User`s guide

Chapter 2 __________________________________________________________ Product Overview
VAISALA _______________________________________________________________________ 17
Power Supply and Connection Unit QMP202MP
MAWS201MP (see Figure 2 on page 15) is a low-power system.
When AC (mains) power (230 or 115 VAC) is available on the
installation site, an AC (mains) power supply is used to charge the
battery. QMP202MP includes the following modules: the backup
battery, the battery regulator, AC (mains) power supply units, and the
communication device. The unit is easily mounted under the radiation
shield.
Backup Battery
QMP202MP houses a sealed and maintenance-free 12 Ah battery. The
battery is charged with QBR101 Battery Regulator that is connected to
the AC (mains) power supply.
Battery Regulator QBR101
Battery Regulator QBR101 is a charging and supervising instrument
for 12/24 Volts lead acid and nickel-cadmium batteries. QBR101
allows input from AC (mains) power.
The maximum charging current can be set by the internal jumper
settings either 0.5 A, 1.0 A, 2.0 A, or 2.5 A. QBR101 is applicable to
a battery capacity of 4 to 72 Ah. Self-consumption from the battery is
very low, less than 0.2 mA.
The LED lamps indicate battery regulator conditions. In order to
maximize autonomy time, the LED lamps are activated only while
pressing the ON button. QBR101 is a rail-mountable unit allowing for
easy maintenance.
Power Supply Unit BWC15SXZ
The AC (mains) power supply unit BWC15SXZ is a switching power
supply, which operates from the universal AC input of 85 to 264 VAC
and 47 to 440 Hz. The output voltage is 15 VDC, which is used for
powering the MAWS201MP system, and as an input to the battery
regulator QBR101 for charging the backup battery. BWC15SXZ is
installed inside QMP202MP on a standard DIN-rail enabling easy
maintenance of the unit.