KEYENCE EX-500W User Manual
Instruction
Manual
Inductive Gauging Sensor
96M0368
EX-500(W) Series
CONTENTS
SAFETY PRECAUTIONS
Part Names and Functions.......................................................... 3
Connections ................................................................................ 4
Example of connections .............................................................. 5
Hints on correct use .................................................................... 5
Installation ................................................................................... 6
Adjustment .................................................................................. 7
Measuring range vs. analog output ............................................. 9
Auto-zero/Auto-span functions .................................................... 9
Interference suppression function ............................................. 12
Specifications ............................................................................ 13
Troubleshooting guide .............................................................. 14
Characteristics .......................................................................... 14
Dimensions ............................................................................... 15
WARRANTIES AND DISCLAIMERS ........................................ 16
Note
This is a class A (EN55011: EMI standard) product. In a domestic
environment this product may cause radio interference in which
case the user may be required to take adequate measures.
This manual describes how to install the EX-500(W) Series as well as its
operating procedures and precautions. Please read this manual carefully
to get the best from your EX-500(W) Series.
Safety precautions
Symbols
The following symbols alert you to important messages. Be sure to read
these messages carefully.
WARNING
CAUTION
Note
Failure to follow instructions may lead to injury.
(electric shock, burn, etc.)
Failure to follow instructions may lead to product
damage.
Provides additional information on proper operation.
General precautions
• At startup and during operation, be sure to monitor the functions and performance of the EX-500(W) series.
• We recommend that you take substantial safety measures to
avoid any damage in the event a problem occurs.
• Do not open or modify the EX-500(W) series or use it in any
way other than described in the specifications.
• When the EX-500(W) series is used in combination with other
instruments, functions and performance may be degraded,
depending on operating conditions and the surrounding environment.
• Do not use the EX-500(W) series for the purpose of protecting
the human body.
2
PART NAMES AND FUNCTIONS
1 Sensor head
cable connector
2 Indicators
POWER: Power indicator
OVER: Measurement out-of-range indicator
ALARM: Disconnection alarm indicator
3 Response time selector switch
You can select one of the following four response times.
RESPONSE 1 2 3 4
Response time 0.1 ms 1 ms 10 ms 100 ms
4 Mode selector switch
This switch is used to select the desired mode based on the
target material.
MODE Function
1 MEASUREMENT mode When measuring targets, set the
2 ADJUSTMENT mode
for aluminum
3 ADJUSTMENT mode
for stainless steel
4 ADJUSTMENT mode
for steel
(After completing the adjustment procedure, set the mode selector switch to "1"
to start measurements.)
switch to this position.
When adjusting output voltage
(current), select the ADJUSTMENT
mode based on the target material.
5 Cable length selector switch
Normally set this switch to "3 m" (the lower position).
When an optional extension cable (7 m) is added, set this
switch to "10 m" (the upper position). (7 m cable: model OP-
20708)
6 Lock switch
When this switch is set to LOCK (the lower position), any
output adjustment keys (7) are disabled.
7 Output adjustment keys
The functions are changed by adjusting the Mode selector
switch position.
Mode
Key No.
Zero-point set key
Sets the output to 0 V when the
target is in contact with the
sensor head.
Full-scale set key
Sets the output to 5 V when the
target is at the maximum
measuring distance from the
sensor head.
Linearity compensation key
Sets the output voltage to 2.5 V
to compensate for the linearity of
the output voltage when the
target is placed at half the
maximum measuring distance (1/
2 of F.S.) from the sensor head.
* The auto-span key functions in the range of 2 to 4 V output voltage.
ADJUSTMENT
mode
2. 3. 4
Auto-zero/Auto-span reset key
Resets the auto-zero and autospan functions.
Auto-span key
Changes the input-to-output ratio
and sets the output to 2.5 V when
the target is at any position within
measuring range.
(When current output is used,
pressing this key sets the output
current to 12 mA.)
Auto-zero key
Sets the output to 0 V when the
target is at any position within
measuring range.
(When current output is used,
pressing this key sets the output
current to 4 mA.)
MEASUREMENT
mode
1
3
CONNECTIONS
Referring to the following descriptions of terminals, complete
connections before you turn the power ON.
Analog
voltage
output
(V)
Analog
current
output (mA)
8 9 10 11 12
1 2 3 4 5 6 7
12 to 24 VDC
Interference suppression
(CONTROL)
0 V
Auto-zero input
(SYNC)
GND
NPN output
(Disconnection alarm output)
Sensor head
cable connector
GNDNot used
4 Auto-zero input terminal:
Sets the analog output voltage to 0 V when this terminal and
GND terminal (5) are short-circuited. (When current output is
used, the output current is set to 4 mA.) (See p.9.)
6 NPN output (Disconnection alarm output) terminal:
Outputs a signal when the sensor head cable is disconnected.
8 Analog voltage output terminal:
Analog voltage of 0 to 5 V relative to full measuring range is
output.
9 Analog current output terminal:
Analog current of 4 to 20 mA relative to full measuring range is
output.
A & B Interference suppression terminals: (See p.12.)
Note
The interference suppression function is not available with the
EX-500(W) series (compliant model with the EMC directive (CE
marking)). If you want to use the function, be sure to check
whether the operation complies with the EMC directive on your
account.
Input circuit diagram Output circuit diagram
4
CONNECTIONS
HINTS ON CORRECT USE
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.
Sensor head
Ferrite core (smaller one in
the accessory)
ZCAT1325-0530A (TDK)
30 Max.
20 Max.
8 9 10 11 12
POWER OVER ALARM
1
12 to 24 VDC
EX-501
2
3
4 5 6 7
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.
■ 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 performance 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 EX500(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 characteristics will change.
• The junction connector is grounded through its housing. Make necessary arrangements for insulation.
5
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