Temperature sensors

Starting with firmware 15.9 in Nord GSM, the ability to configure wired and wireless temperature sensors has been added.

Permanent interface polling mode 1-Wire

In order for the device to detect a wired temperature sensor, you need to enable the mode of continuous polling of the1-Wire interface in the device settings. 

This can be done on the “Miscellaneous” tab in the “Control and Indication” section.

Warning! Some proximity card readers emulating the Dallas1990 protocol are not able to work in this mode.

Connecting the sensor to the device

Wired temperature sensor connects to the Reader group of terminals. The black and red wires from the sensor should be twisted together and connected to the “GND” terminal, and the yellow - to the “DATA” terminal - as shown in the picture below.

If you need to connect several wired temperature sensors, then all of them should be connected in parallel to each other.
To the wireless temperature sensor CH-Celsius, you can connect a wired one.

Connection diagram of the wired temperature sensor to Nord Mini:


If everything is connected correctly and the polling mode of the 1-Wireline is turned on, then the wired temperature sensor connected to the device should appear on the “Zones” tab in the configurator. It looks like this:

Loop numbers

Wired temperature sensors always get loop numbers from 48 to 51 inclusive. 

Why is it like this?
Numbers 1-8 are occupied by wired cables located on the instrument board
Numbers 9-16 are occupied by wired loops, which are connected through the extender EW-8 or EW-12.
Numbers 17-47 are occupied by wireless devices.

Thus, the first free number of the loop (zone) is 48, and it is from here that the numbering of the wired begins – precisely wired – temperature sensors.

In total, no more than 4 temperature sensors can be connected to the device. Wired and wireless. Total of 4.

If we assume that all four sensors are wired, then they will occupy the loop numbers from 48 to 51.


Some details about the sensor operation with thresholds are given in the window that opens in the Hubble configurator, if you click on the question next to the low temperature threshold value:

The device constantly polls the sensor and compares the values obtained from it with the programmed thresholds. If the value is higher or lower than the lower threshold, an event is generated.
Important! If suddenly the device has no connection with the sensor, for example, due to cable damage, there will also be no temperature control, including in retrospect (no values — no controls, no history — either).

Turning on and off

Immediately after connecting to the device, the temperature sensor is turned off. In order to configure the sensor and begin to poll it with the device, the sensor must be turned on. Each sensor has a unique serial number with which the device can identify it. Identification may be useful if, during instrument maintenance, the sensors were temporarily disconnected and then connected again.
If, for some reason, the sensor was disconnected from the device, or the communication line with the sensor was damaged, then in order to prevent amalfunction event (interruption of the loop) from the device, the sensor can be turned off in the device settings.

Sensor removal

In order to remove a wired temperature sensor from the device configuration, it must first be physically disconnected from the device. After that, in the configurator in front of the sensor, the “RecycleBin” icon will appear - the device is deleted.

The requirement to disable the sensor before removing it is important: if the sensor is not disabled, immediately after removal it will be found again by the device and it will look as if the removalwas not completed.

Status bar

Wired temperature sensors are displayed in the status bar on the “Zones” tab.
Under the loop number, the current temperature received from the sensor is always displayed if the sensor and the communication line with it are in good condition.

If the threshold is violated (in the figure,the low temperature threshold) an alarm is displayed in the status bar.

What sensors can be connected?

Wired: any sensors made on the basis of the Dallas DS18B20 sensor are acceptable. You just need to keep in mind that the colors of the wires may be different, and the efficiency of the sensor is the thing we will not be able to guarantee.

Wireless – only CN-Celcius.

We recommend installing already proven sensors. You can purchase them in the Cnord store.