What Are The Accessories; Temperature Sensors; Temperature Sensor - Where Used - Elstat ems75sz Manual

7

What are the accessories?

The accessories for EMS controllers are as follows:

Temperature sensors

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Motion sensors
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Door switches
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Safety isolating transformers - if applicable
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The accessories list defines the items used with EMS controllers such as the parameter pro-
gramming tool, temperature sensors, door switches, transformers, covers, and so on.
Each item in the accessories list has short description and part number. The part number is required
to order accessories.
7.1 Temperature sensors
Temperature sensors are available from Elstat with various cable lengths. To help identify sensor
cables during the installation, Elstat can supply sensor cables with blue identification sleeves. For
example, if the appliance sensor cable is plain black and the condenser sensor cable can have a blue
identification sleeve.
The sensor circuit is designed for safety extra low voltage (SELV). Therefore, if the sensor cable
needs to be joined during production or maintenance, only connectors normally used in SELV circuits
can be used.
Caution:
Connectors designed to carry mains voltages must not be used to join cables to the sensor circuit.
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The temperature sensors have a negative temperature coefficient (NTC).
Each make and type of sensor has a specific resistance versus temperature curve. Therefore, only
sensors supplied by Elstat should be used.
The NTC thermistor is rated from -35ºC to 125ºC (-31ºF to 257ºF).
The table below shows the temperature input ranges of the EMS controller for each sensor type.
Sensor
Appliance sensor
Condenser sensor
Evaporator sensor
7.2

Temperature sensor - where used

The table below is an at-a-glance view of which controllers (and firmware if applicable) require which
sensor in order to operate effectively:
Input range (ºC)
-10ºC to 23.5ºC
+/- 0.5ºC
50ºC to 125ºC
+/- 5.0ºC
-30ºC to 15ºC
+/- 1.0ºC
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Input range (ºF)
14ºF to 74ºF
+/- 1ºF
122ºF to 257ºF
+/- 10ºF
-22ºF to 59ºF
+/- 2ºF