DANGER
Hazard due to lack of effectiveness of the protective device
In the event of a voltage drop, the safety locking device unlocks regardless of whether
the dangerous state of the machine has ended.
b
Assess the risk of accident. Use for protecting people requires correct project plan‐
ning.
3.2.2
Locking device monitoring
All variants feature at least 1 positive opening normally closed contact for locking
device monitoring. The output state changes when locking or unlocking the locking
device.
3.2.3
Door monitoring
All versions feature at least 2 contacts for door monitoring. At least 1 contact is a posi‐
tive opening normally closed contact. Depending on the product variant, 1 contact can
be a normally open contact. The output state changes when opening or closing the pro‐
tective device.
3.3
Symbols on the product
Table 1: Symbols on the product
Symbol
Meaning
Positive opening normally closed contact for locking device moni‐
toring
Positive opening normally closed contact for door monitoring
Mechanical unlocking mechanism actuated, safety locking device
unlocked
Mechanical unlocking mechanism not actuated, safety locking
device functions normally
3.4
Manual unlocking
In some situations, it necessary to unlock the locking device manually (e.g. is faults are
present). After unlocking, a function test must be performed.
Mechanical unlocking mechanism
With the mechanical unlocking mechanism, the safety locking device can be unlocked
regardless of the status.
When actuating the mechanical unlocking mechanism, the contacts for locking device
monitoring open. A stop command must be generated.
Actuating the mechanical unlocking mechanism
b
Ensure tensile stress is not applied on the actuator.
b
Loosen safety screw with the screwdriver.
b
Use the screwdriver to rotate the mechanical unlocking mechanism in the direc‐
tion of the arrow to the following symbol:
✓
The locking device is unlocked.
PRODUCT DESCRIPTION
3
8020548/ZT59ZT59/2019-01-17 | SICK
O P E R A T I N G I N S T R U C T I O N S | i15 Lock
9
Subject to change without notice
