ATOMI connectors and pinouts

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Legend

Color
Supply pin
Input pin
Output pin

MX, MY, MZ, MA - Motor and encoder connectors

Pin number Signal name Usage Notes / Specifications
1 SW Limit switch, shared for both directions Internal 2.2 kOhm pull-up resistor
2 CHC / Homeswitch Encoder channel C (index) / homeswitch Internal 2.2 kOhm pull-up resistor
3 CHB Encoder channel B Internal 2.2 kOhm pull-up resistor
4 CHA Encoder channel A Internal 2.2 kOhm pull-up resistor
5 +5 V 5 V supply voltage to encoder Total 1.5 A current limit for +5 V bus
6 GND Encoder supply ground / 0 V Also ground for cable shield
7 PH4 Motor phase 4 Stepper motor: Coil B.2, Brush DC motor: Armature +
8 W / PH3 Motor phase 3 / AC/BLDC motor phase W (T) Stepper motor: Coil B.1, Brush DC motor: Armature -
9 V / PH2 Motor phase 2 / AC/BLDC motor phase V (S) Stepper motor: Coil A.2, Brush DC motor: Armature -
10 U / PH1 Motor phase 1 / AC/BLDC motor phase U (R) Stepper motor: Coil A.1, Brush DC motor: Armature +

X1 - Granity and SimpleMotion V2 connector

X2 - Main setpoint connector

X2 is main control and setpoint signal port consisting Global Enable input signal, Global Fault output signal, pulse and direction/PWM setpoint inputs, and digital outputs for servo ready signals. X2 is directly wired to conform most common parallel port style pulse & direction CNC controllers.

Pin number in header Pin number in D25 cable Signal name Typical usage Notes / Specifications Pin number in header Pin number in D25 cable Signal name Typical usage Notes / Specifications
1 1 ENABLE P Enable all axis Active low 2 14 Homing Start homing for all axis Active low
3 2 HSIN2_X Direction input X Direction input for PWM D 4 15 Global_GPO3 P Global fault output Active low
5 3 HSIN1_X Pulse/step input X PWM setpoint 6 16 PWM2ANA PWM to analogue converter input Frequency must be 100 - 10000 Hz
7 4 HSIN2_Y Direction input Y Direction input for PWM D 8 17 AUX_IN Auxilary transistor input Gate for open-drain buffer
9 5 HSIN1_Y Pulse/step input Y PWM setpoint 10 18 GND Ground / 0 V -
11 6 HSIN2_Z Direction input Z Direction input for PWM D 12 19 GND -
13 7 HSIN1_Z Pulse/step input Z PWM setpoint 14 20 GND -
15 8 HSIN2_A Direction input A Direction input for PWM D 16 21 GND -
17 9 HSIN1_A Pulse/step input A PWM setpoint 18 22 GND -
19 10 GPO1_X P X axis servo ready signal Active low 20 23 GND -
21 11 GPO1_Y P Y axis servo ready signal Active low 22 24 GND -
23 12 GPO1_Z P Z axis servo ready signal Active low 24 25 GND -
25 13 GPO1_A P A axis servo ready signal Active low 26 N/A GND Internally connected to GND

Notes:

  • All inputs are logic HIGH with input voltage from 2.7 V to 5 V.
  • All outputs source 3.3 V with maximum of 8 mA load.

D) PWM can be used with or without direction signal. Without direction signal 50 % PWM = zero setpoint.

P) Internal 10 kOhm pull-up resistor.

X3 - Additional setpoint and IO connector

X3 is a second control and setpoint signal port addition to X2. X3 consists of analog setpoint signal inputs and additional digital I/O.

Pin number in header Pin number in D25 cable Signal name Typical usage Pin number in header Pin number in D25 cable Signal name Typical usage
1 1 GND GND / 0 V 2 14 +5V +5 V supply
3 2 GND GND / 0 V 4 15 Global_IO4 Global IO 4
5 3 AUX_OUT 1 Buffered output for AUX_IN 6 16 ANA_OUT PWM to analogue converter output, 0 to 5 V
7 4 X_GPI2 P Enable positive X travel 8 17 X_GPI3 P Enable negative X travel
9 5 X_GPO4 X position within limits 10 18 X_GPO2 X tracking error
11 6 X_ANAIN X analogue setpoint input 12 19 Y_GPI2 P Enable positive Y travel
13 7 Y_GPI3 P Enable negative Y travel 14 20 Y_GPO4 Y position within limits
15 8 Y_GPO2 Y tracking error 16 21 Y_ANAIN Y analogue setpoint input
17 9 Z_GPI2 P Enable positive Z travel 18 22 Z_GPI3 P Enable positive Z travel
19 10 Z_GPO4 Z position within limits 20 23 Z_GPO2 Z tracking error
21 11 Z_ANAIN Z analogue setpoint input 22 24 A_GPI2 P Enable positive A travel
23 12 A_GPI3 P Enable negative A travel 24 25 A_GPO4 A position within limits
25 13 A_GPO2 A tracking error 26 N/A A_ANAIN A analogue setpoint input

Notes:

  • All inputs are logic HIGH with input voltage from 2.7 V to 5 V.
  • All GPO pins source 3.3 V with maximum of 8 mA load.

1) Open-drain buffer with 24 V 500 mA maximum rating. Active when AUX_IN = HIGH.

P) Internal 10 kOhm pull-up resistor.

X4 - Power input and STO connector

X4 is three pin wire terminal for HV DC bus supply and Safe torque off.

Pin number Signal name Usage Electrical
1 GND Ground
2 STO Safe torque off 3.3 - 49 V
3 HV+ Motor power supply, HV DC bus 12 - 49 V

JP1 to JP4 - Encoder passthrough connector

JP1 to JP4 are pin headers for external encoder use.

Pin number Signal name Usage
1 +5V +5 V supply
2 CHA Encoder channel A
3 GND GND / 0 V
4 CHB Encoder channel B
5 GND GND / 0 V
6 CHC Encoder channel C

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