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Operating Environment and other Specifications
Cooling
Environment
Ambient Temperature
Operating Environment
Humidity
Operating Temperature
Vibration
Storage Temperature
Weight
3. Pin Assignment and Description
The DM422 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 (software configurable); 4-5V when
PUL-HIGH, 0-0.5V when PUL-LOW. In double pulse mode (pulse/pulse) ,
PUL
this input represents clockwise (CW) pulse，active both at high level and low
level (software configurable). For reliable response, pulse width should be
longer than 7.5μs. 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 (software
configurable), this signal is counter-clock (CCW) pulse，active both at high
level and low level (software configurable). For reliable motion response, DIR
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-driver wiring match. Exchanging the connection of two wires for a coil
to the driver will reverse motion direction.
Opto-coupler power supply, and the typical voltage is +5V. Series connect
OPTO
resistors (at the PUL, DIR, ENA terminals) for current-limiting when +12V or
+24V used.
Enable signal: This signal is used for enabling/disabling driver. High level for
ENA
enabling the driver and low level for disabling the driver. Usually left
UNCONNECTED (ENABLED).
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DM422 Digital Stepping Driver Manual V1.0
Natural Cooling or Forced cooling
Avoid dust, oil fog and corrosive gases
0℃－50℃ (32℉－122℉)
40%RH－90%RH
70℃ (158℉) Max
2
5.9m/s
Max
-20℃－65℃ (-4℉－149℉)
Approx. 100g (3.5274oz)
Details
3
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Selecting Active Pulse Edge and Control Signal Mode
The DM422 supports PUL/DIR and CW/CCW modes and pulse active at rising or falling edge. See
more information about these settings in Section 13. Default setting is PUL/DIR mode and rising
edge active.
Connector P2 Configurations
Pin Function
+Vdc
Power supply, 20~40 VDC, Including voltage fluctuation and EMF voltage.
GND
Power Ground.
A+, A-
Motor Phase A
B+, B-
Motor Phase B
4. Control Signal Connector (P1) Interface
The DM422 uses opto-couplers to increase noise immunity and interface flexibility. If the
opto-couplers' supply voltage is higher than +5V, a current-limiting resistor needs to be connected
at each command signal terminal to prevent overheating the opto-couplers. In the following
figures, connections to open-collector and differential controller are illustrated.
Figure 2: Connections to open-collector signal (common-anode)
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DM422 Digital Stepping Driver Manual V1.0
Details
4
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