RST050
INSTALLATION
&
USER
MANUAL
15
Excessive Discharge and Undercharge
Caution:
Discharging the batteries below the end-point voltage
levels or leaving the batteries connected to a load in a
discharged state may impair the ability of the batteries to
accept a charge.
Batteries undercharged in cyclic applications will fail, often in
less than 30 cycles.
Over Discharge Safety Cut-out
When input power is absent, the RST050 employs an automatic safety cut-off from
the battery load if the battery voltage falls below 18 volts. If the safety cut-off is
activated, the load effectively becomes disconnected from the battery.
The automatic cut-off is only released if:
1. The input power is re-applied or,
2. If the 4-pin connector is removed and then re-applied after 10 seconds.
Using the RST050 with other BEAM products
The RST050 may be used with other BEAM products such as the RST200 and
RST600. Both of these products have lower power requirements than the RST100
and a proportional increase in backup time can be obtained.
The table below shows the power consumed by different Beam equipment. In normal
applications, the RST050 will supply power on a 22+2 basis i.e. 22 hours of standby
and 2 hours of talk time for the RST100 and 42+4 for the RST200.
All measurements taken at 20Vdc with Precision Current Shunt, RMS time-averaged. Results are
typical values, some variation will be encountered.
Power Requirements Matrix
Receive Mode
Transmit Mode
22+2 Average UPS Backup
Current (A) Power (W) Current (A) Power (W)
Power (W)
Time (h)
Data Call
0.075 1.5 0.205 4.1
1.7
46.5
RST200
DSC Handset
0.15 3.0 0.325 6.5 3.3
24
Receive Mode
Transmit Mode
22+2 Average UPS Backup
Current (A) Power (W) Current (A) Power (W)
Power (W)
Time (h)
RST600
Data Call
0.05
1.0
0.12
2.4
1.1
72
