KEYENCE CA-U4 - Manual

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Compact Switching Power Supply
CA-U4
Instruction Manual
Read this manual before using the product in order to achieve maximum performance.
Keep this manual in a safe place after reading it so that it can be used at any time.
Introduction
 Symbol Guide
The following symbols are used to show potentially hazardous situations or to provide
extra information. Be sure to read this section carefully.
Safety Information for CA-U4
Precautions on Regulations and Standards
 CE Marking
Keyence Corporation has confirmed that this product complies with the essential
requirements of the applicable EC Directives, based on the following specifications. Be
sure to consider the following specifications when using this product in the Member States
of European Union.
 EMC Directive (2004/108/EC)
• Applicable standard EMI: EN55011-Group 1, Class A
• Applicable standard EMS: EN61000-6-2
Remarks: These specifications do not give any guarantee that the end-product with this
product incorporated complies with the essential requirements of EMC Directive. The
manufacturer of the end-product is solely responsible for the compliance on the end-
product itself according to EMC Directive.
 Low-Voltage Directive (2006/95/EC)
• Applicable standard EN60950-1
EN50178
• Overvoltage category II
• Pollution degree 2
• The CA-U4 is designed as a Class I Equipment. Be sure to connect the protective
earthing terminal on the terminal block to the protective earthing conductor in the
building installation.
• The CA-U4 is an open-type device. Be sure to install it in an appropriate enclosure
rated as IP54 or better.
• Use the CA-U4 according to the derating conditions and the installation conditions
described in this manual.
• The CA-U4 does not include a disconnecting device. Be sure to install a
disconnecting device such as a circuit breaker in the building installation wiring.
 Precautions for UL Standards
The CA-U4 meets the following UL standards and has obtained UL and C-UL certification.
• Applicable standard UL508
Industrial Control Equipment
UL60950-1 Information Technology Equipment - Safety
CAN/CSA C22.2 No. 14-M95
Industrial Control Equipment
CAN/CSA C22.2 No. 60950-1-03
Information Technology Equipment - Safety
• UL File No. E195940, E242533
• UL category NMTR, NMTR7 / QQGQ2, QQGQ8
• Use wires that meet the following conditions for the terminal block.
(tightening torque : 1.2 N·m)
Wire range AWG#14-22
Wire Material Copper wire only
Wire type Stranded wire only
Temperature rating 60ºC/75ºC
• The CA-U4 is designed as a Class I Equipment. Be sure to connect the protective
earthing terminal on the terminal block to the protective earthing conductor in the
building installation.
• The CA-U4 is an open-type device. Be sure to install it in an appropriate enclosure rated
as IP54 or better.
• Use the CA-U4 according to the derating conditions and the installation conditions
described in this manual.
• The CA-U4 does not include a disconnecting device. Be sure to install a disconnecting
device such as a circuit breaker in the building installation wiring.
Part Names and Functions
Installation Conditions
 Installation environment
• Installation this unit indoors.
• Do not install this unit in locations exposed to direct sunlight.
• Do not install this unit in locations in which there is corrosive gas or flammable gas.
• Do not install this unit in locations exposed to a lot of dust, soot, or steam.
• Do not install this unit in locations in which water, oil, or chemicals may splash onto the unit.
• When installing this unit in a location subject to vibration or impact, consider the
vibration proof mounting.
 When installing this unit in a control console
• The ambient temperature for this unit should not exceed the upper temperature limit
(refer to the derating characteristic). When the upper temperature limit may be
exceeded, install a cooling fan or cooler so that the ambient temperature is below the
upper temperature limit.
• Leave a sufficient ventilation space around this unit for head dissipation.
• Do not install this unit just above a device with high head generation (transformer,
inverter, servo amplifier, etc.).
Installation
 Space around the unit
The CA-U4 uses natural air-cooling. To ensure sufficient convection of air to dissipate
heat, provide enough space between the CA-U4 and the control panel or other nearby
devices as shown below.
 Installation orientation
Install this unit with the base down as shown below. Do not install the unit in any other
orientation.
 Mounting bracket (optional)
Make sure that the tightening torque for the mounting screw holes of this unit is 0.5 N·m or less.
It indicates a hazardous situation which, if not avoided, could result in death or
serious injury.
It indicates a hazardous situation which, if not avoided, could result in minor or
moderate injury.
It indicates a situation which, if not avoided, could result in product damage as
well as property damage.
• Do not use this product for the purpose to protect a human body or part of
a human body.
• This product is not intended for use as an explosion-proof product. Do not
use this product in a hazardous location and/or potentially explosive
atmosphere.
• Do not perform any electrical wiring while electric current is applied.
Failure to follow this may result in an electric shock or fire.
• Be sure to connect the grounding cable. Failure to follow this may result
in an electric shock or fire.
• Do not touch this unit within 1 minute after AC input is turned off. Failure
to follow this may result in an electric shock.
• Do not modify or repair this unit. Failure to follow this may result in an
electric shock, accident, or product failure.
• Do not touch any terminal of this unit while electric current is applied. Use
the unit with the terminal cover installed to avoid an electric shock.
• When this unit is used in a system that may cause a serious accident or
damage if the unit fails, be sure to install a safety device.
• Pay attention to prevent foreign matter such as metal particles, dust,
paper or wood chips from entering the inside of this unit. Failure to follow
this may result in a fire or product failure.
• Do not touch any metallic part while electric current is applied or
immediately after input is shut off. Failure to follow this may result in a
burn due to a high temperature.
• If a failure or abnormality occurs while this unit is in use, immediately turn
off AC input and stop operation of this unit . Failure to follow this may
result in a fire or accident.
• Check that the AC input rated voltage of this unit is equal to the voltage of
the AC power supply.
• Do not connect the AC power supply to the DC output terminals.
• Do not disturb the convection of air near the vent of the casing.
WARNING
CAUTION
NOTICE
WARNING
CAUTION
NOTICE
Digital display window
Displays the current values of output current/voltage and other items.
Display mode selection (MODE)
Switches the display mode.
Output voltage adjustment trimmer (V.ADJ)
Adjusts the output voltage within the range of ±5%.
DC output terminal (+, –)
A load is connected here. (24 VDC)
Protective earthing terminal ( )
Connect to the protective earthing conductor in the building installation.
AC input terminal (N, L)
An input cable is connected here. (100 to 240 VAC)
20mm min.
20mm min.
20mm min. 20mm min.
96M13023