Datasheet

E2EM
6
Safety Precautions
Refer to Warranty and Limitations of Liability.
This product is not designed or rated for ensuring
safety of persons either directly or indirectly.
Do not use it for such purposes.
Do not use this product under ambient conditions that exceed the
ratings.
● Design
Influence of Surrounding Metal
When mounting the Sensor within a metal panel, ensure that the
clearances given in the following table are maintained. Failure to
maintain these distances may cause deterioration in the performance
of the Sensor.
Influence of Surrounding Metal (Unit: mm)
AND/OR Connections
Error pulses and leakage current may prevent application in AND or
OR circuits. Always confirm operation in advance to confirm if there
are any problems in operation.
Mutual Interference
When installing Sensors face-to-face or side-by-side, ensure that the
minimum distances given in the following table are maintained.
Mutual Interference (Unit: mm)
WARNING
Precautions for Correct Use
Type Item M8 M12 M18 M30
DC 2-wire
E2EM-X@X@
Shielded
l
---
2.4 3.6 6
d182745
D2.43.66
m122445
n182745
Unshielded
l
--- ---
25 45
d 70 120
D2545
m4890
n 70 120
DC 3-wire
E2EM-X@C@
Shielded
l02.43.66
d 8 18 27 45
D0 2.43.6 6
m 4.5 12 24 45
n12182745
l
m
n
m
D
d dia.
l
Type Item M8 M12 M18 M30
DC 2-wire
E2EM-X@X@
Shielded
A
---
30 60 110
B203590
Unshield-
ed
A
---
200 350
B 120 300
DC 3-wire
E2EM-X@C@
Shielded
A 20 30 60 110
B15203590
B
A
A
Connecting a DC 2-wire Proximity Sensor to a PLC (Programmable Controller)
Required Conditions
Connection to a PLC is possible if the specifications of the PLC and the Proximity Sensor satisfy
the following conditions. (The meanings of the symbols are given below.)
1. The ON voltage of the PLC and the residual voltage of the Proximity Sensor must satisfy the
following.
V
ON ≤ VCC − VR
2. The OFF current of the PLC and the leakage current of the Proximity Sensor must satisfy the
following.
I
OFF ≥ Ileak
(If the OFF current is not listed in the specifications, take it to be 1.3 mA.)
3. The ON current of the PLC and the control output (I
OUT) of the Proximity Sensor must satisfy the
following.
I
OUT (min.) ≤ ION ≤ IOUT (max.)
The ON current of the PLC will vary, however, with the power supply voltage and the input
impedance, as shown in the following equation.
I
ON = (VCC − VR − VPC)/RIN
Example
In this example, the above conditions are checked when the PLC Unit is the C200H-ID212, the
Proximity Sensor is the E2EM-X8X1, and the power supply voltage is 24 V.
1. V
ON (14.4 V) ≤ VCC (20.4 V) − VR (5 V) = 15.4 V: OK
2. I
OFF (1.3 mA) ≥ Ileak (0.8 mA): OK
3. I
ON = [VCC (20.4 V) − VR (5 V) − VPC (4 V)]/RIN (3 kΩ) = Approx. 3.8 mA
Therefore, I
OUT(min.) (3 mA) ≤ ION (3.8 mA): OK
VON: ON voltage of PLC (14.4 V)
I
ON: ON current of PLC (typ. 7 mA)
I
OFF: OFF current of PLC (1.3 mA)
RIN: Input impedance of PLC (3 kΩ)
V
PC: Internal residual voltage of PLC (4 V)
V
R: Output residual voltage of Proximity
Sensor (5 V)
I
leak: Leakage current of Proximity Sensor
(0.8 mA)
I
OUT: Control output of Proximity Sensor (3 to
100 mA)
V
CC: Power supply voltage (PLC: 20.4 to
26.4 V)
Values in parentheses apply to the following PLC
model and Proximity Sensor model.
PLC: C200H-ID212
Sensor: E2EM-X8X1