WARNING: Qualified Personnel
Only qualified and authorized personnel who have been trained in the use of the device, and hazards as-
sociated with the task that requires the use of the device, may be allowed to operate the enabling device
and must follow safe work procedures.
Bypassing Safeguards
"Bypassing" or "overriding" a safeguarding device is the manual interruption or suspension of the normal function of a safeguard under
supervisory control. It is typically accomplished by selecting a bypass mode of operation using a key switch to facilitate machine setup,
web alignment/adjustments, robot teach, and process troubleshooting.
Minimum requirements to bypass a safeguarding device include*:
• The bypass function must be temporary.
• The means of selecting or enabling the bypass must be capable of being supervised.
• Automatic machine operation must be prevented by limiting range of motion, speed, or power (e.g., only used in inch, jog, or slow-
speed modes). Bypass mode must not be used for production.
• Supplemental safeguarding must be provided. Personnel must not be exposed to hazards.
• The means of bypassing must be within full view of the safeguard to be bypassed.
• Initiation of motion should only be through a hold-to-run type of control.
• All emergency stops must remain active.
• The means of bypassing must be employed at the same level of reliability as the safeguard.
• Visual indication that the safeguarding device has been bypassed must be provided and be readily observable from the location of
the safeguard.
• Personnel must be trained in the use of the safeguard and in the use of the bypass.
• Risk assessment and risk reduction (per the relevant standard) must be accomplished.
• The reset, actuation, clearing, or enabling of the safeguarding device must not initiate hazardous motion or create a hazardous situa-
tion.
* This summary was derived from the following and other sources: ANSI NFPA79, ANSI/RIA R15.06, ISO 13849-1 (EN954-1),
IEC60204-1, and ANSI B11.19.
WARNING: Intentional Defeat
Do not defeat the protective function
of the enabling switch. Using tape, string or other means to keep
the switch in position 2 without its being actuated by an individual
can create an unsafe condition which
could result in serious injury or death.
WARNING: Emergency Stop Functions
Do not mute or bypass any Emergency Stop device.
ANSI NFPA79 and IEC/EN 60204-1 require that
the Emergency Stop function remain active at all times.
ED1G Enabling Switch
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