M542 CNC Stepper Driver Support Nema 17, Nema 23, Nema 34 Stepper Motors 1.0A-4.2A

Parameters

M542 V2.0

Min

Typical

Max

Unit

Output current

1.0

-

4.2 (3.0 RMS)

A

Supply voltage

+20

+36

+50

VDC

Logic signal current

7

10

16

mA

Pulse input frequency

0

-

300

kHz

Isolation resistance

500

Mohm

Pin Function

Details

PUL+

Pulse signal: In single pulse (pulse/direction) mode, this input represents pulse signal, each rising or falling edge active (set by inside jumper J1); 4-5V when PUL-HIGH, 0-0.5V when PUL-LOW. In double pulse mode (pulse/pulse) , this input represents clockwise (CW) pulse,active at high level or low level (set by inside jumper J1, J2). For reliable response, pulse width should be longer than 1.5µs. Series connect resistors for current-limiting when +12V or +24V used. The same as DIR and ENA signals.

PUL-

DIR+

DIR signal: In single-pulse mode, this signal has low/high voltage levels, representing two directions of motor rotation; in double-pulse mode (set by inside jumper J3), this signal is counter-clock (CCW) pulse,active at high level or low level (set by inside jumper J1, J2). For reliable motion response, DIR signal should be ahead of PUL signal by 5µs at least. 4-5V when DIR-HIGH, 0-0.5V when DIR-LOW. Please note that rotation direction is also related to motor-drive wiring match. Exchanging the connection of two wires for a coil to the drive will reverse motion direction.

DIR-

ENA+

Enable signal: This signal is used for enabling/disabling the drive. High level (NPN control signal, PNP and Differential control signals are on the contrary, namely Low level for enabling.) for enabling the drive and low level for disabling the drive. Usually left UNCONNECTED (ENABLED).

ENA-

Pin Function

Details

+V

Power supply, 20~50 VDC, Including voltage fluctuation and EMF voltage.

GND

Power Ground.

A+, A-

Motor Phase A

B+, B-

Motor Phase B