MK2B Heatbed Heated Heat Bed 214 x 214 Dual Power 12/24V with 97Cm Cable

Features:
1. 12V 24 power supply is free to connect
2. Double-sided board, no wiring on the other side, uniform heating, smooth printing effect
3. Wiring regardless of the positive and negative poles, connect at will

testing report:
Connect to 12V
The current is 9.8A. As the temperature rises, the current drops to 8.8A (a little knowledge of physics: the resistance increases with the increase in temperature)

Connect to 24V
Theoretical current is less than 5A

Official introduction;
http://reprap.org/wiki/Heated_Bed

If 24V is used, the current is very large at this time, and the MOS tube generates serious heat and is easily burnt due to high temperature.
In addition, it is necessary to consider whether the power supply is sufficient. A power supply with a power of up to 576W is very expensive. If the power supply is insufficient, it may affect the normal operation of other equipment such as motors.
Also pay attention to whether the wire is hot and soft because it is not thick enough?

New version mk2b:
Compared with the new version of Mk2a, the main upgrade is 12V 24V dual power supply.

12V connection: one wire is connected to 1, the other wire is connected to 2 and 3 at the same time.

24V connection method: one wire is connected to 2, the other wire is connected to 3 (1 is not connected)

Official data reference

Dimensions 214mmx 214mm
Laminate FR4 1.6+-0.15mm
2 layer, 35μm copper
Red Soldermask-both sides
White Silkscreen-both sides
Power Input: 12V or 24v
copper plated holes