5. Power Supply and Battery Backup
Power supply and rechargeable battery backup together with a battery charger are mounted on the PCB. Power supply is driven by main power (220ac) and a three terminal power socket is mounted on the edge of the PCB. The charger keeps the batteries fully prepared for any failure in main power, thus providing an uninterrupted service of RIVD. RIVD can be operated without main power but with the supplement of a suitable power source within the given specification. The power supply that is mounted on the PCB should properly be shielded to avoid any disturbance to RIVD either in electrical or magnetic form.
Power
Supply
·
Input voltage
150 240 VAC @ 48 to 52 Hz
·
Output Voltage
+5VDC @ 1.0A
·
Input connector
Terminal Block plug (3 pins)
·
Output Connector 3.5mm male jack
·
Fuse
1.250A @ 250V
·
Minimum load
all outputs at 10% of rated load
·
Size
(2.80)Lx(1.25)Wx(1.25)H
·
Weight
0.7lbs(max.)
·
MTBF>150khrs.
Rechargeable
Battery
AA
size, 4x1.2v Ni-Cad batteries with a capacity of 2.5Ah are used and can be
connected either internally or externally.
Battery
Charger
Charger
supply is also derived from the same power supply used for RIVD and therefore
meets the same specifications.