6
Operating Instructions
Read Heads/Actuators CEM-A-…
Setup and functional check
Observe the information in the operating instructions
for the respective evaluation unit during setup.
WARNING
Danger of fatal injuries as a result of faults in
installation and functional check.
f
Before carrying out the functional check, make
sure that there are no persons in the danger area.
f
Observe the valid accident prevention regula-
tions.
After installation and any fault, the safety function
must be fully checked. Proceed as follows:
f
Switch on operating voltage.
The machine must not start automatically.
f
Close all guards.
f
Activate the guard locking.
f
Test the locking force by trying to open the guard.
The adhesive force of 650 N or 1,000 N is attained
when U
CM
is applied.
Technical data
Read head
Parameter
Value
Material
- Housing
- Read head CES
- Solenoid
Aluminum
Plastic (PPS)
Steel, nickel-plated
Weight
- CEM-A-LE05…
- CEM-A-LH10…
Approx. 0.3 kg
Approx. 0.9 kg
Mechanical life
1 x 10
6
(closing cycles)
1)
Installation position
Any
Degree of protection
acc. to IEC 60529
IP67
Ambient temperature
-25 … +50 °C
Operating distance with center
offset m=0
- Assured switch-off distance S
ar
- Typ. switch-on distance
- Switching hysteresis
20 mm
2 mm
0.7 mm
Connection to evaluation unit
(plug connector X3)
Plug connector M8 (male sock-
et, 3-pin), suitable for snap-ac-
tion and screw terminals
Max. cable length
25 m
External LED connection
(plug connector X2, only
CEM-A-LH10...)
Plug connector M8 (female
socket, 4-pin), suitable for
screw terminals
Max. current consumption of
external LED
500 mA
Solenoid
Locking force (not monitored)
- CEM-A-LE05…
- CEM-A-LH10…
650 N
1,000 N
Adhesive force by permanent
magnet
- CEM-A-LE05K-S2-P
30 N
Adhesive force due to remanence
- CEM-A-LE05R-S2
- CEM-A-LH10K-S2
- CEM-A-LH10R-S2
Approx. 0.5 N
Approx. 40 N
± 25%
Approx. 0.7 N
Max. permissible center offset
between solenoid and mating
plate
± 2.5 mm
Operating voltage U
B
(plug connector X1)
DC 24 V +10%, -15%,
reverse polarity protected
Control voltage U
CM
(plug connector X1)
DC 24 V +10%, -15%,
reverse polarity protected with
free-wheeling diode
Current consumption of read
heads with remanence
- at connection X1.1 (U
CM
)
- CEM-A-LH10K-S2
225 mA (without external LED)
Current consumption of read
heads without remanence
- at connection X1.1 (U
CM
)
- CEM-A-LE05K-S2-P
- CEM-A-LH10R-S3
- at connection X1.2 (U
B
)
- CEM-A-LH10R-S3
100 mA
15 mA (without external LED)
at UCM = 0 V 12 mA
at UCM = 24 V 225 mA
Duty cycle
100%
Power consumption
- CEM-A-LE05R-S2
- CEM-A-LH10K-S3
- CEM-A-LH10R-S3
approx. 2.8 W
approx. 5.4 W
approx. 5.8 W
Operating voltage connection
(plug connector X1)
Plug connector M8 (male
socket, 4-pin)
With CEM-A-LE05… LED,
yellow, integrated into the plug
(see circuit diagram)
1) At an impact energy of max. 1 Joule
Actuator
Parameter
Value
Material
- Housing
- Read head CES
- Solenoid
Aluminum
Plastic (PPS)
Steel, nickel-plated
Weight
- CEM-A-BE05…
- CEM-A-BH10…
Approx. 0.18 kg
Approx. 0.30 kg
Installation position
Active face opposite CES
read head
Degree of protection acc. to IEC
60529
IP67
Ambient temperature
-25 … +50 °C
Adjustment angle (around point X,
see dimension drawing)
± 4°
Maintenance and inspection
WARNING
Loss of the safety function because of damage
to the device.
f
In case of damage, the related safety component
must be replaced. The replacement of individual
parts in a safety component is not permitted.
Regular inspection of the following is necessary to
ensure trouble-free long-term operation:
f
Check the switching function
f
Check the secure fastening of the devices and
the connections
f
Check for soiling
f
Check for sealing of the plug connector on the
safety switch
f
Check for loose cable connections on the plug
connector
f
Check the switch-off distance
No servicing is required. Repairs to the device are
only allowed to be made by the manufacturer.
NOTICE
The year of manufacture can be seen in the lower
right corner of the type label.
Exclusion of liability and warranty
In case of failure to comply with the conditions for
correct use stated above, or if the safety instruc-
tions are not followed, or if any servicing is not
performed as required, liability will be excluded and
the warranty void.
-4
-2
-3
-1
1
3
2
4
0
1
2
3
4
Center offset m [mm]
Distance s [mm]
OFF
ON
Hysteresis
Switch-on
distance
ON
OFF
Hysteresis
Distance s
S
a0
Output state
Switch-off
distance
OFF
Actuator
Read head
s
m
ON
Observe safe switch-off
distance s
ar
= 20 mm on
internal component failure.
Safety outputs are safely
switched off.
Typical operating distance
With evaluation unit CES-A-...B and CES-AZ-...B
Figure 2: Typical operating distance
