MASSO Documentation

 
 Spanish  French  German  Simplified Chinese
Select Language   
 
 

E-Stop Wiring

Pin 1 - E-Stop Signal: To be used when using MPG E-Stop pendant 

 

Pin 2 - E-Stop Signal 

 

 

CAUTION: When installing a MASSO Pendant, Estop pin 1 must be used or the pendant Estop button will not work. For MASSO Touch: move the black wire from Estop pin 2 to Estop pin 1 For MASSO G3 with existing Estop buttons: move the Estop wire from pin 2 to pin 1

 

WARNING: To avoid damage to equipment or risk to personnel, the system installer must wire the Estop so that pressing it disables all drives and actuators on the machine. The Estop relay output on MASSO must be wired to disable: Axis drives Spindle drive circuits

 

Simple Single E-Stop Wiring

 

WARNING: Inductive loads such as motor brakes and relays must not be connected directly to the Estop circuit, as this will damage the circuit. If a brake or similar device is required, connect it via the ES output using a MASSO Relay Module. If using a Touch Wiring Module with external Estops at the machine end, only use Pin 2 on the Estop terminals. This example shows wiring for a single Estop button connected to ESTOP terminal Pin 2. Note: In this setup, the Estop button on the MPG pendant will not function.

 

 

 

 

 

Wiring Only One E-Stop on MPG Pendant

 

 

WARNING: Inductive loads must not be connected directly to the Estop circuit. Use the ES output with a MASSO Relay Module.

 

This example shows multiple Estop buttons and a pendant Estop:

 

  • All Estop buttons are wired in series to Pin 1 on the ESTOP terminal through the positive power supply

 

 

Operation:

 

  • Pressing any Estop button or the pendant Estop will:

    • Trigger an Estop alarm on MASSO

    • Set the ES (Estop output) signal LOW

 

 

The diagram also shows how the pendant Estop relates to Estop 1 and Estop 2 connectors.

 

 

 

 

Wiring E-Stop Output Signal to Relay

The ES (Estop output) signal is available on the outputs terminal.


It is internally linked to the Estop circuit and goes LOW when the Estop is pressed.

 

 

 

Output behaviour

 

  • Output voltage is 2.3V when Estop is released

  • Drops to 0V when Estop is pressed

 

 

This means:

 

  • The relay is ON when Estop is released

  • The relay turns OFF when Estop is pressed

  • This provides fail-safe operation

 

Important notes

  • The ES output must control a relay that disables all drives and actuators

  • Do not rely on software to stop motion in an emergency

  • The Estop relay operates independently of MASSO control

 

Devices that must be disabled include:

  • Axis motor drives

  • Spindle drives

  • Lasers

  • Plasma systems

  • Any equipment requiring immediate shutdown

 

Multiple relay setup

 

  • Up to 2 MASSO relay inputs can connect directly to the ES output

  • For more relays:

    • Use Relay 1 driven by ES output

    • Relay 1 output drives additional relays

  • Use a 3.3K 1/4 Watt resistor to operate 2 to 5 relays on the same MASSO Relay Module

 

 

INFORMATION: MASSO Relay Module information is available in the MASSO Relay Module

 

CAUTION: The device disable methods shown in diagrams are examples only. Always refer to your device manual for correct wiring.

 

 

 

 

 

INFORMATION: Plasma on/off can be routed through an Estop relay contact to: Prevent arc start during Estop Ensure arc shuts off immediately during an Estop event

 

WARNING: If disconnecting mains power during Estop: Do not run mains power through the MASSO Relay, use the MASSO Relay to control a separate external relay This prevents mixing low voltage and mains voltage on the same board and improves safety.

 

 Video explanation - EStop switch install process

 

 

 

Troubleshooting

  • Use a normally closed switch for fail-safe operation

  • If wiring breaks, the machine will enter Estop

     

Expected behaviour

 

  • Estop shows High when released

  • Changes to Low when pressed

Checks

  • Ensure Estop input is not inverted in the F1 screen

  • If inverted, toggle the setting using the spacebar

  • If using a MASSO Pendant:

    • Use Estop 1, not Estop 2

    • Unplugging the pendant will trigger Estop

  • If using multiple Estop buttons:

    • Ensure all buttons are released

Multimeter testing

Without pendant:

 

  • Estop 2 reads power supply voltage when released

  • Estop 2 reads 0V when pressed

 

 

With pendant installed:

 

  • Estop 1 and Estop 2 both read power supply voltage when released

 

 

If external Estop is pressed:

 

  • Estop 1 = 0V

  • Estop 2 = 0V

 

 

If external Estop is released and pendant Estop is pressed:

 

  • Estop 1 = power supply voltage

  • Estop 2 = 0V

 

 

 

 

Last Updated On 22 May, 2026

© 2026, All Rights Reserved | Privacy Policy.

CONTENTS