• Allow only one actuating control to initiate a machine cycle or function when the enabling device is in use, in order to prevent unex-
pected machine function.
• Require each selected enabling device to concurrently operate before a machine cycle or function can be initiated.
• Cause an immediate stop of the machine or function when the enabling device is released or fully squeezed. The enabling device(s)
must be re-actuated for the actuating control to be allowed to re-initiate a machine cycle or function.
The means of returning the machine control to automatic or production mode must e located outside the hazard zone, such that it can not
be reached from within the hazard zone, and the reset procedure can not be allowed to occur until the hazard zone is clear of individuals
and all safeguards are reestablished (in place and functioning).
Consideration for Reset Switches
The safeguarding device (or safety system) reset switch (if used) must be accessible only from outside, and in full view of, the hazardous
area. Reset switches must also be out of reach from within the safeguarded space, and must be protected against unauthorized or inad-
vertent operation (e.g., through the use of rings or guards). If any areas are not visible from the reset switch(es), additional means of
safeguarding must be provided.
WARNING: Reset Routine Required
U.S. and international standards require that a reset routine be performed after clearing the cause of a
stop condition (e.g., arming an E-stop button, closing an interlocked guard, etc.).
Allowing the machine
to restart without actuating the normal start command/device can create an unsafe condition
which could result in serious injury or death.
Connection of Multiple Switches
Multiple enabling devices connected to one safety module must be series connected (see wiring diagram and the following warning).
WARNING: Multiple Switching Devices
Whenever two or more devices are connected to the same safety module (controller):
•
Contacts of the corresponding pole of each switch must be connected together in series.
Never
connect the contacts of multiple switches in parallel.
Such a parallel connection defeats the switch
contact monitoring ability of the Module and creates an unsafe condition which could result in serious
injury or death.
•
Each device must be individually actuated (engaged), then released (or re-armed) and the safe-
ty module reset.
This allows the module to check each switch and its wiring to detect faults.
This check must be performed during the prescribed checkouts.
Failure to test each device individually
in this manner could result in undetected faults and create an unsafe condition which could result
in serious injury or death.
Normally Open Momentary Pushbutton (on Some Models)
Models with the momentary switch option may be used to control a machine function, as an inch/jog button, or as a hold-to-run control.
Only one actuating control (e.g., the pushbutton) can initiate the machine function while the enabling device(s) is in use. To prevent
unexpected machine function, the machine control must disable all other actuating controls such that the individual operating the enabling
device has exclusive control.
Hold-to-run control initiates and maintains machine functions only as long as the pushbutton is actuated; release of the pushbutton must
initiate an immediate stopping command. For hold-to-run applications, both the three-position switch and the momentary N.O. switch
must be continually engaged to allow machine operation. If multiple individuals are within the cell or exposed to the hazard, only a single
individual can be in command of the hold-to-run control or the means to initiate machine operation.
ED1G Enabling Switch
6
www.bannerengineering.com - tel: 763-544-3164
P/N 151822 Rev. B
