719S 2 Door Switching Unit
PD-008 Iss 6
Installation & Operation Manual
Page 8 of 20
Cable Requirements
Use standard 0.5mm solid core twisted-pair CAT5/CAT5e unshielded or CW1308
telephone cable for all connections unless otherwise specified.
Do not use stranded
alarm cable
. For optimum speech clarity a twisted-pair must be used for the 'R' and 'O'
connections to telephone and speech unit. Avoid running any cables alongside mains or
other transmission wiring.
The Total number of cores depends on the requirement for each telephone model as
shown in the table below. In all cases there is an individual call line for each phone,
while the remainder of the cores are common to all phones in the system. All telephone
models, except the BS-LX, may be wired either with an individual cable or by looping
from phone to phone.
Care must be taken with the BS-LX model to avoid voltage drop problems (due to LED
currents from mute and door status features). Refer to the tables on diagram 5 and
below before planning the cable layout for these models.
If in doubt please contact
your distributor or the manufacturer for further guidance.
Connection
No. of
cores
Max
Length
Conductor
Size
801,801S, 801P or 801PS
Phone
5
100m
0.5mm dia.
BS-LX Phone
7
See diagram 5
BS-LX (no door contact, no ’L’)
6
Power Supply
2
2m
1.0mm
2
Speech Unit
5
50m
0.5mm dia.
Lock Release (up to 0.5A)
2
25m
50m
0.5mm dia.
1.0mm
2
EXIT/Trades Button
(inc. Time Clock
2
100m
0.5mm dia.
Door Monitor Contact
2
See diagram 5 and 7
