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Revision to Heaters

Tony

[title|Heaters]
 
[summary]The Duet boards have 3 heaters, with a further 5 on the Duex 5 expansion boards. In Additional onboard temperature sensising channels exist for MCU and built in stepper driver temperature measurement.[/summary]
 
 
 
== Heater numbers ==
 
{table
|! Heater number
|! Thermistor and output label, or internal function
|--
| 0
| Bed
|--
| 1
| E0
|--
| 2
| E1
|--
| 3
| E2 (Duex5 /Expansion)
|--
| 4
| E3 (Duex5 /Expansion)
|--
| 5
| E4 (Duex5 /Expansion)
|--
| 6
| E5 (Duex5 /Expansion)
|--
| 7
| E6 (Duex5 /Expansion)
|--
| 100
| Duet MCU temperature
|--
| 101
| Duet 2 drivers over temperature warnings
|--
| 102
| DueX2/X5 drivers over temperature warnings
}
 
The MCU temperature needs to be calibrated to get an accurate reading, see [[Calibrating the CPU temperature|Calibrating the CPU temperature]]
 
Channels 100 and 101 read 150C if any driver reports over temperature shutdown, otherwise 100C if any driver reads over temperature warning, otherwise 0C.
 
== Temperature sensing inputs ==
 
The Duet series supports 4 types of temperature sensor: thermistor and PT1000, thermocouple, and PT100. (this does not include the onboard temperature sensing channels for MCU/stepper driver sensing). Serperate pages describe these types in more detail:
 
* [[Connecting PT100 temperature sensors|Connecting PT100 temperature sensors]]
* [[Connecting thermistors or PT1000 temperature sensors|Connecting thermistors or PT1000 temperature sensors]]
* [[Connecting thermocouples|Connecting thermocouples]]