SimpleMotion V2 port

From Granite Devices Knowledge Wiki
Revision as of 21:33, 13 December 2012 by Tero K (Talk | contribs) (Electrical properties)


Jump to: navigation, search
RJ45 cable compatible with Ethernet and SimpleMotion V2

SimpleMotion V2 communication link and Argon drives use RJ45 connectors and cables as physical connection standard.

RJ45 is well known from Ethernet connectors and same cables may be used with SimpleMotion wiring.

Electrical properties

SimpleMotion V2 uses RS485 electrical serial communication standard for all data transfer. Some main benefits of using RS485 are:

  • Multidrop buses possible (up to 32 devices in single serial link)
  • High reliability due to differential signaling
  • High data rates and long cable lengths possible
  • Easy to interface even from smallest microcontrollers with UART
  • Low wire count, only 2 signal wires + ground needed
  • Bidirectional data transfer (receive & transmit) in one wire pair

As default SimpleMotion V2 uses 460800 BPS bitrate.

Use as E-stop input

SM V2 multidrop bus with E-stop functionality
In Argon drive, the same connector acts also as emergencecy stop or Safe torque off input. User may connect a e-stop button directly at the end of device chain to gain reliable stopping mechanism for all linked devices.

Connector pinout

RJ45 cable pinout
Pin # Signal name Description
1 CANL (reserved) CAN bus possibility for future use
2 CANH (reserved) CAN bus possibility for future use
3 RS485_A RS485 signal A
4 Reserved Do not connect
5 E_STOP Connect normally closed E-stop button switch between pins 5 and 8
6 RS485_B RS485 signal B
7 Reserved Do not connect
8 GND Ground reference for RS485 and E_STOP

In no event the Product Information or parts hereof shall be regarded as guarantee of conditions or characteristics. The Product Information or any part thereof may also not be regarded as a warranty of any kind. No liability of any kind shall be assumed by Author with respect to Product Information or any use made by you thereof, nor shall Author indemnify you against or be liable for any third party claims with respect to such information or any use thereof.

As content of this Wiki may be edited by user community, Granite Devices Oy or it's affiliates do not take any responsibility of the contents of this Wiki. Use information at your own risk. However, Granite Devices staff attempts to review all changes made to this Wiki and keep information trustworthy.

Without written consent, Granite Devices' Products or Intellectual Property shall not be used in situations or installations where living beings, material property, or immaterial property could be harmed by the operation, features or failures of Product. Products may only be used in a way where hazards like moving parts, electric shock, laser radiation, or fire can't be realized even if the content of this Wiki would suggest otherwise.