CT Series M30 Capacitive Prox.

CT Series M30 Capacitive Prox.
Dimensions
CT Series Part Numbers
M30x1.5
.47”/
12 mm
The CT series uses a part numbering system similar to our other sensor products. For
example: Part Number CT1-AP-2A would be a N.O., PNP, M30 capactive proximity sensor; unshielded, with a 20mm sensing range and a 2m axial cable.
CT1-
AN-
3.94”/
100 mm
Sensors
Output State
N.O. (normally open)
N.C. (normally closed)
.28”/
7 mm
.83”/
21 mm
• Sensitivity adjustment with 20
turns trimmer
• Metal housing with axial cable
• detects metallic & non-metallic
objects
• Complete overload protection
• IP65 protection degree
• Double LED status indicators
A
C
Logic
NPN Output- 3 wire
PNP Output - 3 wire
.20”/ 05 mm
.51”/
013 mm
N
P
Sensing Range
1
Standard shielded, 15mm
Standard unshielded, 20mm 2
Accessories
Type of Cable
ST30A Straight mounting brackets
ST30C Right-angle mounting brackets
GXM3PD2013: Package of 6 extra hex nuts
A
With 2m (6.5ft) axial cable
Specifications
Wiring Diagrams
Model
CT1-AN-1A, CT1-AP-1A
CT1-AN-2A, CT1-AP-2A,
CT1-CP-2A, CT1-CN-2A
NPN Output
Type/(Sn) Nominal Sensing Distance
Shielded/2 to 15mm
(0.079-0.59in)
Unshielded/2 to 20mm
(0.079-0.70in)
Operating Distance
2 to 12mm (0.079-0-0.474in)
2 to 16mm (0.079-0-0.63in)
Differential Travel
2 to 20%
Repeat Accuracy
10%
Operating Voltage
10-30VDC
Ripple
울10%
No-load Supply Current
8mA
Load Current
울200mA
Leakage Current
울10µA
Voltage Drop
1.8 volts maximum
Output Type
NPN or PNP / NO or NC / 3 wire
Switching Frequency
100Hz
(tv) Time Delay Before Availability
100ms
BN/1
D
+
R
L
BK/4=NO
BK/2
NP N out
Z
BU/3
--
PNP Output
BN/1
+
Z
P NP out
BK/4=NO
BK/2
LE D
R
D
BU/3
Maximum admissible capacity C=1µF.
M12 Connector
S upply (--)
(OUT NO)
3
1
2
(OUT NC)
Connector on sensor
Black
Blue
3
4
2
1
White
C
Output Power Short-Circuit Protection
Yes (switch autoresets after overload is removed)
Temperature Range
-25° to +70° C (-13° to 158° F)
Temperature Drift
20% Sr
Protection Degree (DIN 40 050)
IEC IP65
LED Indicators
Green (supply, Red (N.O. output energized)
Housing Material
Nickel-plated brass
Sensing Face Material
PBT
Tightening Torque
100Nm (73.7lb-ft)
Weight
280g (19.88oz)
Characterstic curves
Detection area
Brown
Connector on cable
Distance Y (mm)
S upply (+)
4
L
--
Input Power Polarity Reversal Protection Yes
20
20
10
15
0
--10
--20
0
5
10
15
Distance x (mm)
20
Sensitivity adjustment
Sensitivity adjustment
Detection area
20
20
10
5
10
0
--10
--20
0
0
5
10
Distance x (mm)
15
Trimmer turns
T
Protection From Input Voltage Transients Yes, only if transient peak does not exceed 30VDC
Distance Y (mm)
T
C
Trimmer turns
LE D
1A
M30 capacitive prox. sensor CT1
.71”/
20 mm
Capacitive Proximity
M30 (30mm) – DC
Series
2.32”/
59 mm
SW36
10
0
0
10
20
Distance x (mm)
30
0
4
8
12
16
20
Distance x (mm)
he
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641
Centsable™ Inductive Proximity Sensors
Never use this catalog for installation or operation of equipment;
refer to the product documentation.
NOTE: See our Web site for updated information
on capacitive proximity sensors.
Introduction –
How do inductive
proximity switches
work?
Inductive proximity switches are
used to detect the presence of
metallic objects without actually
contacting the object. Their highspeed switching and small size
makes them indispensable in
automation applications.
Inductive proximity switches
consist of a coil driven by an oscillator. The oscillator creates an
electromagnetic
field
which
appears at the active face of the
switch. If a metal target enters
this area, the electromagnetic
field is reduced and the switch
turns on or off.
Some typical inductive sensor
applications are: counting metallic objects, monitoring the position of elements in a machine,
sensing the presence of metallic
parts like screws, etc., and measuring the rotational speed of
axial detecting cams.
Technical Terms
The following descriptions refer
to the European standard
EN 60947-5-2. of Sept. 95.
The specifications given here are
intended to be minimum performance values described by the
standard.
Shielded Proximity Switches
Repeat Accuracy (R)
A metal housing surrounds the
coil, and only the front of the
active face is sensitive. The device
allows flush installation on metal
plates without any performance
change. Shielded units will not
interfere with each other when
installed side-by-side.
The repeat accuracy of the
effective operating distance (Sr) is
measured over an eight hour
period at an ambient temperature
of 73°F (±9°) [23°C (± 5°)] at a
specified humidity and with a
specified supply voltage. The difference between the measurements shall not exceed the specified value, or if not specified, 10%
of Sr.
Unshielded
Proximity Switches
The sensor housing does not
cover the side of the sensing
head. This type sensor has a
higher sensing range than the
shielded type.
Standard Target
A standard target is square, 1mm
thick, and made from type FE360
carbon steel. The length of the
side of the square is equal to the
diameter of the sensor’s active
surface, or three times the
rated operating distance (Sn),
whichever is greater.
Differential Travel (H)
The differential travel is given
as a percentage of the effective
operating distance (Sr) and is the
maximum difference between
the switching distances. The
differential
is
intentionally
introduced to guarantee the stability of the output state in case
the target is positioned near the
switching points.
Operating Distance
(Sensing Range) (S)
The operating distance is the distance at which a standard target
approaching the active face of the
sensor causes a sensor output
state change.
Rated Operating Distance —
(Nominal Sensing Distance)
(Sn)
This distance does not take into
account manufacturing tolerances (±10%) or variations due to
external conditions such as voltages and temperatures not falling
within the rated values.
Ripple
This is given as a percentage of
the mean supply voltage. It is the
maximum peak-to-peak value of
the admitted ripple voltage. A
ripple voltage of <10% Ue is desirable.
Voltage Drop (Ud)
This is the voltage measured
across the active output of the
proximity switch when the rated
operational current (Ie) flows in
the load at the rated supply
voltage and the temperature is at
73°F (±9°) [(23°C (±5°)]. Unless
specified differently, the following
values are guaranteed:
Two-wire DC models <8VDC
Three-wire DC models <3.5VDC
Two-wire AC models <10VDC
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Technical Terms
Rated Insulation Voltage (Ui)
Unless specified differently, all of
the sensors with a supply voltage
of up to 50VAC and 75VDC are
tested at 500VAC.
Sensors with a supply voltage up
to 250VAC are tested as follows:
Class 1 (with earth terminal) at 1500VAC
Class 2 (with double insulation, without
earth terminal) at 3000VAC.
OFF-State (Leakage) Current (Ir)
This is the current which flows
through the load circuit of the
proximity switch in the OFF state
at the maximum supply voltage.
Make Function
(NO; Normally Open)
A make function causes load
current to flow only when a target
is detected.
Break Function
(NC; Normally Closed)
A break function causes load
current to flow only when a target
is not detected.
Output Type and
Load Connections –
Three-wire NPN
There are two power wires and
one output wire. The switching
element is connected between the
output wire and the negative terminal, and the load is connected
between the output wire and the
positive terminal. In the ON state,
the current sinks from the load
into the switching element.
Output Type and
Load Connections –
Three-wire PNP
There are two power wires and
one output wire. The switching
element is connected between the
output wire and the positive terminal, and the load is connected
between the output wire and the
negative terminal. In the ON
state, the current flows from the
switching element into the load.
Four-wire NPN or PNP
(programmable output state)
There are two power wires, one
NO/NC selection input and one
output wire. The output state is
programmable, connecting the
input wire to one of the power
supply lines.
Four-wire NPN or PNP
(complementary outputs)
There are two power wires, one
NO output and one NC output.
Switching Frequency (f)
Switching frequency is the
maximum output switching frequency performed by the output
circuit when standard targets
cross the sensing field at a distance of Sn/2. The targets are
spaced 2d.
For DC sensors, the minimum output
pulse width must not fall below 50µS.
For AC sensors, the minimum output
pulse must not fall below half a sine
period
(ie. for 60 Hz, 1/60÷2 = 8.33ms.)
Four-wire NPN and PNP
There are two power wires, the
output type is wiring programmable. NPN output is available by
connecting the PNP terminal to
the negative power suppy line.
PNP output is available by connecting the NPN terminal to the
positive power supply line.
Open Collector
The output transistor is not internally connected to a pull-up or
pull-down load. It is therefore
possible to connect an external
load supplied by an external
voltage.
Short-Circuit Protection
All DC sensors have integrated
short-circuit
protection.
AC
sensors should not be protected
externally by such devices as
fuses.
Polarity Reversing Protection
No damage will occur to proximity
switches if the supply wires are
reversed.
Overvoltage Protection
No damage will occur in the presence of surge pulses exceeding
UB and energy less than 0.5J.
Protection Against
Inductive Loads
Unless otherwise specified, DC
sensors are protected against
inductive overvoltage by use of a
surge diode or a zener diode.
Turn On Time
Turn on time is the elapsed time
from the time the target enters the
sensing range until the output
switches.
Turn Off Time
Turn off time is the elapsed time
from the time the target is
removed
until
the
output
switches.
LED Status Indicators
Proximity switches may incorporate one or more color indicators.
The meaning of the colors are:
CONTINUOUS GREEN: Power ON
CONTINUOUS YELLOW: Output ON
CONTINUOUS RED: Fault
(on AC models, RED = output on
Degree of Protection
If not otherwise specified, proximity switches (when installed in
accordance with manufacturer’s
instructions) have minimum IP65
protection against dust and water
jets.
Temperature Range
Unless otherwise specified, the
minimum temperature range is
–13 to +158°F (-25 to +70°C)
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Technical Terms (Cont’d)
Shocks
Mutual Interference
In accordance with IEC 68-2-27
Pulse shape: half-sine
Peak acceleration: 30g
Pulse duration: 11ms
This paragraph describes the
meaning of the minimum distance between a sensor or
sensors and damping materials to
avoid interaction.
Unless otherwise specified, the
following data is the minimum
guaranteed:
Vibration
In accordance with IEC 68-2-6
Frequency range: 10-55Hz
Amplitude: 1mm
Sweep cycle duration: 5min.
Duration of endurance at 55Hz:
30 min. in each of the three axis
directions
Detection Area Graph
This is a graph of the parallel displacement needed to switch on
(switch off, dashed line) as a function of the target distance. The
construction of the curve is
obtained by measuring the lateral
distance between the sensor axis
and the edge of the target necessary to switch on or off at any
target distance (see figure below).
Distance/target Size Graph
Indicates the ON switching distance when target material and
size changes.
Below are some typical values for
different target material of standard dimension:
Inox Steel: 0.6-1 x Sn
Brass: 0.35-0.50 x Sn
Aluminum: 0.35-0.50 x Sn
Copper: 0.25-0.45 x Sn
D1: Minimum distance between the
sensing faces with devices mounted
on parallel axes.
D2: Minimum distance between the
sensing faces with devices mounted
in front of each other.
D3: Minimum distance between the
sensing face and a metallic surface in
front of the device.
D4: Minimum depth of the area free
from damping material embedding
the sensor.
D5: Minimum diameter of the area
free from damping material embedding the sensor.
D6: Minimum distance between the
sensing faces of two sensors mounted
at 90°.
Installation Notes
Select a sensor compatible with
the operating environment: verify
the compatibility between building materials, the presence of
chemicals, temperature range,
protection degree, vibrations,
shocks, EMC, supply voltage
available, load type, etc.
Select the sensor by referring to
the size and type of material to be
detected.
Check the minimum distances
between sensor and damping
materials or another sensor.
Check that the number of operations does not exceed the
maximum switching frequency. If
the phase of the output signal is
important, check the turn on and
turn off time.
Metallic chips or dust must not
accumulate on the sensing face.
The distance between the sensor
and the object to detect must not
exceed the assured operating distance Sa; the best operating distance is Sn/2.
Check the effect of vibrations.
Install the sensor using the
installation accessories and do
not exceed the maximum tightening torque.
Electrical Connections
Keep sensor cables and power
cables separated to avoid electrical interference.
The power supply voltage must
not exceed the specified limits
UB.
If a non-stabilized supply voltage
is used for DC sensors, the
maximum voltage peak under
minimum power consumption
conditions and minimum voltage
peak under maximum power consumption must not exceed UB
limits.
If the power supply of the sensor
is also used to switch inductive
loads, a suppression device must
be provided. A fuse to protect the
power supply line is also recommended.
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