Argon user guide/J5 connector electrical interfacing

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Revision as of 14:19, 17 August 2013 by Tero K (Talk | contribs) (High speed digital input group)


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This article explains the internal circuity behind J5 connector of Argon servo drive.

J5 connector pin-out and electrical ratings

Pin groups

Internal schematics of pin groups

These images show the circuity behind the J5 connector inside the Argon drive (simplified schematics). Left side end represents J5 pins and right side continues to drive internal circuity.

Supply

Supply pins output a regulated 5V voltage to external circuits. GND pin is tied to J3 connector V- terminal.

Electrical properties
  • Output voltage 4.9-5.2 V
  • Maximum load 500 mA
  • Maximum injected current -10 mA

High speed digital input group

HSIN is differential digital input capable of receiving digital signals up to 4 MHz.

Electrical properties

  • Maximum voltage to HSINx+/- pins referenced to GND: -0.5 to 6V. Nominal 3.3 or 5.0V.
  • Maximum injected current +/- 10 mA
  • When negative input (HSINx-) is left floating, it floats around 2.5V
  • Input state is logic 1 when voltage on positive pin is greater than voltage on negative pin, otherwise it's logic 0

Wiring when driving using differential source

  • Positive outputs of source to HSINx+
  • Negative outputs of source to HSINx-
  • GND must be connected to source ground

Wiring when driving using single ended source (TTL, CMOS or open collector)

  • Outputs of source to HSINx+
  • Leave HSINx- floating
  • GND must be connected to source ground

Analog input group

Analog input accepts ±10V from and may be used as setpoint signal.

Electrical properties
  • Input impedance ~10 kΩ
  • Maximum ANAINx+/- pin voltage vs GND ±20V
  • Maximum injected current ±10 mA
  • Sampling resolution 12 bits
Wiring to differential signal source
  • Connect positive output to ANAINx+
  • Connect negative (inverted) output to ANAINx-
  • Connect source ground to GND
Wiring to single ended signal source
  • Connect output to ANAINx+
  • Connect source ground to ANAINx-
  • Connect source ground to GND

Digital output group

Digital output is an optoisolated transistor output to drive various types of inputs of target devices (logic gates, relays, lights etc)

Electrical properties
  • Load voltage range 3-24V
  • Maximum allowed load 50 mA
  • Logic 1 state equals conducting state of optocoupler transistor (current flows from GPO+ to GPO- pins), logic 0 stops current flow between GPO+ to GPO- pins.
  • + to - pin voltage drop at 50 mA less than 2 VDC
Wiring to logic gate input (CMOS or TTL)
  • Connect GPO+ pin to target VCC (typ 5V)
  • Connect GPO- pin to target input pin (so input pin is pulled to 5V when output state is logic 1)

Digital input group

Connection from electromechanical switch or relay to isolated digital input. PSU may be external power supply or 5V supply from J5 connector.

Digital inputs are optoisolated (floating potential) inputs for general purpose control signals.

Electrical properties
  • Signal voltage range 3-24V
  • Logic 0 when difference between +/- inputs less than 1.5V, logic 0 when more than 2.9V
  • Current needed to drive logic 1 is 0.8-9 mA depending on input voltage
  • Maximum voltage difference between GPIx+/- inputs 27 VDC
  • Maximum voltage difference between GPIx+/- inputs vs GND 120 VDC
Connection to electromechanical switch or relay
  • See schematics image in right side
Connection to CMOS source
  • Connect source output to GPIx+ input
  • Connect source ground to GPIx- input
Connection to open collector or TTL source
  • Connect source output to GPIx- input
  • Connect source VCC (typ 5V) to GPOx+ input

Examples

Wiring axis limit and home switches to J5

A way to connect switches to J5 port. Inputs are supplied by the J5 connector 5V output. Alternatively the switches may be also supplied from an external 5-24VDC supply.

To operate the motor, limit switches must be connected to the GPI1 and GPI2. Feeding logic 1 to one of these ports enables axis motion feed in certain direction.

The behavior of feed enable signals can be configured via Granity machine tab. Logic 1 to these pins is required for drive operation:

  • GPI1 - enable positive direction feed.
  • GPI2 - enable negative direction feed.

Home switch (optional):

  • GPI3 - home switch input. Polarity can be configured via Granity.

Pulse and direction setpoint

This example shows how to wire J5 for typical pulse and direction control.

TODO


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