Ewellix CAXE Limit Switch User manual

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MAX 2 LINES
CAXE Limit Switch
INSTALLATION, OPERATION AND MAINTENANCE MANUAL

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CAXE Limit Switch
1.0 General information
WARNING
Carefully read these instructions before installing, assembling,
using or maintaining the switch. Keep User’s Manual near
application in which switch is being used.
Important: This installation instruction is a part of the CAXE
limit switch and should be kept together with all relevant
documentation regarding the application in which it is being
used.
The customer should not modify the CAXE limit switch in
any way.
Any modication made by non-Ewellix licensed sta will void
the warranty and could make the switch unsafe. Ewellix dis-
claims any and all liability, obligation, or responsibility for
any modied product and for any claims, demands or
causes of action for damage or for personal injuries resulting
from modication and/or use of such product.
If the limit switch has been misused, or altered without prior
written authorization, warranty will be void.
WARNING
• All electrical and mechanical installation/maintenance operations
should be carried out by trained and experienced personnel.
• Disconnect the power supply before installation or maintenance.
• Appropriate safety equipment should be known by the service
engineer.
• When this equipment is connected to a power supply, make sure
that it conforms to the technical specications in this manual.
1.1 Intended use
The CAXE limit switch system is designed to be used in the
following conditions:
• Industrial environment, process industry and domestic ap-
plications etc.
• Ambient operating temperature of –20 to +70 °C
• The CAXE limit switch system is designed for actuators
that can utilize the specic protection tube mentioned in
this user manual.
DANGER
Indicates a dangerous situation, which
will lead to death or serious personal
injury, if the precautionary measures are
ignored.
WARNING
Indicates a dangerous situation, which
can lead to minor or moderate injury or
property damage, if the precautionary
measures are ignored.
CAUTION
Indicates a dangerous situation, which
can lead to minor or moderate injury
the precautionary measures are ignored.
NOTICE
Indicates information considered
important, but not hazard-related (e.g.
messages relating to property damage).
NOTE
Emphasizes useful hints and
recommendations as well as information
for ecient and trouble-free operation.

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2.0 CAXE limit switch
2.0 CAXE limit switch
The CAXE limit switch system is based on two complemen-
tary (NO/ NC) reed switches, mounted on a special protec-
tion tube to indicate actuator end positions. Limit switches
combined with Ewellix actuator control units or any other
PLC make it possible to set the stroke to any desired length.
• Robust in terms of tolerance to vibrations and mechanical
shock.
• Front attachment G3 must be selected for use with CAXE.
• It is recommended that the limit switch be placed at least
10 mm from the end stop to avoid mechanical failure.
Table 1
Suitable control units
Control units
CAR 22 CAR 32 CAR 40 CAT 32B CARN 32
CAXE nn1) ●) ●) ●) ●) ●)
1) nn, see the ordering key

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CAXE Limit Switch
3.0 Technical data
Important! The sensor has no overload protection and no reverse polarity protection.
CAXE
Operating voltage 5 to 30 V DC
Max. current 100 mA DC
Protection class III
Voltage drop < 5 V
Electrical function Normally Closed (NC) and
Normally Open (NO)
Make/break time 0,3 ms / 0,6 ms
Operating temperature –20 to +70 °C
Degree of protection IP 67 (sensor element)
Vibration/shock According to IEC 60947-5-1
(sensor element)
Cable dimensions (L x D) 2 000 x 3 mm (PUR)
Cable area 3 × 0,14 mm2

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4.0 Dimensions
4.0 Dimensions
B
C
A
B
C
A
A B C
CAXE 22 42,5 37 14
CAXE 32/32B 47, 5 40 20
CAXE 40 46 46 23

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CAXE Limit Switch
5.0 Mechanical installation
CAUTION
Only trained and experienced personnel are allowed to install
this equipment.
The CAXE limit switch system is prepared for easy attach-
ment on intended actuators (see table 1). For easy installa-
tion, prepare the actuator with CAXE limit switches before
installing it in its nal location.
If the actuator is accessible in an existing installation, the
CAXE should be easy to install.
5.1 Content
Each CAXE limit switch unit consists of:
A. 2 pcs Switch attachment (a plate with a screw attached)
B. 2 pcs Locking plate (holding the sensor in place)
C. 2 pcs Washer (stainless steel A2, 6,7 × 3,3 × 0,6 mm)
D. 2 pcs Locking nut (M3, stainless steel A2)
E. 2 pcs Limit switch (sensor element) with cable.
F. Cable grommet
G. Protection shell
H. Plastic plug (end cover)
I. Prole with assembled limit switch rod
J. 2 pcs set of screws (assembled on prole)
K. Nut with Distance and Washer (2 for CAXE 40)
5.2 Installation instructions
NOTICE
The limit switches must be adjusted properly in order to eliminate
the risk of running into mechanical end stops. It is recommended
that installer allow at least 10 mm from the end stop to avoid
mechanical failure due to motor roll-out and reaction time of the
control system.
1. Assemble the prole (I) onto the actuator, tighten set
screws (J) and the nut (K) on the actuator’s front
attachment.
2. Place the switch attachment (A) inside the T-slot and
then the locking plate (B), washer (C) and locking nut (D)
for each limit switch.
3. Place the limit switches (E) on the protection tube and
adjust the positions.
4. Tighten the locking nut (D) to secure the limit switch on
the protection tube with a maximum torque of 0,6 Nm.
5. Fix the cable grommet (F) in its slot on the protection
shell (G).
6. Pull out the cables through the cable grommet (F). Avoid
sharp bending radius of the cables (max 15 mm radius)!
7. Assemble the end cover (H).
8. Snap the protection shell (G) onto the protection tube (I).
CAXE 22,32 CAXE 40
A
I
K
J
E
B
C
D
G
F

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5.0 Mechanical installation
5.3 Disassembly
instructions
In order to open up the CAXE for any necessary service, fol-
low the instructions below:
1
2

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CAXE Limit Switch
6.0 Electrical installation
WARNING
• All electrical and mechanical installation/maintenance operations
should be carried out by trained and experienced personnel.
• Disconnect the power supply before installation or maintenance.
• Appropriate safety equipment should be known by the service
engineer.
• Make sure that the connected power source fulls the technical
specications in this manual..
• Never connect the limit switch to an AC supply!
Important: The CAXE limit switch has no overload or re-
verse polarity protection and must only be used with DC
supply voltage.
As an extra precaution, a fast acting fuse with a value of ≤
0,1 AF could be placed in series with each CAXE. This will
protect the limit switches from being damaged by over
current.
Connecting diagrams
–
Important! For DC-supply only
BK
BU
BU
BK
BU
BN
BN
BU
BN
BU
BN
K1
M
K1 K2
CAXE
CAXE CAXE
CAXE CAXE
L–
L–
L+
PLC
+
–
+
+
–
BU
BN
+
–/ V DC motor
Connecting
switch
Operating
switch
Wire colours:
BN – Brown
BK – Black
BU – Blue
/ V DC motor
K2
K2
K2K1
K1
M

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7.0 Powering the CAXE
7.0 Powering the CAXE
After the CAXE has been wired according to the example
shown in the previous section, the power supply can be
turned on.

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CAXE Limit Switch
8.0 Maintenance
Following the maintenance plan shown below is recom-
mended and will help provide safe and reliable operation. If
the actuator is used in temperatures below freezing (0 °C),
apply a thin layer of lubricant on the switch rod to avoid
moisture/ice build-up.
CAXE maintenance plan
Interval Maintenance work
Monthly
Check for visible damage.
Check for damaged cables.
Function check of operation.
Annual
Check the electrical connections.
Check grease on switch rod
(if applicable)