KEYENCE EX-500(W) Series - Manual (Page 5)

5
CONNECTIONS
To make the EX-500(W) series comply with the EMC directive
(CE marking), use the attached ferrite cores as shown in the
illustration below.
HINTS ON CORRECT USE
■ Noise interference
When using a switching regulator, make sure that the F.G.
terminal or the GND terminal is grounded.
• Keep the wiring and connection cable away from high-voltage
lines or power lines; otherwise noise may affect the perform-
ance of the EX-500(W).
• If noise from the power supply line causes the EX-500(W) to
malfunction, use an isolating transformer with the power
supply.
■ Auto-zero input
When the DC 2-wire proximity sensor (KEYENCE EV Series) is
used for auto-zero input, power supply voltage of the EX-
500(W) Series must be 20 V or higher.
■ Warm-up time
Do not start adjustment/measurement until at least 30 minutes
after the power is turned ON. The circuitry is not stable during
this period and fluctuation in measured values may result.
■ Cable extension
• The standard sensor head cable length is 3 m. It can be
extended to 10 m by connecting 7-m extension cable (Model:
OP-20708).
• Do not change the specified sensor head cable length
(3 or 10 m). If you extend or cut the cable, its character-
istics will change.
• The junction connector is grounded through its hous-
ing. Make necessary arrangements for insulation.
POWER OVER ALARM
EX-501
3
1
8 9 10 11 12
2
4 5 6 7
12 to 24 VDC
30 Max.
20 Max.
Sensor head
Ferrite core (smaller one in
the accessory)
ZCAT1325-0530A (TDK)
Ferrite core (larger one in the
accessory)
ZCAT2035-0930 (TDK)
Be sure to use a sheathed cable with an
outer diameter of 2.5-mm or less for the
power cable.