Editing SimpleMotion V2 port

[[File:multidrop_estop.png|thumb|500px|SM V2 multidrop bus with E-stop functionality]]
[[File:Ethernet_RJ45_connector_p1160054.jpg|thumb|RJ45 cable compatible with Ethernet and SimpleMotion V2]]
[[SimpleMotion V2]] communication link and [[Argon (servo drive)|Argon]] drives use [http://en.wikipedia.org/wiki/Modular_connector#8P8C RJ45] connectors and cables as physical connection standard.

RJ45 is well known from Ethernet connectors and same cables may be used with SimpleMotion wiring.
==Bus properties==
SimpleMotion V2 uses [[Wikipedia:RS485|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 [[Wikipedia:Universal_asynchronous_receiver/transmitter|UART]]
* Low wire count, only 2 signal wires + ground needed
* Bidirectional data transfer (receive & transmit) in one wire pair
* Cabling with standard RJ45 Ethernet cables
As default SimpleMotion V2 uses 460800 BPS bitrate and can deliver over 10 000 motion commands per second.
{{damage|Don't use [http://en.wikipedia.org/wiki/Ethernet_crossover_cable crossover] cables in SimpleMotion V2 system}}
==Using SMV2 port as E-stop & Enable input==
In SMV2 compatible drives, the SMV2 connector acts also as emergency 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.
===Wiring with [[SMV2BRK]]===
[[File:Smv2kit m.jpg|thumb|[[SimpleMotion V2 USB adapter|SMV2USB]] adapter and [[SMV2BRK]] bus termination board]]
The preferred method to wire STO and Enable signals to SM bus is to add a [[SMV2BRK]] break out board at the end of bus chain. SMV2BRK acts as RS485 termination resistor and a wire terminal for STO and Enable signals with easy interfacing to switches.

For commissioning of SMV2BRK, see it's dedicated [[SMV2BRK|SMV2BRK page]].
===Wiring with [[IONICUBE]] devices===
IONICUBE motherboards have on broad routing from RJ45 connector to user accessible wire terminals. When using these motherboards, see [[IONI & IONICUBE user guide]] for wiring.

===Wiring with bare RJ45 cable===
To terminate SMV2 bus and connect switches without SMV2BRK, see [[SimpleMotion V2 termination with bare cable]].