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DM542 Fully Digital Stepper Drive Manual V1.0

3. Pin Assignment and Description

The DM542 has two connectors, connector P1 for control signals connections, and connector P2 for power and motor

connections. The following tables are brief descriptions of the two connectors. More detailed descriptions of the pins

and related issues are presented in section 4, 5, 9.

Connector P1 Configurations

Pin Function Details

PUL+

PUL-

Pulse signal: In single pulse (pulse/direction) mode, this input represents pulse signal, each

rising or falling edge active (set by inside jumper J3); 5-24V when PUL-HIGH, 0-0.5V when

PUL-LOW. In CCW mode (set by inside jumper J1), this input represents clockwise (CW)

pulse. For reliable response, pulse width should be longer than 2.5μs.

DIR+

DIR-

DIR signal: In single-pulse mode, this signal has low/high voltage levels, representing two

directions of motor rotation; in CW/CCW mode (set by inside jumper J1), this signal is

counter-clock (CCW) pulse. For reliable motion response, DIR signal should be ahead of PUL

signal by 5μs at least. 5-24V when DIR-HIGH, 0-0.5V when DIR-LOW. Please note that

rotation direction is also related to motor-driver wiring match. Exchanging the connection of

two wires for a coil to the driver will reverse motion direction.

ENA+

ENA-

Enable signal: This signal is used for enabling/disabling the driver. High level (NPN control

signal, PNP and differential control signals are on the contrary, namely low level for enabling.)

for enabling the driver and low level for disabling the driver. Usually left UNCONNECTED

(ENABLED).

Selecting Active Pulse Edge or Active Level and Control Signal Mode

There are two jumpers J1 and J3 inside the M860 specifically for selecting active pulse edge or effective level and

control signal mode, as shown in figure 2. Default setting is PUL/DIR mode and upward-rising edge active. (Note: J2

inside the driver is used to reverse the default rotation direction.)

(a) J1, J3 open circuit (b) J1 open circuit, J3 shirt circuit

PUL/DIR mode and Active at rising edge (NPN) PUL/DIR mode and active at falling edge (NPN)

CW/CCW mode CW/CCW mode

Figure 2: J1 and J3 jumper Settings

Leadshine Technology DM542 User Manual

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