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It is recommended to mount the driver vertically to maximize heat sink area. Use forced cooling
method to cool the system if necessary.
3. Pin Assignment and Description
The M542 V2.0 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
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+
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
PUL-
longer than 1.5μs. Series connect resistors for current-limiting when +12V or
+24V used. The same as DIR and ENA signals.
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
DIR+
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
DIR-
related to motor-driver wiring match. Exchanging the connection of two wires
for a coil to the driver will reverse motion direction.
Enable signal: This signal is used for enabling/disabling the driver. High level
ENA+
(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
ENA-
disabling the driver. Usually left UNCONNECTED (ENABLED).
Selecting Active Pulse Edge or Active Level and Control Signal Mode
There are three jumpers J1, J2 and J3 inside the M542 V2.0 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 rising edge active (NPN, and PNP control signal is on the contrary).
(a) J1, J2, J3 open circuit
PUL/DIR mode and Active at rising edge (NPN)
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M542 V2.0 Microstepping Driver Manual V1.0
Details
(b) J2, J3 open circuit, J1 shirt circuit
PUL/DIR mode and active at falling edge (NPN)
3
(c) J1, J2 open circuit, J3 short circuit
CW/CCW mode and active
at low level (The fixed level)
Connector P2 Configurations
Pin Function
+V
GND
A+, A-
B+, B-
4. Control Signal Connector (P1) Interface
The M542 V2.0 can accept differential and single-ended inputs (including open-collector and PNP
output). The M542 V2.0 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.
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M542 V2.0 Microstepping Driver Manual V1.0
(d) J1, J2, J3short circuit
CW/CCW mode and active
at high level (The fixed level)
Figure 2: J1 and J3 jumpers
Details
Power supply, 20~50 VDC, Including voltage fluctuation and EMF voltage.
Power Ground.
Motor Phase A
Motor Phase B
Figure 3: Connections to open-collector signal (common-anode)
4
DOLD Mechatronik
Sarach 10 – D-77790 Steinach
Telefon: +49 7832 / 9744670
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