Editing SimpleMotion V2 termination with bare cable

[[File:multidrop_estop.png|thumb|500px|Typical SM V2 multidrop bus with E-stop functionality. In this page we instruct to eliminate SMV2BRK and connect stop-switch with bare wires.]]
[[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.
While the preferred way to terminate [[SimpleMotion V2]] bus is to use [[SMV2BRK]] break-out-board, there is also an option to do it with bare RJ45 Ethernet cable. This page instructs how to achieve proper termination.

Before proceeding, make sure you understand [[SimpleMotion V2 port]].

==Use as E-stop & Enable input==
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.

==Wiring with bare RJ45 cable==
{{damage|Pay extra attention to correct wiring in this section. Miswiring or usage of wrong type RJ45 cable (using cross-over cable instead of straight cable) are the most common reasons for damaged drives.}}
[[File:Rj45 estop and enable.png|thumb|E-stop and enable signal wiring to RJ45 cable]]
[[File:smv2_enablequickndirty.jpg|thumb|A quick'n'dirty way to make enable drive & disable [[safe torque off]] connection. May be used for testing before final wiring.]]
{{damage|SimpleMotion V2 devices use pins 3, 6 and 8 (RS485_A,RS485_B and GND) for serial communication. If something interferes these lines, communication may fail or devices may be damaged. Before powering 24V to any of the pins, ensure that pins 3 and 6 are not connected to any external circuit. It's also highly recommended to use current limited 24V power source for initial tests to reduce risk of damage (0.15-0.3A limit).}}

==Connector pinout==
{| class="wikitable"
|-
! Pin # !! Signal name !! Description || Electrical wiring
|-
| 1 || STO2_24V || STO input 2 || Supply 24VDC in this pin referenced to GND to disable STO2. <sup>1</sup>
|-
| 2 || Reserved|| Reserved for future use || Do not connect
|-
| 3 || RS485_A || RS485 signal A || RJ45 cable routes this between devices and [[SimpleMotion V2 USB adapter]]
|-
| 4 || STO1_24V || STO input 1 24V in || rowspan=2|Supply 24VDC between STO1_24V and STO1_0V to disable STO1. STO1 inputs are floating and isolated from GND. <sup>1, 2</sup>
|-
| 5 || STO1_0V || STO input 1 0V in
|-
| 6 || RS485_B || RS485 signal B||RJ45 cable routes this between devices and [[SimpleMotion V2 USB adapter]]
|-
| 7 || ENABLE_IN_24V || Drive enable control signal || Supply 24VDC in this pin referenced to GND to set drive in enabled state.
|-
| 8 || GND || Ground reference for: RS485, STO2 and ENABLE_IN || RJ45 cable routes this between devices and [[SimpleMotion V2 USB adapter]]. For enable & STO connect this to external 24V power supply ground.
|}
<sup>1</sup>) STO1 and STO2 are controlling two independent [[Safe torque off]] methods. Both must be supplied 24V simultaneously to enable torque to the motor.

<sup>2</sup>) STO1 has limited functionality on Argon if HV DC bus is shared between drives or external DC voltage is supplied. For more info, see [[Argon user guide/J4 connector wiring]].
{{damage|Even when RJ45 connector and cables are being used in Ethernet and SimpleMotion, these protocols are not electrically compatible. Never connect SimpleMotion device to Ethernet device.}}