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Emergency Stop and Guard Switch contact functions
Posted: Wed 17 May , 2006 9:53 am
by bradders
What are the basic functions of the Emergency Stop and Guard Switch contacts, I need to problem solve an Emergency Stop activated message on my machine
Posted: Wed 17 May , 2006 9:58 am
by bradders
The following may not be 100% but it will point you in the right direction
E Stop (2 x Contacts)
E Stop Contact 1 : 24 Volts to ESR (Emergency Stop Relay)
E Stop Contact 2 : 24 Volts to Guard Switch Solenoid via GIR
(Guard Interlock Relay) (Door free to open when
24 Volts is on to solenoid)
Guard Switch (2 x Contacts)
Guard Switch Contact 1 : 0 Volts Input to Control Board (Software
monitored)
Guard Switch Contact 2 : 0 Volts to SGR (Spindle Go Relay)
Posted: Thu 18 May , 2006 16:03 pm
by Steve
Generally the E-stop circuit has 2 contacts.
One controlls the E-Stop relay which is a failsafe device. This will inhibit the spindle and axes on a machine and will also lock the door and apply the motor brakes where fitted.
The second contact goes directly to the microprocessor and indicates the machine is in E-stop and uses software to make the machine safe in addition to the hardware solution.
If You have an E-stop message on the screen but the power is applied to the machine (the hardware E-STOP can be unlatched) then the contact that is connected to the microprocessor is probably faulty. A high resistance in the E-Stop relay or Button contact block could be the cause.
The Guard circuit is again a two contact circuit. One contact is in series with the spindle enable so inhibits the spindle with the guard open and the other goes into the microprocessor so that any software interlocks can be applied.
Re: Emergency Stop and Guard Switch contact functions
Posted: Sun 21 Nov , 2021 18:42 pm
by MikeR
I have the same problem with mine . Are any of these the relays for the E stop ?
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