Omron ZW-C1*AT User Manual page 6

Please observe the following precautions for safe use of the products.
1. Installation Environment
• Do not use the product in environments where it can be exposed to inflammable/explosive gas.
• To secure the safety of operation and maintenance, do not install the product close to high-voltage devices
and power devices.
2. Power Supply and Wiring
• Take care when using a power supply with an overcurrent detector, because this sensor uses DC-DC
converter for its power supply circuit and inrush current may activate the protective circuit for a power supply
with an overcurrent detector.
Recommended power supply: S8VS-06024 (Omron, DC24 V 2.5 A 60 W)
• The supply voltage must be within the rated range (DC24 V ± 10 %).
• Reverse connection of the power supply is not allowed.
• Open-collector outputs should not be short-circuited.
• Use the power supply within the rated load.
• High-voltage lines and power lines must be wired separately from this product. Wiring them together or
placing them in the same duct may cause induction, resulting in malfunction or damage.
• Use adequate safety measures, for example fail-safe circuits.
• Use a specified-sized wire when wiring. Do not connect wires other than those of the specification to the
terminal block.
• For a power supply, use a DC power supply unit provided with a remedy, for example, safety ultralow voltage
circuit, to prevent a high voltage from being generated.
• Route so that power supply wires are as short as possible.
• Use a power supply dedicated for this product, without sharing it with other products.
• Tighten fixing screws securely at a torque specified in this manual.
• Before performing any of the following activities, be sure to turn off the product, or breakdown may result.
- Connecting or wiring cables
- Connecting or disconnecting connectors
- Installing or removing Calibration ROM
- When inserting or removing an EtherCAT cable, do not put any stress on the calibration ROM.
3. Grounding
• Use a frame ground terminal of the specified size to be grounded. Do not connect a wire with an only twisted
end directly to a terminal block.
- Terminal screw: M4
- Crimp-type terminal:
• Use D-type grounding (ground resistance of 100  or less). Make the ground point as close as possible and
make the ground wire used as short as possible.
• Never a ground wire with other equipment and never ground to building beams. Doing so could cause
negative impacts.
• The power supply circuit of the Sensor Controller is not insulated from the internal circuits.
• When grounding the positive (+) terminal of the 24 VDC power supply, do not connect the Sensor Controller's
frame ground terminal or PLC's frame ground terminal to ground. [(1), (2)]
The PC housing may be internally connected to the SG (0 V), in which case current will flow through the path
shown below and may cause seizure.
4
Precautions for Safe Use
8.5mm
or less
8.5mm
or less
ZW User's Manual