M542 Economical Microstepping Driver Manual V1.0
Tel: +086 0755-26434369 3 Web Site:
www.leadshine.com
3. Pin Assignment and Description
The M542 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 of the
M542. More detailed descriptions of the pins and related issues are presented in section 4, 5, 9.
Connector P1 Configurations
Pin Function
Details
PUL+(+5V)
PUL-(PUL)
Pulse signal: In single pulse (pulse/direction) mode, this input represents pulse
signal, effective for each rising or falling edge (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
，
effective for high
level or low level (set by inside jumper J1). For reliable response, pulse width
should be longer than 2.5
μ
s. Series connect resistors for current-limiting when
+12V or +24V used.
DIR+(+5V)
DIR-(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
，
effective for high
level or low level (set by inside jumper J1). For reliable motion response, DIR
signal should be ahead of PUL signal by 5
μ
s at least. 4-5V when DIR-HIGH,
0-0.5V when DIR-LOW.
ENA+(+5V)
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 Effective Pulse Edge or Effective Level and Control Signal Mode
There are two jumpers J1 and J3 inside the M542 specifically for the purpose of selecting effective
pulse edge or effective level and control signal mode, as shown in figure 2. Default setting is
PUL/DIR mode and upward-rising edge effective.
(a) J1, J3 open circuit (b) J1 short circuit, J3 open circuit
PUL/DIR mode and effective at upward-rising edge PUL/DIR mode and effective at downward-falling edge
(c) J1 open circuit, J3 short circuit (d) J1, J3short circuit
CW/CCW mode and effective CW/CCW mode and effective
at high level (The fixed level) at low level (The fixed level)
Figure 2: J1 and J3 jumpers
M542 Economical Microstepping Driver Manual V1.0
Tel: +086 0755-26434369 4 Web Site:
www.leadshine.com
Connector P2 Configurations
Pin Function
Details
GND
DC power ground
+V
DC power supply, 20~50VDC, Including voltage fluctuation and EMF
voltage.
A+, A-
Motor Phase A
B+,B-
Motor Phase B
4. Control Signal Connector (P1) Interface
The M542 can accept differential and single-ended input signals (including open-collector and PNP
output). The M542 has 3 optically isolated logic inputs which are located on connector P1 to accept
line driver control signals. These inputs are isolated to minimize or eliminate electrical noises coupled
onto the drive control signals. Recommend use line driver control signals to increase noise immunity
of the driver in interference environments. In the following figures, connections to open-collector and
PNP signals are illustrated.
Figure 3: Connections to open-collector signal (common-anode)
Figure 4: Connection to PNP signal (common-cathode)
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