Datasheet

9
E2EH
Safety Precautions
Refer to Warranty and Limitations of Liability for details.
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.
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 M12 M18 M30
DC 2-wire E2EM-
X@D@
Shielded
l2.43.66
d182750
D2.43.6 6
m1224 45
n182750
DC 3-wire
E2EH-X@B@
E2EH-X@C@
Shielded
l2.43.66
d182750
D2.43.6 6
m1224 45
n182750
ｌ
m
n
m
D
d dia.
ｌ
Type Item M12 M18 M30
DC 2-wire
E2EH-X@D@
Shielded
A3060110
B203590
DC 3-wire
E2EH-X@B@
E2EH-X@C@
Shielded
A3060110
B203590
A
A
B
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 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 of the Proximity Sensor must satisfy the
following.
I
OUT (min) ≤ ION ≤ IOUT (max)
The ON current 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 E2EH-X7D1-T, 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)
R
IN: Input impedance of PLC (3 kΩ)
V
PC: Internal residual voltage of PLC (4 V)
VR: Output residual voltage of Proximity Sensor (5 V)
I
leak: Leakage current of Proximity Sensor (3 to 100 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: E2EH-X7D1-T