Looking back, the Duet 2 Wifi:

A 2-pin 3.5mm terminal block is provided for connecting each of the two supported hot end heaters. The design is rated to 5A per extruder heater connection.

I'll just answer my own question, it seems like it'll be safe. The 3.5mm terminal block that comes with Duet 2 Wifi appears flimsy, would be nice if they made the housing stronger.

I went ahead and wired both heaters together in parallel using ferrule 20 awg terminal. It fits snuggly into the 2-pin 3.5mm terminal block.

Used single PT1000 thermistor from the hotend to measure the temperature.

So far I had not see any issues, I just made sure it's tightly fastened and watched it while I cranked it to the hottest I can peaking out around 98 watts (measured).

Just wanted to update everyone whoever may sees this while searching on google.

Looking back, the Duet 2 Wifi:

A 2-pin 3.5mm terminal block is provided for connecting each of the two supported hot end heaters. The design is rated to 5A per extruder heater connection.

I'll just answer my own question, it seems like it'll be safe. The 3.5mm terminal block that comes with Duet 2 Wifi appears flimsy, would be nice if they made the housing stronger.

I went ahead and wired both heaters together in parallel using ferrule 20 awg terminal. It fits snuggly into the 2-pin 3.5mm terminal block.

Used single PT1000 thermistor from the hotend to measure the temperature.

So far I had not see any issues, I just made sure it's tightly fastened and watched it while I cranked it to the hottest I can peaking out around 98 watts (measured).

Just wanted to update everyone whoever may sees this while searching on google.

Hello all,

I am planning on upgrading from a single 50W Mosquito Magnum to the 100W (50W+50W) Magnum Plus, I searched and didn't find a clear answer how this can be plugging it into the Duet 2 Wifi board controlling each heater independent on the same hotend. That other post suggested just to wire both heaters together and use a single heater port.

So I did some researching on Duet 2 Wifi and noticed that it said:

Bed heater (up to 18A), 2 x extruder heater (up to 6A each)

So for 100W, 50W Heaters at 24V will generate around 2.1A each, meaning it'll consume 4.2A.

Is it safe to wire both 50W Heaters in parallel using a single heater port on the Duet. I wasn't sure if there is a factor of safety on max current vs actual current draw... Last thing I wanted was to burn the board or even worse...

In addition, what are the appropriate connectors to wire these heaters together then to the Duet 2? Also any recommendation on a good and safe junction box to join the wires? I was thinking ferrule connectors, but wasn't sure what junction/terminal box to use.

I saw in that other post someone recommend Wago Block for bare wire terminals, but I am not sure if it's safe to use with crimped ferrule connectors. The heater cartridges from Slice Engineering comes pre-crimped with ferrule.

Many thanks!