User's Manual

67
Document Number: 0100SM1401 Issue: 12-16
Power Supply Requirements
Operating Voltage: 11...30 Vdc (Dual Input)
Input Power (Rx typical): 14 Watts
Input Power (Tx typical): (See table below)
In high ambient temperature situations, the internal fans may operate, resulting in an increase of input power of up to 28
Watts.
Typical receive/standby input power is 14 Watts. The input power will vary in
transmit mode according to RF output power level.
The QB is supplied with a lock-in mating DC power connector
which should be installed with the locking screws done up tightly
(0.5 - 0.6 Nm / 4.42 - 5.31 ftin ). Replacement parts available from Schneider
Electric, part number TBUMPWR-PLUG-QB.
The radio is designed to limit damage if the voltage exceeds the operating voltage
or if reverse polarity is applied. The field replaceable internal fuse has a 12 Amp rating.
Replacement fuses available from Schneider Electric, part number TBUMPWR-FUSE-QB.
Connect and secure the antenna, Ethernet and serial connectors BEFORE applying power to the unit. Lastly, before inserting the
power connector, re-check that the polarity and voltage is correct using a multimeter and check the power cable against the +/-
label printed on the rear panel of the radio.
Tx Power (dBm)
Typical Input
Power (Watts)
QB150 QB450
30 26 34
37 38 46
40 46 59
Part F – Quick Reference Guide
NOTICE
HAZARD OF EQUIPMENT DAMAGE
The radio modem can be damaged if there is any potential difference between
the chassis-ground, RS232 signal ground, power (-) input, or antenna coaxial
shield. Before connecting any wiring, ensure that all components are earthed to a
common ground point.
Failure to follow these instructions can result in equipment damage.