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Section 4
Functional description
4.4.2
30
communication alive during a mains failure. Thus the communication between the
device and a network control centre operates in any situation.
Depending on the application and the required maximum operation time, batteries of
different capacity are used; the typical capacity is 17 Ah. With the 17 Ah battery, the
maximum operation time is 48 hours (including safety coefficient) at ambient
temperature of +20°C.
A low temperature reduces battery capacity and lifetime.
Heater control
The heater control is based on the environmental temperature. Heating is needed if the
device is installed in a separate enclosure outdoors where the ambient temperature
may be below 0°C. Heating is specifically required in very damp conditions when
dehumidifying is needed. The heating control consists of switching on and off an
output pin connected to an external control relay of the heating element (resistor),
which is located in the enclosure, preferably next to the batteries and the electronics
components.
The device contains an internal thermostat for controlling the external heater. The
heater element can be set to be constantly on, for example, if the element contains an
internal thermostat, constantly off or to be controlled by the environmental
temperature.
The heater output pins are X4 7 and 8. This is defined by giving the parameter
heater_output value "9".
The settings are defined in the section [HEATER].
trigger_limit+trigger_hyst
trigger_limit
HEATING OFF
GUID-F7FFDC79-AE39-4582-BA38-32ADF4C433FD V1 EN
Figure 15:
Heater control on auto-mode
HEATING ON
HEATING ON
HEATING OFF
Time
1MRS758459 C
ARC600
User Manual
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