Bell System _BSTL_ BS LX Intercom Handset Data Sheet BSTL

User Manual: Bell System _BSTL_ BS-LX Intercom Handset Data Sheet

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Page Count: 5

Bell System (BSTL) BS-LX

Terminals

I Call

R Speech Out (Mic)

O Common

T Speech In (Speaker)

Z Lock

V + 12VDC

L Door Contact

IMPORTANT NOTE :

1) Before replacing the handset make note of the wires to each terminal on the existing unit (an easy way

is to cut each core off leaving a piece of the insulation in place with colour visible) twist unused cores

together (so you know they are not used, do not short them out).

2) Some older systems will have cable with one coloured core and a solid white core in this case mark

each core with a marker or tape.

3) Some systems may have loop on wiring

, you will have 2 cables into your handset (make sure any joins

remain, as these may be serving other flats on the system).

© 2010 www.intercomsrus.com

Setting Handset Up

Wiring Diagram

Single Entrance DC Call

Wiring Diagram

2 Entrance DC call with 59S Switcher

Wiring Diagram

2 Entrance System DC Call (M719S Switcher)