Panasonic LP-M Series Maintenance Manual page 26

„ Construction of interlock system
For operating this product, construct the protective enclosure enclosing the range of the laser radiation for protecting
the exposure caused by the reflection of the laser radiation from the marking object or the surrounding objects, and also
construct the interlock system. The following figure shows the construction sample of the interlock system.
q
r
w
No. Description
Emergency stop button
q
Door for the maintenance
w
Safety switch
e
Laser protection shutter for marking object gateway
r
Safety relay unit or safety PLC etc.
t
To the interlock connector 1 and interlock connector 2
y
• Interlock input is connected to the operating coil of the internal relay in the controller unit.
Connect interlock inputs with the non-voltage contact (dry contact) such as a relay or a switch. Do not connect with the
voltage contact such as a transistor.
• When making a system compatible to ISO 11553-1 / ISO 13849-1, construct the redundant interlock system by using
interlock 1 and 2 connected to safety PLC or safety relay unit to shut off the laser power supply in accordance with the
standards.
26
S t o
p
e
ME-LPM-SSM-10
t
Note
Construct a control system for shutting off the laser
power when it is opened.
Construct a control system which will separate (cut off)
the laser beam or shut off the laser power when it is open.
Connect the input signals of the interlock connector
to the safety relay unit or the safety PLC relay output
terminal.
Besides the interlock connector, it can also be
connected to the laser gate terminal (LP-Mxxx-S
only) or input/output terminal signals with the safety
relay unit or the safety PLC depending on the control
specifications.
r
y