Philips LBB 1330, Instructions For Use Manual

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5. SM40 MODULES
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5
KSP’s may also be used for loudspeaker zone pre-selection in Master Call Stations. A Master Call Station
(MCS) consists of an activation section, and a pre-selection section containing a maximum of 90 Keys.
The activation section is made up from a Key Sensing PCB, and a Microphone Amplifier PCB. The KSP’s
keys are here used as 5 Chime selection keys (numbered 1 to 5); 4 Priority/Talk keys (numbered 6 to 9); and
1 Reset key (number 10). The MAP part of the activation section allows for connection of a microphone;
a VU meter; headphones; key- and handset cradle switches; and “Talk/Busy” LEDs.
The Chime keys may be pre-programmed with the chime tones which are desired to precede a call, and the
Priority/Talk keys with the required priorities.
The option exists, within the Installer Programming Menu, to combine the chime/alarm keys and
Priority/Talk keys (this is the most used application for MCSs). This means that 9 keys can be programmed
as such: Chime/ Alarm/ Message/ Priority and Activate. (see chapter 11 for a list of tones).
The pre-selection section of the MCS consists of up to 9 Key Sensing PCBs (called ‘Key Sets’ in Installer
Program ‘C’, and ‘Selection Stations’ in Program ‘5’). These are connected to the Microphone Amplifier
PCB of the activation section, and to Input Cards inputs 5 to 8.
The operator first presses:
a) a number of selection keys (each key is software programmed to route the call to 1 or more zones);
b) a “Chime” key to select a chime or attention tone; then
c) a “Priority/Talk” key to execute the call.
The Talk/Busy LEDs operate in the same way as a standard call station.
If a call has been cancelled, or has not taken place, because of a priority conflict, the selection keys will
remain in their “selected” mode, ready for the call to be attempted again. When the call has been
successfully made, the selected keys will automatically be cancelled (reset).
Individual keys may be reset by pushing the key again. The total key selection may be cancelled by pushing
the “Reset” key on the Activation Section.
As the example at the left shows, the KSP of the Activation section must be connected to one of the inputs
of Input Card 1, and the remaining KSP’s to Input Cards 5 to 8.
It is possible to use illuminated switches, or LED indicators, to show which keys are currently active.
A Key Confirmation PCB (KCP) is available to activate these indicators. A maximum of 4 KCP’s can be
used in an SM40 system, each KCP capable of controlling up to 90 indicators. Because of the amount of
power used by the indicator lamps, a separate power supply should be used. A jumper (S3) on the PCB
allows selection of either 5 V or 15 V supply. The maximum distance between the SM40 system and a KCP
is 200 m. The maximum d.c current per indicator is 500 mA and the maximum d.c voltage per indicator is
50 Volt.
Each KCP includes two jumpers (S1 & S2) used for setting the address so that it corresponds with the
Master Call Stations address.
KCP’s will only operate if the system’s Central Processor is fitted with a Communications PCB (CMP) or an
I/O PCB (see Chapter 5.13).