This driver is the 1.5A-3A version, it's specially designed for stepper motors with rated current from 1.5A to 3.5A, it's NOT compatible with stepper motors with rated current below 1.5A or above 3.5A.
1x TB6560 Stepper Motor Driver 1.5A-3.5A
6x Wire connectors
1x DB25 parallel cable
1x CD software
Input Power : 12 - 36V DC Note that many forums state that this board dies in smoke if powered over 24V
Stepper Motor Drive Current : 1.5A - 3A/phase
Drive Type : Double-pole constant flow PWM actuation output
Compatible Stepper Motors : 2 or 4 phase, 4,6 or 8 lead stepper motors, 3A max.