Leica GR30 Online Help Manual page 207

Power supply
Primary supply
Internal battery
Charging mode
182
Description
GR25/50:
Select the primary power supply.
•
External 1
External 1 is used as the primary supply.
•
External 2
External 2 is used as the primary supply.
•
Power over Ethernet (PoE)
PoE is used as the primary supply (requires network connection with Power
over Ethernet compliant with the standard IEEE 802.3, class 0 PoE
solution).
If the selected primary power supply is no longer available
then the receiver automatically switches to a secondary
power supply, if available. The receiver automatically
selects the power supply in the following order of priority
1. External 1 or 2 (whichever is available)
2. Power over Ethernet (PoE)
3. Internal battery
PoE supplies 13 Watts of current. This is insufficient for
some external devices. If insufficient current is available
for external devices, they will be disabled by the receiver.
Please check the devices power specification before use
or use an external power supply to power the device.
Description
GR25/50:
Select the internal battery charging mode.
•
UPS mode
Uses trickle charging to optimise the life span of the battery. This mode is
ideal for permanent reference station installations where the internal battery
is used as a temporary backup supply during periods when the primary
external supply fails. Note that the charge will not reach 100%.
•
Campaign mode
Campaign mode uses cycle charging to optimise battery charge for field
campaigns. This mode is ideal if the battery is regularly used as the primary
power supply.
Internal battery charging is only initiated when the power
received from the external power supply is at least 2V
above battery voltage.