Precautions For Safe Use - Omron KM50 Communications Manual

Smart power monitor

Table of Contents

The following items must be observed to prevent failure to operate and malfunctions of the product

and to prevent adverse effects on performance and functions of the product.

1) Do not store, install, or use the product in the following locations.

• Locations that are greatly affected by vibration or shock

• Unstable locations

• Outdoors or locations that are subject to direct sunlight, wind, or rain

• Locations where the specified range of temperature or humidity would be exceeded

• Locations that are subject to rapid changes in temperature or humidity where

condensation or icing may occur

• Locations that are affected by static electricity or noise

• Locations that are subject to corrosive gas (particularly sulfide or ammonia gas)

• Locations that are subject to dust or iron powder

• Locations that are subject to flooding or oil

• Locations that are affected by electric or magnetic fields

• Locations that are subject to splashing brine

2) Install the product in a panel with a panel thickness of 1 to 5 mm for the KM50-C and with a

thickness of 1 to 8 mm for the KM50-E.

If a suitable panel thickness is not used or the product is installed incorrectly, the product

may come free from the mounting.

3) Do not attempt to pull the internal part of the product out of the case.

Pulling out the internal part of the product will increase the contact resistance of the

internal terminals, possibly damaging measurement accuracy.

4) Read and understand this manual before attempting to install, use, or maintain the product.

Electric shock, injury, accidents, failure, or malfunction may occur.

5) Always check the wiring and confirm that it is correct before turning ON the power supply.

Incorrect or improper wiring may result in electrical shock, injury, accidents, failure, or

malfunction.

6) Use power supplies and wires with suitable specifications for the control power supply and

the power supply for inputs and other parts of the system. Failure, burning, or electrical

shock may result.

7) Do not install the product near sources of heat, such as devices with coils or windings.

8) Check all terminal numbers before wiring.

9) Do not connect anything to unused terminals.

10)

Use crimp terminals that are suitable for M3.5 screws.

11)

Install the product well separated from devices with strong high-frequency noise (such as

high-frequency welders or sewing machines) or devices that generate surge.

12)

To prevent inductive noise, wire the lines connected to the product separately from power

lines carrying high voltages or currents. Do not wire in parallel with or in the same cable as

power lines. Other measures for reducing noise include running lines in separate ducts

and using shields.

13) Do not touch conductive metal parts on the product or the CT terminals while power is

being supplied.

14) Do not use the product for measurement on the secondary side of an inverter.

15) Do not block the ventilation holes in or the areas around the product to ensure proper

dissipation of heat.

16) Touch grounded metal to discharge any static electricity before touching the product.

17) Do not remove the terminal blocks from the product. Doing so may cause failure or

malfunction.

18) Do not continue to use the product if the front surface peels or becomes cracked.

Water may enter the product.

19) Install and suitably label a switch or circuit breaker that complies with relevant

requirements of IEC 60947-1 and IEC 60947-3 so that the operator can immediately turn

OFF the power supply.

20) When using the product in an Overvoltage Category III environment, externally install

varistors between the power supply and voltage measurement inputs to the product.

21) Use only the Special CTs and Special CT Cable specified by OMRON.

Special CTs:

Special CT Cable: KM20-CTF-CB3 (3 m)

22) The Power Monitor is a Class A product (for use in industrial environments). In residential

environment areas, it may cause radio interference. If it causes radio interference, the user

may be required to take adequate measures to reduce interference.