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5.5 Selection of the sensor type
The case controller uses 2-wire NTC temperature sensors for the regulation. For the variants UA 400 E CC / UA
401 E CC / UA 410 E AC, 5 sensors (Z1..Z5 for single-zone operation) can be connected, for the variants UA
400 E CC / UA 410 E AC, 10 sensors (Z1..Z5 / Z6..Z10) can be connected for two-zone operation).
UA 410 E AC (complete design)
All connected sensors must be identical in their type and are not parametrised individually. The type of the
sensorcanbesetwiththeparameterFühlertyp(menu6-2-5).Fordetails,seechapterTerminal assignment of
the analogue inputs for temperature sensors.
The following NTC sensors are intended:
L243 (K243) - temperature range -50 .. 50 °C
The sensor K243 can also be used instead of the sensor L243. The characteristic curves of these two
sensors are identical.
K277 - temperature range -50 .. 50 °C
5K3A1 - temperature range 0 .. 100 °C
For detailed information and dimension details, see chapter Mechanical data of the temperature sensors L243 /
5K3A1.
ATTENTION
The sensors must be mounted carefully. If sensor cables are exclusively laid within the refrigerated
case to be monitored, and sources of interference (for example parallel power lines) are not
anticipated, then it is possible to dispense with shielding. Otherwise, interference in the sensor cables
must be prevented using suitable measures.
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