BT-1 Installation Guide v1.0
9
Connecting to an Extension Port (BT-1E only)
The BT-1E is connected in exactly the same manner as the BT-1F, except that it should be connected to an
EXTENSION
PORT
on the host unit.
Connect to SK1
Screened
Cat 5 cable
HOST UNIT (DCM1 illustrated)
100 m max
Connect to
EXTENSION PORT
BT-1
(UK version illustrated)
IMPORTANT:
Note that on the DCM1 and DCM1e Digital Control Zone Mixers, the four Extension Ports are alternative
input connectors for Line Inputs 1 to 4. When a BT-1E is connected to an Extension Port, the corresponding pair of Line Input
phono connectors must not be connected to a music source device of any kind.
The maximum total Cat 5 cable length should not exceed 100 m. If further modules are being “linked” together (see
“Connecting
a BT-1E to an LE-1 or BE-1” on page 10
), this figure applies to the overall cable run from the host unit to the “furthest”
module in the chain.
IMPORTANT:
Because the cables carry low-level audio,
only
screened Cat 5 should be used, the foil screen of the cable being
bonded to the metal screening can of the plugs. If a BT-1 is being installed in very close proximity to the host unit, it
may
be
possible to use ready-made screened Cat 5 “patch” cables of short length. In all other situations, shielded RJ45 plugs should be
crimped onto the installed screened Cat 5 cable using the pinout shown below:
PIN
USE
Cat 5 CORE
1
Left audio channel ‘cold’ phase (-)
White + Orange
2
Left audio channel ‘hot’ phase (+)
Orange
3
Model sense
White + Green
4
- Vsupply
Blue
5
0 V
White + Blue
6
- Vsupply
Green
7
Right audio channel ‘hot’ phase (+)
White + Brown
8
Right audio channel ‘cold’ phase (-)
Brown
SCN
GND ref for system music controls
Connector shell
On the DCM1 and DCM1e, the RJ45 Extension Ports are alternative input connectors for Line Inputs 1 to 4, and are NOT
associated exclusively with any of the eight Zones which the host unit supports. Use the Select Input option in the Music Menu
to assign the Line Input to which the BT-1 is connected to route the streamed audio to the Zone required. See page 28 of the
DCM1/DCM1e Installation and User Guide for full details.
