Stepper Motor Driver Closed Loop Router Machine Protective CNC DC20‑80V Black Shell Item Type: Stepper Motor Driver Color: Black shell Model: HBS57H Terminal Interface: A+, Access Mode: A phase motor winding + Terminal Interface: A-, Access Mode: A phase motor winding - Terminal Interface: B+, Access Mode: B phase motor winding + Terminal Interface: B-, Access Mode: B phase motor winding - Terminal Interface: +VDC. Access Mode: Power input positive Terminal Interface: GND, Access Mode: Power input negative Terminal Interface: EB+, Access Mode: Motor encoder B phase positive input Terminal Interface: EB-, Access Mode: Motor encoder B phase negative input Terminal Interface: EA+, Access Mode: Motor encoder A phase positive input Terminal Interface: EA-, Access Mode: Motor encoder A phase negative input Terminal Interface: VCC, Access Mode: Encoder power +5V input Terminal Interface: EGND, Access Mode: Encoder power ground Terminal Interface: PU+, Access Mode: Pulse positive input Terminal Interface: PU-, Access Mode: Pulse negative input Terminal Interface: DR+, Access Mode: Direction positive input Terminal Interface: DR-, Access Mode: Direction negative input Terminal Interface: ENA+, Access Mode: Motor enable positive input Parameter Minimum value Typical value Maximum value Unit Continuous output current 1 - 6 A Input voltage 20 - 80 VDC Logic input current 7 10 20 mA Machine power - - 50 W Pulse frequency 0 - 300 kHz Insulation resistance 500 - - MΩ Parameter setting Function code Typical value Operating mode P-00 0~2 Microstep P-01 200~51200 Direction of operation P-04 0~1 Closed running current P-05 0~150 Open running current P-06 0~100 Holding current P-07 0~100