Electrical Specifications
30
3
The compact Atlas package provides additional power output via doubling of the HV, Pwr_Gnd, and Motor output
pins. To achieve the rated unit power output be sure that both pins are connected.
3.7.5
Pin Descriptions
Pin Name
Pin
Name
1
Motor D
2
Motor D
3
Motor C
4
Motor C
5
Motor B
6
Motor B
7
Motor A
8
Motor A
9
HV
10
HV
11
Pwr_Gnd
12
Pwr_Gnd
13
5V
14
GND
15
~Enable
16
FaultOut
17
GND
18
~SPICS/AtRest
19
SPISO
20
SPISI/Direction
21
SPIClk/Pulse
22
GND
Pin Name
Direction Description
HV
DC power to Atlas module, referenced to Pwr_Gnd. The DC power source
should be a transformer isolated power supply. For the compact Atlas package two
pins carry this signal, so care should be taken to connect both pins.
Pwr_Gnd
Power return for HV, Motor A, Motor B, Motor C and Motor D. For the compact
Atlas package two pins carry this signal, so care should be taken to connect both
pins. For greatest EMI protection double shielded cables on the motor winding A,
B, C, and D should be used with the inner shield connected to Pwr_Gnd and the
outer shield connected to chassis ground.
Motor A
Motor output pin A. Used with Brushless DC, DC Brush, and Step Motors. For the
compact Atlas package two pins carry this signal, so care should be taken to con-
nect both pins.
Motor B
Motor output pin B. Used with Brushless DC, DC Brush, and Step Motors. For the
compact Atlas package two pins carry this signal, so care should be taken to con-
nect both pins.
Motor C
Motor output pin C. Used with Brushless DC, and Step Motors. For the compact
Atlas package two pins carry this signal, so care should be taken to connect both
pins.
Motor D
Motor output pin D. Used with Step Motors. For the compact Atlas package two
pins carry this signal, so care should be taken to connect both pins.
~Enable
Input
~Enable is an active-low input. Should be tied or driven low for Atlas motor output
to be active.
FaultOut
Output
FaultOut is high impedance when active. It provides programmable fault indication,
and is low when inactive.
SPIClk/Pulse
Input
SPI input clock or Pulse signal.
Pulse is used when Atlas is set to pulse & direction signal mode, and causes a posi-
tion change command upon a high to low transition. Selection of signal interpreta-
tion for this pin is via the SPI communications bus. The default signal interpretation
is SPIClk.
SPISO
Output
SPI data master in slave out signal. It goes to high impedance when ~SPICS is high.
This pin is not used if Atlas is operating in pulse & direction signal mode.
