Bell Intercom System BSX User Manual
3
Installation Procedure
Fitting the Control Unit
All of the equipment within the control unit box is mounted on a removable plate. It is important
that while the box is being drilled for cable-entry conduits and being secured to the wall that the
equipment is removed to prevent metal swarf from falling onto PCBs.
that while the box is being drilled for cable-entry conduits and being secured to the wall that the
equipment is removed to prevent metal swarf from falling onto PCBs.
Cable Requirements
Use 0.5mm solid-core twisted-pair telephone cable (BT specification CW1308, or equivalent)
for all telephone and door panel connections; this is essential for correct operation of the
system and for compliance with European EMC Directive 89/336/EEC. Avoid running any cables
alongside mains or other data transmission wiring.
for all telephone and door panel connections; this is essential for correct operation of the
system and for compliance with European EMC Directive 89/336/EEC. Avoid running any cables
alongside mains or other data transmission wiring.
Connections to each Door Controller
(CTX PCB)
(CTX PCB)
Cores
Diameter
Max.Length
Speech Unit (Door panel)
5
0.5mm
50m
Lock release
(0.5A rating)
(0.5A rating)
2
0.5mm
1.0mm
1.0mm
25m
100m
100m
Exit / Fireman’s Switch or Door Open Switch
2
0.5mm
100m
Tone Output/Sounder
2
0.5mm
100m
Engage Lamp
2
0.5mm
100m
Connections to Push-buttons - as per diagrams
Connections to Telephones (full isolation)
500D Telephone
5
0.5mm
100m*
500X Telephone
6
0.5mm
100m*
500LX/500LXT Telephone
7
0.5mm
100m*
These restrictions are unlikely to be exceeded in most circumstances; if they present a problem
please contact the Manufacturer for further advice.
please contact the Manufacturer for further advice.