8
2.8 Battery Low Voltage Protection (BLVP or commonly known as an LVD)
PM300-BT master power unit has a built-in low voltage protection relay. It will disconnect the load once the battery voltage drops below
the threshold voltage. The default setting is 10.5VDC. This switch can be manually turned On/Off via the LOAD button on the LCD display.
2.9 Battery Switch
The PM300-BT unit offers a convenient way to switch off the output of the service battery on-board. It protects the service battery from
being drained by electronics on board, completely isolating the battery. PM300-BT unit also supports a remote manual battery switch.
Before using the remote switch, ensure the ‘switch selector’ is set to ‘Remote’.
The switch is only effective when the system has no other energy resource for the load except the battery.
Figure 7 Categorised output
Table 2 Categorised outputs
TYPE QTY DESCRIPTION POSSIBLE LOAD SUITABLE
Class A1 1 Relay controlled output with fuse, protected by
main master switch relay
Water pump
Class B 10 Fused outputs, protected by master switch relay Ventilation fan etc
Class C 2 Live load Fridge, security alarm etc.
Class D 1 Permanent on load Auto step
2.10 Precise Battery Measurement
PM300-BT unit has a battery measurement system controlled by microprocessor. It measures battery voltage, charge/discharge
current, remaining AH and display time to go.
Compared to conventional indicating meters, a small current can be measured and read accurately with this device.
With this feature, it highlights faults, alarms and installation errors.
NOTE: If you have loads connected directly on battery instead of PM300-BT Power Management System, the
measurement will not be accurate.
2.11 Silent Mode
In Silent Mode, the backlight of the monitor and the fan will be turned off or decreased in speed.
2.7 Categorised Outputs
The 14 outputs are categorised into groups and controls as per below:
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