Installing the Radio | 77
Aprisa SRi User Manual 1.1.0
Connecting the Power Supply
The nominal input voltage for a radio is +13.8 VDC (negative earth) with an input voltage range of +10 to
+30 VDC. The maximum power input is 25 W.
The power connector required is a Molex 2 pin female screw fitting part. This connector is supplied fitted
to the radio.
The negative supply of the Aprisa SRi power connection is internally connected to the Aprisa SRi enclosure.
Power must be supplied from a Negative Earthed power supply.
Wire your power source to power connector and plug the connector into the radio. The connector screws
can be fastened to secure the connector.
Spare Molex 2 pin female power connectors can be ordered from 4RF:
Part Number
Part Description
APST-CML2-FEM-01
4RF SR+ Spare, Connector, Molex 2 pin, Female, 1 item
Turn your power source on:
•
All the radio LEDs will flash orange for one second and then the OK, MODE and AUX LEDs will light
green, the TX and RX LEDs will flash red.
•
The Aprisa SRi radio is ready to operate
•
The TX and RX LEDs will be green (steady or flashing) when the radio is registered with the network.
If the LEDs fail to light, carefully check the supply polarity. If the power supply connections have been
accidentally reversed, internal fuses will have blown to protect the unit.
Spare fuses are contained within the radio, see
on page 321 for instructions on how to locate
and replace the fuses.
External Power Supplies
The following external power supplies are available from 4RF as accessories:
Part Number
Part Description
APSB-P230-030-24-TS
4RF SR+ Acc, PSU, 230 VAC, 30W, 24 VDC, -10 to +60C
APSB-P230-048-24-TE
4RF SR+ Acc, PSU, 230 VAC, 48W, 24 VDC, -20 to +75C
APSB-P230-060-24-TS
4RF SR+ Acc, PSU, 230 VAC, 60W, 24 VDC, -10 to +60C
APSB-P48D-050-24-TA
4RF SR+ Acc, PSU, 48 VDC, 50W, 24 VDC, 0 to +50C