Input Card - Ipc - Philips SM40 Instructions For Use Manual

5. SM40 MODULES
5.3

Input Card - IPC

Eurocard 10 x 22 cm with an 'a b' connector (2 x 32). Inputs for 4 Call Stations, supplying phantom
power and user key detection. There are 4 outputs and a connection to the communication line of
the SM40.
Controlled and monitored by the central processor, each Input Card (IPC) LBB1351 interfaces 4 Call
Stations (CST)s with the SM40 Public Address Distribution Centre.
The SM40 Centre will accept a maximum of 8 Input Cards.
By coupling Input Cards, Call Stations can be extended to accept up to 50 User Keys. This is accomplished
in the Installer programming mode, using key C on the Display and Keyboard. The extra User Keys (Key
Sensing PCB (KSP)) are connected to IPC 5, 6 7 or 8 for Call station CST1 to CST4.
The Key-Sensing PCB (KSP) can also be used without the 'Call' facility, to activate e.g. alarm tones.
Depending on the configuration these are connected to IPC 5 -8, and are called Alarm Stations (ASTs).
Each Input Card has 4 audio inputs and outputs, and provides each Call Station with (phantom) powering,
and user key detection.
The phantom powering also powers red "busy" and green "call" LEDs, mounted on the Microphone Call
Stations, a circuit built into the IPC causes the green LED to flash when in the "wait" mode (during
attention signal).
The user key detection circuit informs the Central Processor Card (CPC) which user key on which call
station is being pressed.
In order for the Central Processor to "recognise" an Input Card, each unit is given an "address". This address
setting is accomplished by positioning a jumper on the IPC card.
In line with Philips' commitment to reliability and ease of service, the following features have been built in
to the unit:
If an input is short circuited the other inputs will not be effected.
A yellow LED on the front edge of the card advises that the Input Card (IPC) is in communication with
the Central Processor Card (CPC).
3 green LEDs indicate that adequate supply voltage is present.
Four screwdriver potentiometers, mounted on the card, allow attenuation of each channel to be preset.
Note: These potentiometers should normally be placed in their maximum position and should only be
changed in situations where full power, using the relevant call station, is not required from the system.
LBB 1351
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