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MA860H Microstepping Driver Manual V1.0
Mechanical Specifications
Elimination of Heat
Driver's reliable working temperature should be <70℃(158℉), and motor working temperature should be <80℃(176℉);
It is recommended to use automatic idle-current mode, namely current automatically reduce to 60% when motor stops, so as to
reduce driver heating and motor heating;
It is recommended to mount the driver vertically to maximize heat sink area. Use forced coolingmethod to cool the system if
necessary.
3. Pin Assignment and Description
The MA860H 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
PUL+
Pulse signal: In single pulse (pulse/direction) mode, this input represents pulse signal; 4-5V when
PUL-HIGH, 0-0.5V when PUL-LOW. For reliable response, pulse width should be longer than 1.5μs.
Series connect resistors for current-limiting when+12V or +24V used. The same as DIR and ENA
PUL-
signals.
DIR+
DIR signal: In single-pulse mode, this signal has low/high voltage levels,representing two directions of
motor rotation; 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 motion direction is also related
DIR-
tomotor-driver wiring match. Exchanging the connection of two wires for a coilto the driver will reverse
motion direction.
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
ENA-
and low level fordisabling the driver. Usually left UNCONNECTED (ENABLED)
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(unit:
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Figure 1: Mechanical specifications
*Recommend use side mounting for better heat dissipation
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