Omron G9SX User Manual page 96

Safety Precautions
<Precautions for All G9SX Models>
Serious injury may possibly occur due to breakdown
of safety outputs.
Do not connect loads beyond the rated value to the
safety outputs.
Serious injury may possibly occur due to loss of
required safety functions.
Wire G9SX properly so that supply voltages or
voltages for loads do NOT touch the safety inputs
accidentally or unintentionally.
Serious injury may possibly occur due to damages of
safety inputs.
Apply protection circuitry against back electromotive
force in case connecting inductive loads to safety
outputs.
Serious injury may possibly occur due to loss of
safety functions. Use devices appropriate for the
application and the condition where G9SX is used.
Control Devices
Emergency Stop Switches
Door interlocking switches or
limit switches.
Safety Sensors
Relays with forcibly guided
contacts
Contactors
Other devices
G9SX
96
USER'S GUIDE
!WARNING
Requirements
Use approved devices with Direct Opening
Mechanism complying with IEC/EN 60947-
5-1.
Do not connect an Emergency Stop Switch
to the G9SX-GS@.
Use approved devices with Direct Opening
Mechanism complying with IEC/EN 60947-
5-1 and capable of switching micro loads of
24VDC, 5mA.
Use approved devices complying with the
relevant product standards, regulations and
rules in the country where it is used.
Consult a certification body to assess that
the entire system satisfies the required
safety category level.
Use approved devices with forcibly guided
contacts complying with EN 50205.
For feedback purpose use devices with
contacts capable of switching micro loads
of 24VDC, 5mA.
Use contactors with forcibly guided
mechanism to input the signal to Feedback/
Reset input of G9SX through the NC
contact of the contactor.
For feedback purpose use devices with
contacts capable of switching micro loads
of 24VDC, 5mA.
Failure to open contacts of a contactor
cannot be detected by monitoring its
auxiliary NC contact without forcibly guided
mechanism.
Evaluate whether devices used are
appropriate to satisfy the requirements of
safety category level.
<G9SX-GS@>
Serious injury may possibly occur due to loss of
safety functions. Construct an appropriate safety
system as shown in the following table.
Switching
function
Safety Sensor A
Safety system
configuration
Area A
example
Safety Sensor B
(1) Select Safety Sensors that satisfy the following
condition:
1. Diameter of the smallest detectable object <
Diameter of the object to be detected.
(2) Install the Safety Sensors so that they satisfy the
following conditions:
1. Use Safety Sensor A to detect the entry of the
machine into area A, and Safety Sensor B to detect
the entry of a person into area A.
2. Make sure that the machine can reach area A only
by passing through Safety Sensor A, and that a
Safety person can reach area A only by passing through
precautions Safety Sensor B.
(3) Provide a protective structure to prevent a person from
passing completely through Safety Sensor B and
stepping into area A. If this is not possible, install a
sensor that will detect the presence of a person inside
area A and prevent the machine from being restarted
while the person is inside area A.
(4) Provide a sufficient safety distance (S1) considering
the entry speed of a person and a sufficient safety
distance (S2) considering the entry speed of the
machine. For details, refer to Safety Distance on
page 97.
Switching
function
Safety system
Safety Sensor
configuration
example
Area A
Safety Door Switch
Safety Limit Switch
(1) Select Safety Sensors that satisfy the following
condition:
1. Diameter of the smallest detectable object <
Diameter of the object to be detected.
(2) Install the Safety Sensors so that they satisfy the
following conditions:
1. Use the Safety Sensor to detect the entry of the
machine into area A.
2. Make sure that the machine can reach area A only
by passing through the Safety Sensor.
Safety
(3) Provide a protective structure to prevent a person from
precautions
stepping into area A when the door is opened. If this is
not possible, install a sensor that will detect the
presence of a person inside area A and prevent the
machine from being restarted while the person is
inside area A.
(4) Provide a sufficient safety distance (S2) considering
the entry speed of the machine. For details, refer to
Safety Distance on page 97.
(5) Position the mode selector in a location where it
cannot be operated from inside area A.
Auto switching
Machine
Person
Manual switching
Machine
Mode
selector
Person