Omron G9SA Manual page 14

Safety Precautions
Refer to the "Precautions for All Relays" and "Precautions for All Relays with Forcibly Guided Contacts".
! CAUTION
Turn OFF the G9SA before wiring the G9SA. Do not
touch the terminals of the G9SA while the power is
turned ON, because the terminals are charged and may
cause an electric shock.
Precautions for Correct Use
Failure Detection for Slow-starting Power Supply
When using a power supply with a long start-up time, if power is
switched on while input has been closed the internal circuits will
detect a power voltage error and the product will not operate. Apply
the voltage to the product once the voltage has reached its rated level.
Installation
The G9SA can be installed in any direction.
Wiring
• Use the following to wire the G9SA.
Stranded wire: 0.75 to 1.5 mm
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Solid wire: 1.0 to 1.5 mm
• Tighten each screw to a torque of 0.78 to 1.18 N·m, or the G9SA
may malfunction or generate heat.
• External inputs connected to T11 and T12 or T21 and T22 must be
no-voltage contact inputs.
• PE is a ground terminal.
When a machine is grounded at the positive, the PE terminal
should not be grounded.
Connector Cover
Do not remove the connector cover of the G9SA-301, G9SA-501,
G9SA-321-T @, or G9SA-TH301 unless an Expansion Unit is being
used.
Mounting Expansion Units
• Turn OFF the G9SA before connecting the Expansion Unit.
• When an Expansion Unit is being used, remove the connector
cover from the G9SA Safety Relay Unit (G9SA-301, G9SA-501,
G9SA-321-T @, or G9SA-TH301) and insert the connector of the
Expansion Unit's connector cable.
Mounting Multiple Units
When mounting multiple Units close to each other, the rated
current will be 3 A. Do not apply a current higher than 3 A.
Applicable Safety Category (EN954-1)
G9SA-series Relays meet the requirements of Safety Category 4 of
the EN954-1 standards when they are used as shown in the examples
provided by OMRON. The Relays may not meet the standards in
some operating conditions. The OFF-delay output of models
G9SA-321-T @ and EX031-T @, however, conform to Safety
Category 3.
The applicable safety category is determined from the whole safety
control system. Make sure that the whole safety control system meets
EN954-1 requirements.
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S-2, Thiru. Vi. Ka. Industrial Estate, Guindy, Chennai-600 032
Ph: 4353 8888 Mob: 99 4353 8888 (Board Line) Fax: 044 4353 7888
E-mail: info@intechchennai.com Website: www.intechchennai.com
Connecting Inputs
If using multiple G9SA models, inputs cannot be made using the
same switch. This is also true for other input terminals.
Incorrect
T11 T12
G9SA
Ground Shorts
The G9SA internal circuits have a positive thermistor (TH) built in,
which will detect ground short malfunctions (where S1 and S2 are
grounded) and 1-channel and 2-channel short malfunctions, and cut
off the safety output. If the short breakdown is repaired, the G9SA
automatically recovers.
Resetting Inputs
When only channel 1 of the 2-channel input turns OFF, the safety
output is interrupted. In order to restart when this happens, it is
necessary to turn OFF and ON both input channels. It is not
possible to restart by resetting only channel 1.
Resetting Inputs During OFF Delay Time
The G9SA-321-T operates as follows according to the reset mode
when the inputs are to be re-entered during the OFF delay time of the
G9SA-321-T :
For auto reset, after the OFF delay time has ended, the outputs will
turn OFF, and then the outputs will turn ON again.
For manual reset, after the OFF delay time has ended, the outputs will
turn OFF, and then the outputs will turn ON again when the reset is
input.
Durability of Contact Outputs
Relay with Forcibly Guided Contact durability depends greatly on the
switching condition. Confirm the actual conditions of operation in
which the Relay will be used in order to make sure the permissible
number of switching operations.
When the accumulated number of operation exceeds its permissible
range, it can cause failure of reset of safety control circuit. In such
case, please replace the Relay immediately. If the Relay is used
continuously without replacing, then it can lead to loss of safety
function.
Certified Standards
The G9SA-301/501/321-T /TH301/EX301/EX031-T
following standards.
• EN standards, certified by BG:
EN954-1
EN60204-1
EN574 (G9SA-TH301 only)
• Conformance to EMC (Electromagnetic Compatibility)
Certified by TÜV SÜD: G9SA (-TH301) 24 VAC/VDC
Certified by TÜV Rheinland: G9SA (-TH301) 100-240 VAC
EMI (Emission): EN55011 Group 1 Class A
EMS (Immunity): EN61000-6-2
• UL standards: UL508 (Industrial Control Equipment)
• CSA standards: CSA C22.2 No. 14 (Industrial Control Equipment)
• CCC Certification: GB14048.5
G9SA
T11 T12
G9SA
conform to the
G9SA-EX301/EX031-T
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