E2EM-X4C2 2M Omron, E2EM-X4C2 2M Datasheet - Page 14

• Manufacturer Part Number: E2EM-X4C2 2M
• Description: Extnd M12 Shd NPN-NC 4mm
• Manufacturer: Omron

Specifications of E2EM-X4C2 2M

• Maximum Operating Temperature: + 85 C
• Supply Voltage: 10 V to 40 V
• Mounting Style: Panel
• Sensing Distance: 4 mm
• Minimum Operating Temperature: - 40 C
• Features: NC
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

J MAINTENANCE AND INSPECTION
Periodically perform the following checks to ensure stable
operation of the Proximity Sensor over a long period of time.
Never disassemble or repair the Sensor.
J ENVIRONMENT
Water Resistance
Do not use the Proximity Sensor underwater, outdoors, or in the
rain.
Operating Environment
Be sure to use the Proximity Sensor within its operating ambient
temperature range and do not use the Proximity Sensor outdoors
so that its reliability and life expectancy can be maintained.
Although the Proximity Sensor is water resistive, a cover to
protect the Proximity Sensor from water or water-soluble
machining oil is recommended so that its reliability and life
expectancy can be maintained.
Do not use the Proximity Sensor in an environment with chemical
gas (e.g., strong alkaline or acid gasses including nitric, chromic,
and concentrated sulfuric acid gases).
J CONNECTING LOAD TO DC 2-WIRE
Refer to the following before using DC 2-wire Proximity Sensors.
Surge Protection
Although the Proximity Sensor has a surge absorption circuit, if
there is any machine that has a large surge current (e.g., a motor
or welding machine) near the Proximity Sensor, connect a surge
suppressor to the machine.
E2EM
1. Check for mounting position, dislocation, looseness, or
2. Check for loose wiring and connections, improper contacts,
3. Check for attachment or accumulation of metal powder or
4. Check for abnormal temperature conditions and other
5. Check for proper lighting of indicators (for models with a set
SENSOR
distortion of the Proximity Sensor and sensing objects.
and line breakage.
dust.
environmental conditions.
indicator.)
Countermeasures Against Leakage Current
Connect a bleeder resistor as the bypass for the leakage current
so that the current flowing into the load will be less than the load
reset current.
Refer to the following to calculate the bleeder resistance and the
allowable power of the bleeder resistor.
Leakage Current
When the Proximity Sensor is OFF, the Proximity Sensor has
leakage current. In this case, the load is imposed with a small
voltage and the load may not be reset. Before using the Proximity
Sensor, make sure that this voltage is less than the load reset
voltage.
R ≦ V
P > V
P:
power capacity of the bleeder resistor must be at least a few
times larger than the allowable power of the bleeder resistor.)
i
i
It is recommended that 15 kΩ max./450 mW min. for 12 VDC and
30 kΩ max./0.1 W min. for 24 VDC be used.
Inrush Current
A load that has a large inrush current (e.g., a lamp or motor) will
damage the Proximity Sensor, in which case connect the load to
the Proximity Sensor through a relay.
R
OFF
:
: Load reset current (mA)
The allowable power of the bleeder resistor. (The actual
Leakage current of the Proximity Sensor (mA)
S
S
2
/(i
/R (mW)
R
- - i
OFF
) (kΩ)
Bleeder resistor R
Load
V
S
E2EM