2 Installation
digital
Revision C • 1/04
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2-7
WIRE PREPARATION
All BMX
digital audio and logic wiring termi-
nates in AMP MOD IV receptacle contacts at the
console. Stranded wire of 22 to 26 AWG, with in-
sulation diameters of .040 to .060 inch, can be
used with the AMP MOD IV receptacle contacts.
Follow these steps for audio wire preparation:
1
Strip the cable insulation jacket and foil shield
back 1½" [38.10 mm].
2
Remove the foil shield and sleeve the drain
wire with 20 AWG Teflon sleeving. Leave
9/64" [3.57 mm] of the drain wire exposed.
3
Cover the cut end of the jacket with 3/4"
[19.05 mm] of heat-shrink tubing. Shrink this
tubing, centered on the jacket cut end, to hold
the drain wire sleeving in place.
4
Strip the signal wire insulation back 9/64"
[3.57 mm].
5
Crimp the receptacle contact onto the wire
and insulation.
A
A
A
A
Audio C
udio C
udio C
udio C
udio Cable S
able S
able S
able S
able Shielding N
hielding N
hielding N
hielding N
hielding Not
ot
ot
ot
ote:
e:
e:
e:
e:
To follow recom-
mended grounding procedures, the drain wires
must be sleeved with Teflon sleeving and heat
shrink tubing must cover all cable jacket cut ends
to insulate the shield wiring.
Cabling and Wiring
Before installing the console, draw up a facility
wiring plan that lists the console interconnections
with all peripheral devices. Identify and create tags
for all audio and logic cabling. List each connec-
tion in a master facility wiring logbook to facili-
tate wiring installation, future system wiring
changes, equipment updates, and system trouble-
shooting.
Refer to the module Quick Connection Guides,
on pages 2-16 to 2-57, for information on each
audio and logic connection (including block dia-
grams for each logic interface connector) and on
each module’s setup DIP switches.
REQUIRED CABLES AND WIRE
The BMX
digital uses the following types of
cables and wires:
• Analog audio connections require two-
conductor, stranded, insulated, foil-shield
cable using a separate shield drain wire
(equivalent to Belden 8451, 9451 or 8761).
• AES/EBU connections require 110 ohm
two-conductor, stranded, insulated, foil-
shield cable containing a separate shield
drain wire (equivalent to Belden 1800A).
• Logic control cables require stranded, 22
AWG, multiple-conductor, non-shielded,
jacketed cable (equivalent to Belden 9423,
8457 or 9421). The number of conductors
used is determined by the application. Typi-
cally cables with five and eight wires are
most often used for constructing logic
cables. Even though there are eighteen dis-
tinct signals on the Logic Interface connec-
tor, only a handful are typically used for
any given application.
AMP MOD IV Receptacle Contacts
9/64” [3.57 mm]
Insulation Barrel
Properly
Crimped Contact
Wire Barrel
