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Important NOTE：
The driver must be mounted vertically onto
a plate or a heat sinking to maximize heat sink area as shown
in the above picture. Please use additional heat sinking or cool
fan if necessary.
Operating Environment and other Specifications
Cooling
Environment
Ambient Temperature
Operating Environment
Humidity
Operating Temperature
Vibration
Storage Temperature
Weight
3. Pin Assignment and Description
The DM870 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.
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DM870 Digital Stepping Driver Manual V1.0
Natural Cooling or Forced cooling
Avoid dust, oil fog and corrosive gases
0 ℃ － 40℃ (32℉ － 104℉)
40%RH － 90%RH
70℃ (158℉) Max
2
5.9m/s
Max
-20 ℃ － 65℃ (-4℉ － 149℉)
Approx. 280g (10 oz)
3
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Connector P1 Configurations
Pin Function
Pulse signal: In single pulse (pulse/direction) mode, this input represents pulse
PUL+
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) ,
this input represents clockwise (CW) pulse，active both at high level and low
level (software configurable). For reliable response, pulse width should be
PUL-
longer than 2.5μs. 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
DIR+
configurable), this signal is counter-clock (CCW) pulse，active both at high
level and low level (software configurable). 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
DIR-
motor-Drive wiring match. Exchanging the connection of two wires for a coil
to the Drive will reverse motion direction.
Enable signal: This signal is used for enabling/disabling the Drive. High level
ENA+
(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
ENA-
disabling the Drive. Usually left UNCONNECTED (ENABLED).
Selecting Active Pulse Edge and Control Signal Mode
The DM870 supports PUL/DIR and CW/CCW modes and pulse actives at rising or falling edge. See
more information about these settings in Section 13. Default setting is PUL/DIR mode and rising
edge active (NPN, and PNP control signal is on the contrary).
Connector P2 Configurations
Pin Function
+Vdc
Power supply, 24~72 VDC, Including voltage fluctuation and EMF voltage.
GND
Power Ground.
A+, A-
Motor Phase A
B+, B-
Motor Phase B
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DM870 Digital Stepping Driver Manual V1.0
Details
Details
4
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