Vista P4-S4(E), Manual, Page: 10 / 11

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P4-S4 Pendant Mach4 Manual v. 1.0
5. E-Stop switch button
5.1 E-Stop switch button in P4-S4 model
 Press E-STOP switch button to send out E-Stop signal to Mach4 application and activate
Emergency Mode in Mach4.

When the button is pressed, the switch is locked down. Twist the button to reset the button and
reset E-STOP.
5.2 E-Stop switch button in P4-S4E model
 Press E-STOP switch button to send out E-Stop signal to Mach4 application and activate
Emergency Mode in Mach4.
 The same E-stop signal is simultaneously sent out through a 2-wire loop, which can be used to
control a relay or to connect with other E-stop buttons.
 When the button is pressed and the switch is locked down, the 2-wire loop is open.
 Twist the button to reset the switch and reset E-STOP signal, and at the same time, the two
wires are connected at the switch end and form a closed loop.
 A EE box is needed as an interface to separate the 2-wire loop and USB signal.