PROTECH
MODELS COVERED
655B
®
1/06
REED RELAY SWITCHER CARD
INSTALLATION & OPERATION MANUAL
INTEGRA III SYSTEM
Model 655B Shown
www.protechaudio.com
The Model 655B Reed Relay Switcher Card is
designed to operate as a remote switching control in
professional audio systems.
Typical applications a r e public address systems,
broadcast studios, sales presentation rooms, headphone listening systems, multi-room audio systems,
and recording systems. The actual application of the
amplifiers is found in buildings such as airports,
factories, courthouses, casinos, convention centers,
libraries, hotels, racetracks, training systems, corporate boardrooms, etc.
The Model 655B incorporates 8 individual reed relays.
The relays are mounted on a single, plug-in printed
circuit board. Each relay has a Form A normally open
(SPST) contact arrangement. The relays are activated by grounding the control pin. Relay control pins
may be ganged together to operate more than one
relay from a single switch closure. Different combinations of relays may be created by isolating the remote
switch closures through diodes.
Reed relays are much faster operating than standard
electro-mechanical relays. The average switching time
for the reed relay is 1 millisecond. This fast operating
time makes them ideal devices for line level audio
applications. The relay cards are designed to operate
alone or in conjunction with other switching cards in
the INTEGRA III SYSTEM.
The Model 655B is designed to mount in the Model s
857B or 858B Card Frames. The unit may be mixed
or matched with other INTEGRA III SYSTEM cards to
create a complete audio system.
The card frames will allow mounting of either 9 audio
cards and plug-in power supply card (Model 858B), or
10 audio or switching cards when used with an
external power supply (Model 857B). If additional
information is needed, contact Applications Assistance by calling 631-584-5855.
The reed relay cards may be expected to provide
years of uninterrupted, quality service.
Protech Audio Corporation, PO Box 597, 192 Cedar River Road, Indian Lake, New York, 12842, Voice 518-648-6410 Fax 518-648-6395
INSTALLATION
The 655B Reed Relay Switching Card is designed to
be mounted in the Model 857B, or 858B Card Frame
Assembly.
The Model 857B Card Frame will accomodate up to 10
audio cards, and requires an external power supply (Model
66708).
The Model 858B Card Frame will accomodate up to
9 audio cards, and has a built-in power supply card
(Models 2000-PS-A).
Both card frames assemblies bus the DC power to the
individual card slots, and provide screw-type barrier termination points for audio and DC connections.
The determination as to which backplane assembly to use
in your project, was made prior to our factory receiving the
order. The backplane assembly you have received will
accomodate the group of cards you or your designer have
speciifed.
The actual steps necessary for installation of the 655B
Reed Relay card, are comparable to those necessary
for any of the INTEGRA III SYSTEM cards. They are as
follows:
1- Mount the card frame in an appropriate EIA 19" width
rack, using 4 screws of sufficient tensile strength to
provide secure mounting.
2- A determination has been made as to which type of
power supply will be used on your system. Follow the
instructions for the type of power supply you will be
installing.
4- Unpack each individual card, inspect for shipping
damage, and assuming none is found, slide the
card
half-way into the appropriate slot. After all cards have
been installed
card at a time and turn on the power supply. Make sure no
unusual loading is noticed at the power supply. If loading
is noticed, turn off the power supply, unplug the card and
recheck terminations. If no loading is noticed, continue
inserting each card in the card frame, checking power
supply loading as each card is plugged in. When all the
cards have been plugged in, the installation is complete,
and all that remains is the alignment.
half-way into the card frame, plug in one
ALIGNMENT
The Model 655B does not require alignment.
Operation of the card may be checked in the following
manner:
1- Apply a signal representative of the actual signal level
to be used, to contact K1, In (Pin #19).
2- While monitoring the output at pin K1 Out (Pin #11),
ground switch #1 (Pin #2). Check for proper signal level
at the output pin.
3- Repeat steps 1 & 2 for each switch channel on the
Model 655B.
This completes the installation and alignment of your
Model 655B Reed Relay Switching Card. The card(s) may
be expected to deliver years of uninterrupted service.
PROTECH AUDIO
857B & 858B BACKPLANE CONNECTIONS
GROUND RELAY SWITCH PINS TO ACTIVATE RELAYS
16
17
18
K1 IN
K2 IN
K3 IN
K4 IN
K5 IN
K6 IN
K7 IN
K8 IN
K5 OUT
K6 OUT
K7 OUT
K8 OUT
SPECIFICATIONS
19
20
21
22
23
24
25
26
27
28
29
30
®
INTEGRA III SYSTEM
CONNECTOR & PROGRAM DRAWING
MODEL 655B
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
K2 SWITCH
K1 SWITCH
GROUND
K3 SWITCH
K4 SWITCH
K5 SWITCH
K6 SWITCH
GROUND
K7 SWITCH
K8 SWITCH
K1 OUT
K2 OUT
GROUND
K4 OUT
K3 OUT
EXTERNAL POWER SUPPLY. If an external power
supply is to be used, terminate the proper supply
connections to pins 1, 2, & 3 of the DC connector,
as shown in the card frame layout drawing Turn on the
power supply, and using a DC voltmeter, check for
correct voltage and polarity at pins 1, 2, & 3 of of the DC
connector.
INTERNAL POWER SUPPLY. If a plug-in power supply
card is to be used, plug in the supply card, and check for
proper illumination of both plus and minus DC green
LED's.
3- Terminate all input, output, and switch connections,
using the card connection drawing on the facing page.
Shielded cable is recommended for all audio connections.
Note 1The alignment procedures for INTEGRA III SYSTEM
cards, differ from card type to card type. Therefore it is
necessary to consult the alignment procedure for each
type of card being installed, to properly align a card frame
using different card types.
Page 2
RELAY TYPE......................................................
CONTACT FORM...............................................
CONTACT RATING (SWITCHING)........................
CONTACT CARRY CURRENT...............................
POWER REQUIREMENTS..................................
RELAY ENABLE.................................................
SIZE.........................................................................
TEMPERATURE.................................................
Reed
1A
0.75 Amps DC
1.5 Amps
+18-24VDC At 48ma per card
External Switch to Ground
2.5"H x 8.0"D x 1.1"W
0-70 Degrees C
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