Omron CK3W-GC 00 Series Hardware User Manual page 21

When cross-wiring terminals, the total current for all the terminals will flow in the wire. When wiring
cross-overs, make sure that the current capacity of each of the wires is not exceeded.
• Do not allow wire clippings, shavings, or other foreign material to enter the Controller. Otherwise,
Controller burning, failure, or malfunctions may occur.
Cover the Controller or take other suitable countermeasures, in particular when carrying out wiring
work.
• To ensure safe use of the functions of the CK3W Units, observe the following points when wiring to
avoid the effects of the noise.
a) Use twisted-pair shielded wire for the encoder connection lines, amplifier connection lines, ana-
log input lines, Galvo Scanner connection lines, and laser connection lines.
b) Wire the encoder connection lines, amplifier connection lines, analog input lines, Galvo Scanner
connection lines, and laser connection lines separately from the AC power lines, motor power
lines, and other power lines, and do not insert into the same duct.
c) If there are noise effects from power supply lines when using the same power supply to power
an electrical welder or an electric discharge machine, or there is a high-frequency source nearby,
insert a noise filter into the power supply input section.
Power Supply Design
• In the system, only use a power supply within the rated supply capacity range specified in this man-
ual.
• Install external breakers and take other safety measures against short-circuiting and overcurrents in
external wiring.
• Do not apply voltages to the Input Units in excess of the rated input voltage.
• Do not apply voltages or connect loads to the Output Units in excess of the maximum switching ca-
pacity.
Turning ON the Power Supply
• It takes approximately several tens of seconds to enter RUN mode after the power supply is turned
ON. During that time, outputs will be OFF or the values will be as according to settings in the Unit or
slaves. Also, external communications will not be able to be performed. Implement fail-safe circuits
so that external devices do not operate incorrectly.
• Surge current occurs when the power supply is turned ON. When selecting fuses or breakers for
external circuits, consider the above precaution and allow sufficient margin in shut-off performance.
Refer to this user's manual for surge current specifications.
• Configure the external circuits so that the power supply to the digital output turns ON only after the
power supply to the Controller has turned ON.
If the power supply to the Controller is turned ON after the digital output power supply, the digital
output may suddenly malfunction when the power supply is turned ON to the Controller.
Actual Operation
• Build a program such that the Sys.Status flag is constantly monitored and safe operations are taken
if any errors occur.
CK3M-series Programmable Multi-Axis Controller User's Manual Hardware (O036)
Precautions for Safe Use
19