CKD ECS2-G4-00-50G-49-L-T2YD-D-H, Инструкция по эксплуатации

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16
Proximity switch (T type) 2.5.2

Connection of lead wires
Turn off the power to the device in the electric circuit to which the switch is to be connected and connect the
lead wires according to their color.
If the switch is not wired correctly or the load is short-circuited, it may cause damage not only to the switch
but also to the electric circuit on the load side. Even if the switch is wired correctly, not turning off the power
may cause damage to the electric circuit of the switch load.

Protection of the output circuit
For the following cases, refer to the figures below and install a protection circuit:
• When an inductive load (relay or solenoid valve) is connected and used: See Ex. 1
Use a surge absorption element since a surge voltage is generated when the switch is turned off.
• When a capacious load (capacitor) is connected and used: See Ex. 2
Use a current regulating resistor since a starting current is generated when the switch is turned on.
• When the lead wire length exceeds 10 m: See Ex. 3 and 4 (2-wire type), Ex. 5 (3-wire type)
Switch
Load
Brown
Black
Blue
DC power for
switch and load
10 VDC to 28 VDC
Example of 3-wire basic circuit (1)
(When same power is used for switch and load)
Switch
Load
Example of 3-wire basic circuit (2)
(When separate power is used for switch and load)
DC power for switch
10 VDC to 28 VDC
DC power for load
30 VDC or less
Brown
Black
Blue
Switch
Load
Brown
Blue
10 VDC to 30 VDC
Example of 2-wire basic circuit
T1
Load
Brown
Blue
85 VAC to 265 VAC
Example of T1 basic circuit
～
Ex. 1 Using inductive load with surge absorption
element (diode). (For diode, use V06C
manufactured by Hitachi or equivalent.)
Switch
Load
Brown
Black
Blue
Ex. 2 Using capacious load with current regulating
resistor R.
Use the following formula to figure out
resistance R (
Ω )
.
―― = R (Ω)
V
0.05
Switch
R
C
IC
Brown
Black
Blue
Ex. 4 - Starting current restriction resistor
R = Highest possible resistance for the load
circuit.
- Wire near the switch (within 2 m).
Switch
Load
Brown
Blue
Within 2 m R
Ex. 3 - Choke coil
L =
Several hundred μH to several mH
Excellent high frequency characteristic
- Wire near the switch (within 2 m).
Switch
Brown
Blue
Within 2 m L
Load