Installation

INSTALLATION OF POWER SUPPLY
A regulated 13.8V dc power supply is required to power the system.
For systems using a Master, it is imperative that a LINEAR regulated supply be used, as
SWITCH MODE regulated supplies will cause interference with AM radio reception.
NOTE: - Since some linear supplies also generate interference, it is recommended that
only power supplies recommended by a Valet Dealer be used.
- See sections "LOCATION OF EQUIPMENT" and "WHAT CABLE TO USE" for
important details on power supply location and cabling.
POWER SUPPLY CURRENT RATING
It is important to use a power supply with a current rating sufficient for the size of the system.
The power supply current rating is determined by the peak current requirement of the system
as a whole and can be calculated by adding the peak current requirement of each of the
stations making up the system.
The table on the right shows the current
consumption for each of the individual
components.
The following calculation example is for
a system made up of a Music Master,
6 Rooms and 1 Door.
1 x 0.45A for the Master = 0.45A
6 x 0.15A for six rooms = 0.9A
1 x 0.15A for the door = 0.15A
Total = 0.45A + 0.9A + 0.15A = 1.5A
System One Item Current
Master Station – Music 0.45A
Master Station – Secure 0.5A
Room Station 0.15A
Door Station 0.15A
Auxiliary Input Jack 0.1A
External Siren 1A
External Strobe 0.1A
The above system requires a 13.8Vdc linear regulated supply rated at 1.5 amp or better.
CONNECTION TO A MASTER SYSTEM
For a system fitted with a Master Station, the power supply is to be connected to the
Master Station.
The Master Station has a dedicated pair of terminals labelled "13.8V I-P" on the
termination PCB for the connection of the power supply.
Because a DC power supply is used, it is important that the positive lead of the power
supply connects to the POS terminal and the negative lead of the power supply connects
to the NEG terminal.
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