MC2502 View Datasheet(PDF) - PMD
Part Name
Description
MFG CO.
'MC2502' PDF : 51 Pages View PDF
Pin Name and Number
AtRest1
23
AtRest2
86
AtRest3
63
AtRest4
80
Direction
Output
QuadA1
QuadB1
QuadA2
QuadB2
QuadA3
QuadB3
QuadA4
QuadB4
47
Input
25
48
44
33
51
30
58
~Index1
~Index2
~Index3
~Index4
49
Input
93
83
28
~Home1
~Home2
~Home3
~Home4
82
Input
29
88
45
Vcc
GND
unassigned
16, 17, 40, 65, 66, 67,
90
4, 9, 22, 34, 46, 57, 64,
72, 84, 96
19, 27, 55, 56, 62, 78,
87
I/O Chip
Description
The AtRest signal indicates the axis is at rest and the step motor can be
switched to low power or standby. A high level on this signal indicates
the axis is at rest. A low signal indicates the axis is in motion.
For MC2542 all 4 pins are valid. For MC2522 only AtRest1 and AtRest2
are valid. For MC2512 only AtRest1 is valid.
Invalid axis pins may be left unconnected.
These pins provide the A and B quadrature signals for the incremental
encoder for each axis. When the axis is moving in the positive (forward)
direction, signal A leads signal B by 90°.
The theoretical maximum encoder pulse rate is 5.1 MHz. Actual
maximum rate will vary, depending on signal noise.
NOTE: Many encoders require a pull-up resistor on each signal to
establish a proper high signal. Check your encoder’s electrical
specifications.
For MC2542, all 8 pins are valid. For MC2522, only the first four pins
(axes 1 and 2) are valid. For MC2512, only the first two pins (axis 1) are
valid.
WARNING! If a valid axis pin is not used, its signal should
be tied high.
Invalid axis pins may be left unconnected.
These pins provide the Index quadrature signals for the incremental
encoders. A valid index pulse is recognized by the chipset when ~Index, A,
and B are all low.
For MC2542, all 4 pins are valid. For MC2522, only ~Index1 and ~Index2
are valid. For MC2512, only ~Index1 is valid.
WARNING! If a valid axis pin is not used, its signal should
be tied high.
Invalid axis pins may be left unconnected.
These pins provide the Home signals, general-purpose inputs to the
position-capture mechanism. A valid Home signal is recognized by the
chipset when ~Homen goes low. These signals are similar to ~Index, but are
not gated by the A and B encoder channels.
For MC2142, all 4 pins are valid. For MC2122, only ~Home1 and ~Home2
are valid. For MC2112, only ~Home1 is valid.
WARNING! If a valid axis pin is not used, its signal should
be tied high.
Invalid axis pins may be left unconnected.
All of these pins must be connected to the I/O chip’s digital supply
voltage, which should be in the range 4.75 to 5.25 V.
I/O chip ground. All of these pins must be connected to the digital
power supply return.
These pins must be left unconnected (floating).
MC2502 Technical Specifications
32
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