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8.5 LOGIC INTERFACES
PR&E recommends the use of logic interface electronics between the console and any piece of auxiliary
equipment to protect the console from hazardous voltages, and to prevent ground loops, such as those
which occur when control circuitry is referenced to a different ground or power supply.
A variety of different interfaces is manufactured by PR&E to accommodate most types of cart, tape and
cassette machines, turntables, and compact disc players. Cable assemblies connecting the console to the
interface, and the interface to the auxiliary equipment are also produced by PR&E. For complete interface
information, including all standard machine cable assemblies and machine "Y" cables, contact PR&E.
The table below provides a listing of the various interfaces described in this section, as well as their part
numbers and a general description of their use.
Interface
PR&E P/N
TCI-2A
99-165
CI-2
99-125-0
CI-2 (5V)
99-125-1
TI-2
99-111
TT-3
99-110
WL-2
99-143
Dual Relay
99-419
Cassette
99-410
Skimmer
Section 8.6 contains schematics of these interfaces, and diagrams of the three console to interface cables:
PR&E #99-464 (for use with the TI-2 Tape Interface); PR&E #99-465 (for use with the CI-2 Cart Interface
when interfacing Studer A725, A727 and A730 compact disc players); and PR&E #99-38 (for use with
all other interfaces). It also contains diagrams of the 9-, 12- and 24-pin control cables (PR&E #99-453, #99-
454 and #99-455, respectively), which are used when connecting to a cart, tape or cassette recorder "Y"
cable.
While there are three console to interface cables, there is a variety of interface to machine cables, each with
a configuration dependent upon the individual machine being connected. When a machine "Y" cable is
used in an installation, only the "Y" cable (not the control cables) is machine dependent. Figure 8.5 (on the
following page) provides an overview of the logic interface and cable system.
PACIFIC RESEARCH & ENGINEERING
PR&E TOMCAT, Micromax cart machines
Cart machines, CD players and cassette machines w/12-28 V lamp tallies
Cart machines, CD players and cassette machines w/5 V lamp tallies
Reel to reel tape machines w/12-28 V lamp tallies
Turntables
Studio and Control Room warning lights
General purpose switching, mute contacts
Cassette recorders
207
BMX SERIES III CONSOLE
For Use With
REVISION B
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