Unit installation

719S 2 Door Switching Unit

CABLE REQUIREMENTS

Use standard 0.5mm solid core twisted-pair telephone cable for all telephone

connections unless otherwise specified (e.g.BT spec # CW1308). Do not use stranded

alarm cable. For optimum speech clarity a twisted-pair should 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 500X series, may be wired either with an individual cable or by

looping from phone to phone.

Care must be taken with 500X, 500PX, 500LX, 500PLX , 500LXT and 500PLXT models

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.

CONNECTIONS No.

CORES

MAX

LENGTH

CONDUCTOR

DIA.

Telephones:

801, 801S, 801P, 801PS

500A, 500D, 500PA, 500PD

100m

0.5mm

500X, 500PX

500LX, 500LXT

500PLX, 500PLXT

Refer to diagram 5

Power Supply 2 2m

0.5mm (1A PSU)

1.0mm (2A PSU)

Speech unit 5 50m 0.5mm

Lock Release (up to 0.5A) 2 25m

100m

0.5mm

1.0mm

EXIT/Trades Button

(inc. Time Clock)

2 100m 0.5mm

Door Monitor Switch. 2 Refer to diagram 5