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5
Application Precautions
xiv
5
Application Precautions
WARNING
Always heed these precautions. Failure to abide by the following precautions
could lead to serious or possibly fatal injury.
•
Always connect to a ground of 100
Ω
or less when installing the Units. Not con-
necting to a ground of 100
Ω
or less may result in electric shock.
•
A ground of 100
Ω
or less must be installed when shorting the GR and LG ter-
minals on the Power Supply Unit.
•
Always turn OFF the power supply to the PC before attempting any of the fol-
lowing. Not turning OFF the power supply may result in malfunction or electric
shock.
•
Mounting or dismounting Power Supply Units, I/O Units, CPU Units, Inner
Boards, or any other Units.
•
Assembling the Units.
•
Setting DIP switches or rotary switches.
•
Connecting cables or wiring the system.
•
Connecting or disconnecting the connectors.
Caution
Failure to abide by the following precautions could lead to faulty operation of the
PC or the system, or could damage the PC or PC Units. Always heed these pre-
cautions.
•
Always turn ON power to the PC before turning ON power to the control sys-
tem. If the PC power supply is turned ON after the control power supply, tempo-
rary errors may result in control system signals because the output terminals
on DC Output Units and other Units will momentarily turn ON when power is
turned ON to the PC.
•
Fail-safe measures must be taken by the customer to ensure safety in the
event that outputs from Output Units remain ON as a result of internal circuit
failures, which can occur in relays, transistors, and other elements.
•
Fail-safe measures must be taken by the customer to ensure safety in the
event of incorrect, missing, or abnormal signals caused by broken signal lines,
momentary power interruptions, or other causes.
•
Interlock circuits, limit circuits, and similar safety measures in external circuits
(i.e., not in the Programmable Controller) must be provided by the customer.
•
Always use the power supply voltages specified in the operation manuals. An
incorrect voltage may result in malfunction or burning.
•
Take appropriate measures to ensure that the specified power with the rated
voltage and frequency is supplied in places where the power supply is unsta-
ble. An incorrect power supply may result in malfunction.
•
Install external breakers and take other safety measures against short-circuit-
ing in external wiring. Insufficient safety measures against short-circuiting may
result in burning.
•
Do not apply voltages to the Input Units in excess of the rated input voltage.
Excess voltages may result in burning.
•
Do not apply voltages or connect loads to the Output Units in excess of the
maximum switching capacity. Excess voltage or loads may result in burning.
•
Disconnect the functional ground terminal when performing withstand voltage
tests. Not disconnecting the functional ground terminal may result in burning.
•
Install the Units properly as specified in the operation manuals. Improper
installation of the Units may result in malfunction.
Summary of Contents for CS1 -
Page 1: ...Cat No W378 E1 1 Customizable Counter Units SYSMAC CS1 CS1W HI001 HCP22 HCA22 OPERATION MANUAL...
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Page 3: ...CS1W HIO01 HCP22 HCA22 Customizable Counter Units Operation Manual Produced January 2001...
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