View source for TTJ Temperature sensor

[[File:Ttj foto.png|thumb|300px|TTJ Temperature sensor]]


One of the implemented features for fleet management devices is a 1-Wire data protocol, which enables the connection of temperature sensors. It is a perfect accessory for temperature monitoring.<br/><br/>

'''TTJ IS A SOLUTION FOR FLEET MANAGEMENT TRACKER IN FOLLOWING CASES:'''<br/>
# Thermostatic controls – maintain temperature near a desired set point.
# Thermally sensitive system – receive alerts when temperature enters or leaves pre-defined value.
# Consumer products – be assured that the goods which you are delivering will maintain high quality. <br/><br/>

'''Description'''<br/>
The TTJ Temperature sensor provides 9-bit Celsius temperature measurements and has an alarm function with nonvolatile user-programmable upper and lower trigger points. The TTJ communicates over a 1-Wire bus that by definition requires only one data line (and ground) for communication with a central microprocessor. It has an operating temperature range of –55°C to +125°C and is accurate to ±0,5°C over the range of –10°C to +85°C. In addition, the TTJ can derive power directly from the data line (“parasite power”), eliminating the need for an external power supply. Each TTJ has a unique 64-bit serial code, which allows multiple TTJ sensors to function on the same 1-Wire bus. Thus, it is simple to use one microprocessor to control many TTJs distributed over a large area. Applications that can benefit from this feature include HVAC environmental controls, temperature monitoring systems inside buildings, equipment, or machinery, and process monitoring and control systems. <br/><br/>

'''TTJ technical characteristics'''
*Supported by <span class="mw-collapsible mw-collapsed"> [https://wiki.teltonika-gps.com/view/FMB110 FMB110], [https://wiki.teltonika-gps.com/view/FMB120 FMB120], [https://wiki.teltonika-gps.com/view/FMB122 FMB122], [https://wiki.teltonika-gps.com/view/FMB125 FMB125], [https://wiki.teltonika-gps.com/view/FMU125 FMU125], [https://wiki.teltonika-gps.com/view/FMM125 FMM125], [https://wiki.teltonika-gps.com/view/FMC125 FMC125], [https://wiki.teltonika-gps.com/view/FMB130 FMB130], [https://wiki.teltonika-gps.com/view/FMU130 FMU130], [https://wiki.teltonika-gps.com/view/FMC130 FMC130], [https://wiki.teltonika-gps.com/view/FMM130 FMM130], [https://wiki.teltonika-gps.com/view/FMB140 FMB140], [https://wiki.teltonika-gps.com/view/FMB202 FMB202], [https://wiki.teltonika-gps.com/view/FMB204 FMB204], [https://wiki.teltonika-gps.com/view/FMB640 FMB640], [https://wiki.teltonika-gps.com/view/FMC640 FMC640], [https://wiki.teltonika-gps.com/view/FMM640 FMM640] </span>
* Unique 1-Wire® Interface Requires Only One Port Pin for Communication.
* Each Device has a Unique 64-Bit Serial Code Stored in an On-Board ROM.
* Multidrop Capability Simplifies Distributed Temperature Sensing Applications.
* Requires No External Components.
* Can Be Powered From Data Line. Power Supply Range is 3.0 V to 5.5 V.
* Measures Temperatures from -55° C to +125° C (-67° F to +257° F) ±0.5° C Accuracy from -10° C to +85° C.
* 9-Bit Thermometer Resolution.
* Converts Temperature in 750 ms (max).
* User-Definable Nonvolatile (NV) alarm settings.
* Alarm Search Command Identifies and Addresses Devices Whose Temperature is Outside Programmed Limits (Temperature Alarm Condition).
* Applications Include Thermostatic Controls, Industrial Systems, Consumer Products, Thermometers, or Any Thermally Sensitive System.
* Recommendations for cabling: max. cable length 15 meters, category – CAT5. Length over 20 meters increases measuring precision error. <br/>

''TTJ sensor pin-out and connection diagrams:''<br/>
[[File:TTJ connection scheme.PNG|600px]] [[File:Sch fmb120 ds1820.png|400px]]

'''Configuration''' <br/>
On the FMB unit, TTJ sensor parameters are configured as I/O element parameters: ''Dallas temperature'' and ''Dallas temperature ID''.

[[File:T sensor parameter configuration.png|none|700px|caption]]

The configuration procedure is as other I/O element (for example: [[FMB120_I/O_settings]])

==External links==
https://teltonika-gps.com/product/ttj

[[Category:Accessories]]