Operational Controls

stored into memory, and

is

also a reset choice.

24

pushbutton switches select

shows all

This

pushbut-

is

active only

Dynamic Microphone Headset Connector.

Carbon Microphone Headset Connector. Rear Panel POWER

AUXILIARY CONNECTION connector, 5104.

TW

EXTERNAL LOUDSPEAKER connector, SERIAL IN connector, SERIAL LOOP-THRU connector,

LINE

Auxiliarv Connections

The auxiliary connections on the back panel of the Model an unswitched microphone preamplifier output and additional connections to the front panel.

The program input accepts a -10 dBu signal which

distributed to both the loudspeaker and the headsets.

The level The unswitched microphone output provides a

10 dBu line level signal from the Model microphone preamplifier.

INPUT

INTERCOM SYSTEM LINE

5602 (Conference Line, Two Channels).

connector,

5702

(12

volt ac/dc).

INPUT

51001.

51002.

CONNECTION connector,

848A

provide the user with a program input,

can

be

adjusted on the adjustment card.

5401

connector,

5204.

848A

is

-

Page 1-2

TECHNICAL

MANUAL

Model

848A

Matrix Intercom Station / Model DC848 Data Concentrator

Additional connections for an external panel microphone and headset. A remote microphone

switch

foortswitch,

together to

1.1.5

is

also available. Any switch, such as a

can

be used to short the two terminals

turn

on the microphone circuit.

Model 848A

Preset

(Trimpot)

Adjustments

The preset adjustment pots are located behind the

small

rectangular panel to the left of the loudspeaker. To access the adjustments, press the rectangular panel lightly, then release, this will unlock the panel. Pull the panel out

far as it

will

go.

as

Behind this small panel, on a circuit board, in two rows, are the following ten adjustment pots:

Top Row

LISTE!.N/TW LISTEN/TW 2

1

Conference Line 1 level Conference Line

2

level LISTENIALL (Talk) Page level LISTENIMATRIX

24

point-to-point stations

LISTE!.N/PGM Auxiliary program

1.1.7

Package

Model

848A

Package

848A

is

The Model signed to fit a standard units of space. The Model

x

19" wide

x

7"

enclosed within a metal case de-

19"

rack and occupies two rack

848A

measures 3.47"

deep and weighs

6

pounds.

high

Model DC848 Package The Model DC848

is

enclosed within a metal case de- signed to fit in a standard 19" rack and occupies one rack unit of space. It

is

1.75"

high

x

19" wide x 10"

deep, and weighs 2.2 pounds.

Bottom row BAL/1 Conference Line

1

balance BAL/2 Conference Line 2 balance SIDETONE Headset Sidetone Level

Adjustment

DIM Speaker Attenuation during

Mic on

MIC Microphone gain

adjustment

1.1.6

Power

Model Each Model

to operate.

848.4

Power

848A

requires 12 volts ac at 1.4 amperes

This

power

is

supplied by an RTS Systems Remote Power Supply--included with each unit. The power supply comes in two types, one

is

whose mains input second type whose mains input

117 volts/50-60 hertz ac, or a

is

2U)

volts/50-60

hertz ac. Model DC848 Power The Model DC848 requires 12 volts ac at

0.5

amp-

eres, and comes with its own RTS Systems Power

848A

Supply Unit normally identical to the

supply.

Page

1-3

TECHNICAL

MANUAL

Model

1.2

SPECIFICATIONS

12.1

MODEL 848A MATRIX INTERCOM SYSTEM SPECIFICATIONS

Bus Complement

24

balanced distributed talk/listen buses

1

balanced distributed all talk bus

2

TW

Intercom 2-wire buses

Audio Level/Bus Impedance

Distributed Summine Buses

-10

dBu,

test level

-20

dBu,

nominal level

TW

Intercom Lines

dBu,

test level

0

-10

dBu,

nominal speech

Station Bridging Impedance

848A

Matrix Intercom Station/Model DC848 Data Concentrator

.

500

ohms

500

ohms

200

ohms

200

ohms

Distributed Summing Buses

TW

Intercom Lines

Distributed Summing Bus Termination

(One termination per system bus

Termination plugs may

Up to 8 stations

Up to 16 stations

Over 16 stations

Recommended Maximum System Size

Number of stations

(bus level lowered by

4

Stations per bus

(same listen channel)

Operating Distance

balanced-pair cable,

#22

gauge wire

be

with

is

usually required.

ordered from RTS Systems.)

3

dB)

12

kilohms, nominal

6

kilohms, LISTEN selected

10 kilohms, nominal

680

ohms (RTS Systems

1500

ohms (RTS Systems Part Number 9020-5189-02)

No termination

5,000

feet

Part

Number 9020-5189-01)

Page

14

TECHNICAL

MANUAL

Model

1.2.2

MODEL 848A INTERCOM STATION SPECIFICATIONS

Microphone Preamplifier

Input Input Impedance

Source Impedance

Maximum

Voltage Limiter Range

Frequency Response Output (rear panel access)

(load impedance 10K ohm)

Headset Microphone

sensitivity required

Headset Microphone

Source Impedance Range

Headphone Amplifier

Input Level

Gain

848A

Matrix Intercom Station/Model

Switchable, panel or headset Mic

500

ohms/dynamic Mic

800

ohms/lO milliamperes max carbon Mic

200

ohms, nominal

150

millivolts

50

dB, nominal, adjustable 30dB 100 hertz to 10 kilohertz,

-10 dBu, test level

-21

dBu, nominal speech level

-50

dBu minimum

100 to 1000 ohms

BC848

f

Data Concentrator

3

dB

Output Power

Frequency Response

Headphone Impedance Range

Loudspeaker Amplifier

Output Power

into

8

ohm speaker

Dim

Range

(dim

when Mic on)

Frequency Response

User Adjustable Level Trimpots

Listen Bus (1

All

talk listen

TW

Intercom Channel 1 listen

TW

Intercom Channel 2 listen

Sidetone (only in headphone)

Program input

of

24

system buses)

1

watt into 8 ohms

300

milliwatts into

150

hertz to 8 kilohertz, 23 dB

25

to

600

ohms

2

watts into 8 ohms

3

dB to

20

dB, adjustable

150

hertz to 8 kilohertz,

(Continued)

32

ohms

3

dB

Page 1-5

TECHNICAL MANUAL

Model

1.2.2

MODEL 848A INTERCOM STATION SPECIFICATIONS

Auxiliary Connections

External Headset

External Panel Microphone External Electret Panel Mic External Microphone On--Off Unswitched Mic Output Program Input

Power

And

Mechanical

848A

Power Requirements

Power Supply Module

Power Requirements from Mains:

Dimensions

@-I0

84814

Matrix Intercom Station/Model DC848 Data Concentrator

@-lo dBu

dBu,

10K

ohms

12

volts ac / 1.4 amperes / 45-440 hertz

25

volt-amperes, typical

30

volt-amperes, maximum

250

volt-amperes surge,

(Continued)

25

milliseconds

6

Weight

Finish

Front Panel Rear Housing

Connector Requirements

Matrix Intercom;

Audio Line Connector Line Cable

TW

Intercom;

Audio Line Connector

Line Cable

Serial Data Connector Serial Data Loop-Through

Headset Connector

Dynamic Mic XLR-type, 5-pin female Carbon Mic

Power Supply 4pin circular

Type

pounds,

Enamel Paint, light gray Gold Iridite

50-Pin Microribbon male

25-Twisted Pair, unshielded, or 50-Conductor Flat Ribbon Cable

XLR

type, 3-pin female

Belden

equivalent

9

+"

8723

"D"

pin "D" female

phone jack, 3 circuit

2.75

twin

male

kilograms

pair or

Page 1-6

TECHNICAL

MANUAL

Model

1.23

MODEL DC848 DATA CONCENTRATOR SPECIFICATIONS Connections Connection to Terminal or Modem: 5101:

Terminal Mode DEC VTlOO or equivalent. Settings:

Modem Mode Remote terminal to emulate DEC VTlOO or equivalent.

Settings:

selected, 8 bits, 1 start bit, 1 stop bit,

Connection to string

Parameters RS485 half duplex serial communication network

78.6 kilobaud, 8 bits,

Power And Mechanical

%00

9600/4800/2400/1200/600/300

84814

Matrix Intercom Station/Model

RS232

baud, 8 bits, 1 start bit, 1 stop bit, no parity.

baud,

software

no

parity.

of

Model 848A stations: 5102/5103: RS422,

1

start, 1 stop bit.

DC&Q8

Data Concentrator

Power Requirements Power Supply Module

Power Requirements from Mains: 10 volt-amperes, typical

Dimensions

Weight 2.2

Finish

Front panel Rear Housing

NOTE:

All

12 volts ac

pounds,

Enamel Paint, light grey gold iridite

0 dBu 0 dBm

product information and specifications are subject to change without notice.

=

0.775 volts r.m.s.

=

1

milliwatt

/

0.15 amperes 145-440 hertz.

15

volt-amperes, maximum

50

volt-amperes surge,

1

kilogram

25

milliseconds

Page 1-7

Model

TECHNICAL MANUAL

84814

Matrix Intercom Station/Model DC848 Data Concentrator

Model

Figure

848A

Page

2-1

Rear

1-8

Panel

Model 848A

TECHNICAL MANUAL

Ma&

Intercom Station / Model DC848 Data Concentrator

SECTION

2.1

INSTALLATION PROCEDURE

2:

INSTALLATION

connectors on the back of the Model are labeled JlOOl and 51002, and wired parallel. The the Model

data

DC848

connectors on the back of

are

labeled J102 and 5103,

848A

in

Page

2-

1

TECHNICAL MANUAL

Model

848A

Matrix

Intercom Station / Model

Table

2-1

DC848 Data

Concentrator

Matrix Audio Cables, Splitters, and Termination Plugs Required

Page

2-2

TECHNICAL MANUAL

Model 848A

Conference Audio Cables, Splitters, and Termination Plugs Required

Matrix

Intercom Station /Model DC848 Data Concentrator

Table

2-3

Page

2-4

TECHNICAL MANUAL

Model

848A

Matrix

Intercom Station 1 Model DC848 Data Concentrator

Table

2-4

Location versus Address Assignment and Cabling Log

Page

2-5

Model 848A

TECHNICAL MANUAL

Matrix

Intercom Station / Model DC848

Table

2-5

Station Select

Dip

Logical

Switch Setting Chart

Address:

Data

Concentrator

Page

2-6

TECHNICAL MANUAL

Model 848A

2.2

MECHANICAL INSTALLATION

The Mode1 848A mounts in an EIA standard 19-inch equipment Allow room for the panel microphone and controls in front and the cabling in the rear. There are no ventilation requirements.

The Model DC848 Data Concentrator mounts in an EIA standard 19 inch equipment rack, and, high. Allow room for cabling in the rear. There are no ventilation requirements.

2.3

2.3.1

Power transformer. The 14 volt connects to a a four pin circular connector (plug). This connector plugs in to a mating four pin circular power input connector (receptacle) rear panel. Tighten the retaining ring on the four pin circular plug.

A

single 2 ampere slow-blow fuse, F701, is located on

the 848A rear panel. Replace only with a 2 ampere

slow-blow fuse. Metric fuses can carrier 2802-0006-00 (Schurter

rack/enclosure, and is two rack units high.

ELECTRICAL

Power

is

supplied to the Model 848A via a step down

ac

is

changed

to

an

RTS Systems part number:

FEK

Matrix

Intercom Station /Model DC848 Data Concentrator

is

one rack unit

output of the transformer

,

J702, on the Model 848A

be

used when the fuse

031.1663).

and 51002, and the two connectors on the rear of the

DC848, J102 and 5103.Interconnect the data

connectors of the Model 848A's using RS422 9-pin

data cables. Connect one of the Model 848A

stations on the end to the Model DC848. The data connectors on the back of the Model 848A are labeled JlOOl and J1002, and wired in parallel. The data connectors on the back of the Model DC848

labeled 5102 and 5103, and also wired in parallel.

(See System Block Diagmm on page ix).

In

some installations it will

to complete the string of digital cables. System Diyital Connections. DC848 to Terminal or

Personal Com~uter Use a standard RS232 cable to connect the DC848 to a

terminal. Use a null modem RS232 cable to connect the DC848 plugging into the DC848A is a 25 pin female DB25 connector. The mating connector on the DC848 is 5101, a male DB25 connector. The type of connector on the end of the cable plugging into the terminal or personal computer is determined by the terminal or personal computer. Qn the follows:

Pin2.

Pin Pin 7 Shell

to

a personal computer. The end of the cable

...........

3

............

...:........

be

necessary to use a splitter

DC848 end the connections are as

Ax .Tx .Gnd .Shield

are

23.2

Signal

2.3.2.1

Svstem Audio Connection The 25 pair audio cables from the 848A

interconnected in parallel to form 25 balanced audio

buses. Connect the cables in parallel by using Model 4025A 1 5401 on each 848A to a splitter assembly. Splitter assemblies are interconnected with the male on one splitter to (See Figure 1-1, System Block Diagram on page ix). termination plug is sometimes required (explained below).

Svstem Digital Connections. 848A to 848A to DC848

System digital connections are required when a The Model 848A Model DC848 is used in the system. The system back panel, which sets the listen bus. digital connections are paralleled RS422 cables. These cables may connected by looping through on the two connectors on the rear of the 848A, 51001,

System Audio and Digital Connections Conference Line

X

5 Splitter Assemblies. A cable is run from

25

pair

a

female on another splitter.

cables from

in

the system

See Section 2.4 for further details

(TW)

Connection

TW

The Model 848A provides two conference-line channels. To

are

connect, simply insert a 3-pin XLR type male connector from the

back panel of the Model 848A. However, this input

will not power Intercom System Manual for details on how to install and use a

A

23.2.2

23.2.2.1

Back Panel Jum~ers

On the Model 848A, it is not necessary to use the back panel programming section to inhibit

Page 2-7

connector on the back panel of the

TW

Intercom line into the 5602 input on the

a

TW

Intercom system. Consult the

TW

Intercom System.

Listen Bus & Logical Address Selection

Listen Bus Selection (Audio)

has

a Listen Bus Selection area on the

a

station from

TW

Model 848A

TECHNICAL MANUAL

Matrix

Intercom Station /Model DC848 Data Concentrator

calling other stations as was necessary on the Model MS.

The Model 848A must be assigned its own station listen bus by using jumpers. One of these jumpers connects a pin in row C to the corresponding pin in row D; the other jumper connects a pin in row E to the corresponding pin in row

24

one of the electronics of that unit.

The pushbutton on the front panel corresponding to the

listen address must now be designated accented with a colored filter. This key represents its

own station

The position of this key must correspond to the listen

address selected by the jumpers on the rear panel.

23.2.23

Dir, Switch Setting Step 1: After setting the Station Listen bus on the

panel, open the cover to access the internal dip switch.

Step 2: Using the dip switch settings given in Table 25, set DIP SWITCH on the rear panel and designated as a "call answer"

pushbutton on the front panel (see above).

23.2.3

Logical Address Selection (Digital)

System Termination Plugs

balanced listen buses to the listen

call

and can

SlOl to correspond to the address set

F.

Pins CD and

be

used for auto call answering.

EF

connect

"call answer" and

rear

terminate J602 on the back panel, with termination plug

RTS

P/N

9020-5 188-00.

23.2.4

Auxiliary Connections The auxiliary connections on the back panel of the

Model 848A provide the user with a program input, an unswitched microphone preamplifier output and access to front panel connections. The program input accepts a

-10dBu signal which is distributed to both the loudspeaker and the headsets. The level can on the adjustment card.

The unswitched microphone preamplifier output provides a -10

848A microphone.

Using a standard Molex

(supplied in your package), auxiliary connections provide additional connections for the panel microphone and the various headsets. A remote microphone switch, such set up in this way.

m

Installing Additional Features

dBu line level signal from the Model

KK,

0.156 center connector

as

a footswitch, can be also be

Auxiliaw Connector

Pin Numbe~

Description

be

adjusted

Matrix Lines and All Talk Bus

The matrix lines and the balanced all-talk bus should have an impedance between 500 and 600 ohms for

A

proper operation. terminations should be plugged into the system line at one location only. This termination plug is not provided with the Model Systems.

For two to eight stations, the terminator has twenty-five 680 ohm resistors (RTS P/N 9020-5189-01). For nine to sixteen stations, the required terminator has twenty- five 1500 ohm resistors (RTS P/N 9020-5189-02). For seventeen or more stations no resistive termination is

required.

TW

Connector Termination

Each

TW

System line must be terminated with 200 ohms. If the the termination is provided by the RTS Systems' power

supply. If the

TW

termination plug with 25 resistive

848A, but may be ordered from RTS

line is used with an RTS

TW

input connections are not used,

TW

System,

Not connected PGM program input high PGM program input low Unswitched Mic preamp output high Unswitched Mic preamp output low Mic switch ground Mic switch (low=on) EPM LOW Electret Panel Mic input low EPM

HI

DPM LO Dynamic Panel Mic input low DPM HDM LO Dynamic Headset Mic input low HDM

HP

Electret Panel Mic input high

HI

Dynamic Panel Mic input high

HI

Dynamic Headset Mic input high

LO Headphone output low

HI

Headphone output high

Page 2-8

TECHNICAL

MANUAL

Model 848A

Remote Micro~hone Switching

There are two ways Through the rear panel Mic switch, or via a phantom connection through the dynamic headset connector.

Rear Panel Microphone Switch:

A

remote footswitch or other

connected to the auxiliary connector through pins 6 and

7.

When the switch is closed the microphone signal is

turned on and the front panel tally (in the Mic ON pushbutton) will illuminate Note that the front panel pushbutton may override the remote switch and

to

switch a remote microphone:

lock

on the microphone switches.

Matrix

Intercom Station / Model DC848 Data Concentrator

dry

contact may

to

its bright (active) state.

be

Remote Microphone Switch Through the Dynamic Headset Connector:

The microphone-on function may be remote-controlled by connecting a 4.7 kilohm resistor from each side of the dynamic microphone transformer balanced input on

to

fiont panel, through a switch

the

Figure 2-2) This feature keeps noise from the

microphone pre-amplifier off the buses when the microphone is off. This feature also improves the

performance of large systems.

microphone termination input and add significant noise to the system, causing possible instability.

A

ground.

switch can short the

(See

MIC HI

MIC

LO

GROUND

HEADPHONE

figure

Remote Microphone Switch Through The Dynamic Headset Connector

2-2

SIGNAL

Page 2-9

TECHNICAL MANUAL

Model 848A Matrix Intercom Station /Model DC848 Data Concentrator

2.4

MODEL DC848 SERIAL FORMAT

The RS232C serial format for the Model DC848 Data

%00

Concentrator is: no parity.

A terminal must emulate DEC's (Digital Equipment Cor-

poration) VT100-type terminal for the proper escape se-

quences and control characters terminals may require a null modem adapter or gender change or both.

The Model DC848 directly into a terminal. Use a null modem adapter or null

modem type cable to plug into a computer.

Pin 2 Rx Pin 3 Tx Pin 7 Gnd

Shell Shield

2.5

FACTORY CONFIGURATION

Each DC848/848A System leaves the factory in this con- figuration: programmed for inhibit, which will disable the 848A front panel buttons from responding the switch.'"Hands Free Answer" and "Instant Mic" disabled. The tally flash time is set for 40 seconds.

There are not forced latch disabled switches and no group assignments. The Security Password is factory set at

2.6 for details on Computer Programming Functions.)

2.5.1

AU

Installing CPU Board

baud, 8 bits, 1 start bit, 1 stop bit,

used

by the DC848. Some

is

RS232 configured as

undesignated 84844 station addresses

if

there is no designation in

talk

paths, no inhibited

OOOOOOO.

DCE

to plug

talk

paths, no

(See Section

Jumpers

m

2.6

COMPUTER PROGRAMMING FUNCTIONS

Enhanced operating functions (explainedbelow) are avail-

to

able DC848 Data Concentrator, associated connecting cables, and a customer furnished DEC VTlOO terminal or equivalent. A personal computer with VTlOO emulating software may be used instead of a VTlOO terminal. The terminal or computer is plugged into the DC848.

The enhanced operating functions keying in commands to the system via the terminal or computer ("programming"). When keying in commands

via

a command unless stated on the screen. Pressing "escape" will return the display back to the previous menu or to the Main

The numbers associated with a panel are keyed in as two digit numbers (for example, 01, 02,23, number combination in the case of the Intercom Lines (for example, T1 or L2). The "return" or "enter" key is not required to enter the number. The numbers associated with commands ample, 1,2,5,6. The "return" or "enter" key is not required to enter the number.

2.6.1

ForcedDnhibited Crosspoints (ForceIInhibit A Talk Path) The forced/inhibited crosspoints function forces or in-

hibits a fixed combination of buttons can Once programmed, the fixed parameters of the cannot inhibited until reprogrammed at the local terminal or per- sonal computer.

a Model 848A system which includes a Model

are

implemented by

the menus, it is not necessary to hit "return" to execute

Menu.

24),

or a letter-

are

keyed in as single digit numbers, for ex-

Explanation of Functions

talk

path between 84814 stations. Any one or

be

locked in or locked out.

talk

path

be

cleared at the panel and will remain forced or

To enable certain functions of the DC848, the following

jumpers (or switches) must be activated on the

CPU Board prior to installation:

J1,Pins 7 or S1, switches 6

J1, Pins or S1, switch 8:

Seepage7-36 for location of J1, orpage7-36Afor location of S1.

Note: S 1-1 through S 1-5 are not used and should be left the OFF position.

9

&

8

10

&

7:

Enables DC848

modem operation

Enables the password function

Page

Rafch

The Panel Switch Action function can change the action of selected buttons from momentarvlalternate to momen-

tary

only, disabling any latching action. ~ands-~ree Answer (Automatic Reciprocal) The Hands-Free Answer function can set

to respond automatically to other selected 848A stiltions, leaving a user's hands free. When the programmed station calls, the

At the called station, Hands Free Answer indicates an established

in

inadvertent "eavesdropping" in case the visual connection signal (brightly lit button) is unnoticed.

2-

10

talk

path

talk

is

instantly established.

path

with a beep.

an

This

beep prevents

ill

848A station

RTS 848A, DC848 Technical Manual

Specifications and Main Features

Frequently Asked Questions

User Manual