MASSO Documentation

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EStop Wiring

CAUTION: When installing the Pendant on MASSO Estop pin 1 must be used of the Pendant Estop button will not work. If you have a MASSO Touch move the Black wire from Estop pin 2 to Estop pin 1. If you have a MASSO G3 with existing Estop buttons move the Estop wire on Estop pin 2 to Estop pin 1.

WARNING: To avoid damage to equipment or hazard to personnel, the system installer should wire the E-Stop button so that pressing the E-Stop button disables all drives and actuators on the machine. The E-Stop relay output on the MASSO should be wired to disable the axis drives and the spindle drive circuits.

Simple one E-Stop button wiring

WARNING: It is critical that inductive loads such as Motor brakes and Relays are not connected directly to the E-Stop button circuit as doing so will cause damage to the E-Stop circuit. If you need to operate a brake or similar please connected it via the ES output using the MASSO Relay Module.

If using Touch Wiring module with external E-Stops at the Machine end only use Pin 2 on the E-Stop terminals

The below wiring example shows how to wire and use only one E-Stop button. The E-Stop button is wired to ESTOP terminal Pin 2.

In the below example E-Stop button on the MPG will not work.

Wiring only one E-Stop on MPG pendant

WARNING: It is critical that inductive loads such as Motor brakes and Relays are not connected directly to the E-Stop circuit as doing so will cause damage to the E-Stop circuit. If you need to operate a brake or similar please connected it via the ES output using the MASSO Relay Module.

If using a Pendant please use one of the connection methods shown below.
The below wiring example shows how to wire and use only the E-Stop button on the MPG pendant.
Pin 1 on the ESTOP terminal is wired to positive of the power supply to get the MPG E-Stop button working.

Wiring multiple E-Stop buttons and MPG pendant E-Stop button

The below wiring example shows how to wire and use multiple E-Stop buttons and MPG pendant E-Stop button.
All E-Stop buttons are wired in series to Pin 1 on the ESTOP terminal through the positive of the power supply.
When any of the three external E-Stop buttons or MPG pendant E-Stop button is presses, MASSO will display an E-Stop alarm on the screen and the "ES" (E-Stop output) singnal will go LOW.
The diagram below shows how the Pendant Estop relates to the Estop 1 & Estop 2 connectors.

Wiring E-Stop output signal to relay

A special output signal "ES" (E-Stop output) is available on the outputs terminal. This output is internally hardwired to the E-Stop button signals and goes LOW when the E-Stop button is pressed.

The output voltage of this output is 2.3 volts and drops to 0v when the Estop button is pressed. This means that the Estop relay is permanently on when the Estop is released and the relay turns off when the Estop is pressed. This provides fail safe operation.
This output is used to control a relay and then the relay disables all drives and actuators on the machine. The user should not rely on the software to stop the axis, spindle or other actuators in case of an emergency and must disable all drives electrically.
The normal state of the ES Relay is energized when the machine is not in an EStop condition.
Multiple relays can be used if you need more than 1 set of relay contacts
Up to 2 MASSO relay inputs can be connected to the ES output however if you require more than 2 relays connect them as shown below.
You can connect multiple MASSO Relays together as shown. Use this method of wiring if you require 3 to 5 relay outputs. Relay 1 is connected to the ES output on MASSO and the Output of Relay 1 will operate all other relays.
A single 3.3K 1/4 Watt resistor will work to operate 2 to 5 relays on the same MASSO Relay Module.
The Estop relay is independent of MASSO control and is turned on and off via the Estop buttons. This ensures that no matter the controller state pressing the Estop button will bring anything disabled by the Estop relay will immediately stop. This is why it is important to wire devices that must stop operation on an Estop press through an Estop relay contact and not rely on software control the halt operation. These include motor drives both axis and spindle, Lasers, Plasma Arc on/off and other equipment which require to be turned off immediately in an emergency situation.

INFORMATION: MASSO Relay Module information is available here: MASSO Relay Module

Caution: The disable methods for the devices in the diagram below are for demonstration purposes only, to show various connection methods. Please consult your user manual for the correct method to disable and enable your device.

INFORMATION: Plasma users can route the Plasma on off through an Estop relay contact to add additional safety ensuring that the plasma ARC cannot be started when the Plasma is in Estop and that in the case of Estop being pressed during cutting that the Plasma ARC is turned off independently of the controller.

WARNING: If you are disconnecting mains power in an EStop situation it is highly recommended that you do not run the mains through the MASSO Relay. Use the relay to operate a separate relay located elsewhere in the control cabinet. This is so that you are not mixing Low voltage signal and Mains voltages on the same board as this can lead to accidents. It is best practice to keep your mains voltage circuits separate and physically protected against accidental contact by the user.

This video explains the EStop switch install process

Troubleshooting

Use a normally closed switch contact when wiring your Estop as this makes the Estop failsafe. If the wire to the switch breaks it will Estop the machine until it is fixed ensuring safe operation.
The Estop show High in the F1 screen when the Estop is released and changes to Low when the Estop is operated

Ensure that the Estop input is not inverted in the F1 screen. If your Estop is inverted select the input and press the spacebar to toggle between Yes & No
If using the MASSO Pendant use Estop 1 instead of Estop 2 or the Estop on the pendant will not work.
If you have wired your MASSO to use the Estop on a pendant, unplugging the pendant will put the machine into Estop until the Pendant is plugged back in.
If you have multiple Estop buttons and you cannot get your machine out of the Estop, check each button to make sure they have all been released.
When troubleshooting the Estop with a multimeter you should measure the MASSO power supply voltage on Estop2 when the Estop button is released and 0 volts when the Estop button is operated. This is true even when you have a Pendant installed.
When troubleshooting the Estop with a MASSO pendant installed you should measure MASSO power supply voltage on Estop1 and Estop2 when all Estop buttons are released. If an external Estop button is operated you should measure 0v on Estop 1 and Estop 2. If the External Estop button is released and the Pendant Estop is pressed you should measure MASSO power supply voltage on Estop1 and 0v on Estop 2.