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Product description
Alternatively, the terminal can be powered from the battery only which requires
regular battery replacement. An alternative is to have the battery charged from a
power source that is regularly available, such as a street light post.
Danger:
Always ensure that the external power supply to the terminal is disconnected or
switched OFF before carrying out any work on parts that ordinarily conduct
dangerous current.
4.8.1
Power control
The battery voltage can be measured automatically on a regular basis and a
report can be sent to WebOffice periodically. See the CWT Software
Configuration Handbook.
A warning event can be generated and sent to WebOffice if the voltage drops
below a certain warning level. The default value is 11.9 V.
The terminal will be set in error state and an error event can be sent to
WebOffice if the voltage drops below a certain error level. The default value is
11.5 V.
A restore event will be generated and can be sent to WebOffice when the
voltage, while increasing, reaches a certain recovery level. The default value is
12.1 V. A typical measured value is 12.5 V.
Note:
The automatically measured voltage usually differs from the battery voltage
measured with a voltage meter without any load applied.
When the battery is being charged, the measured charging voltage will be
approximately 13.7 V.
Under certain circumstances, a sleep mode function can be activated if the
terminal is solar powered or powered by the battery only.
Important:
The minimum voltage required for proper ticket printing and operation of the
electronic locks is 11.1 V at room temperature (20 °C).
4.8.2
Battery charging by solar power
A solar powered terminal has no battery charger. Instead, the solar panel
charges the battery via the CPU board and a cable between the CPU board and
the battery. The CPU board measures the charging current and if the charging
voltage exceeds 18 V a fuse will blow.
The result of the measured charging current is sent to WebOffice. A warning
event will be generated if the current drops below the warning level and the
terminal will be set in error state if the current drops below the error level. A
restore event will be generated when the current reaches the recovery level.
Reference:
See CWT Software Configuration Handbook for more information about this.
Issue 5
CWT S5 Installation & Maintenance Manual
Page 36
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