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Use of a common key further
enhances safety and prevents operators from being trapped inside the
hazardous area.
Because the A22TK Safety Key Selector Switch uses the same key as the
Guard Lock Safety-door Switch, the operator is prevented from forgetting
to remove the key. The result is a safer working environment when
performing maintenance.
"Total safety support including device startup prevention at maintenance
time" that only OMRON can provide
OMRON's full line of safety components includes the Safety Key Selector
Switch and Guard Lock Safety-door Switch, as well as the Enabling Grip
Switch, which is essential for making emergency stops when performing
teaching.
A pre-packaged maintenance mode circuit makes it easy to create a safety
circuit, contributing to the total safety of operators.
Common Key for Door Switch and Selector Switch
*To unify keys, specify the same key type.
Broad range of applications include use with door locks, mode switching,
and emergency stops when teaching
With the Selector Switch, it is possible to switch between normal
operation mode (use of Door Switch is available) and maintenance mode (use
of Enabling Grip Switch is available).
Previous Issues
(without A22TK)
Safety can be ensured, but there is a risk
of human error occurring during operation.
Case 1:
Guard Lock Safety-door Switch only
When only the Door Switch is used, the operator is at risk of being shut
inside the barrier if, for example, he/she forgets to remove the trapped
key and a third party locks the door. The equipment may also be started up while
the operator is inside.
Assumed risks:
• Forget to remove the key
• Being trapped inside
• Starting equipment
Case 2:
Guard Lock Safety-door Switch + Key Selector Switch (A22K)
The safety level is enhanced by switching to maintenance mode. However,
because two different types of keys are required, the operator is still at
risk of being shut inside if he/she forgets to remove the trapped key.
Different keys
Assumed risks:
• Forget to remove the key
• Being trapped inside
Omron Solutions With A22TK
By using a common key, the risk of human error is reduced in operations
from when the door is open/shut until the equipment is started.
Guard Lock Safety-door Switch + Safety Key Selector Switch (A22TK)
The two locks on the door and equipment use the same key, reducing the
likelihood that the user will forget to remove it. In addition, the key
cannot be removed when maintenance is being performed. This prevents the
key from being lost and greatly reduces the risk of an operator becoming
trapped inside.
Furthermore, by using the to detect the presence of operators, equipment
malfunctions can be prevented when operators are inside, enabling a higher
safety level.
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