Geo Brick Drive User Manual
Pinouts and Software Setup
56
X1-X8: Encoder Feedback, Digital A Quad B
X1-X8: D-sub DA-15F
Mating: D-sub DA-15M
2
3
4
5
6
7
8
9
10
11
12
13
14
15
1
Pin#
Symbol
Function
Description
1
CHA+
Input
Encoder A+
2
CHB+
Input
Encoder B+
3
CHC+ / AENA+
Input
Encoder Index+ / Stepper amp
4
ENCPWR
Output
Encoder Power 5V
5
CHU+ / DIR+
In/Out
Halls U+ / Direction for Stepper
6
CHW+/ PUL+
In/Out
Halls W+ / Pulse for Stepper
7
2.5V
Output
2.5V Reference power
8
Stepper Enable
Input
Tie to pin#4 (5V) to enable PFM output
9
CHA-
Input
Encoder A-
10
CHB-
Input
Encoder B-
11
CHC- / AENA-
Input
Encoder Index- / Stepper amp enable -
12
GND
Common
Common ground
13
CHV+ / DIR-
In/Out
Halls V+ / Direction Output- for Stepper
14
CHT+ / PUL-
In/Out
Halls T+ / Pulse Output- for Stepper
15
-
-
Unused
Note
Use an encoder cable with high quality shield. Connect the shield to
connector shell, and use ferrite core in noise sensitive environments.
The standard encoder inputs on the Geo Brick Drive are designed for differential quadrature type signals.
Quadrature encoders provide two digital signals to determine the position of the motor. Each nominally
with 50% duty cycle, and nominally 1/4 cycle apart. This format provides four distinct states per cycle of
the signal, or per line of the encoder. The phase difference of the two signals permits the decoding
electronics to discern the direction of travel, which would not be possible with a single signal.
Summary of Contents for Geo Brick
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