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Operating Instructions
Evaluation Unit CMS-E-AR
These operating instructions are valid only in
conjunction with the operating instructions for
the relevant read heads CMS-R-... and actua-
tors CMS-M-... !
Correct use
Evaluation units series CMS are technical safety
devices for monitoring movable safety guards.
Special read heads are connected for this purpose.
The system consists of evaluation unit, read head
and actuator. It forms a non-contact, magnetically
coded interlocking device with low coding level
(type 4).
In combination with a safety guard, this system
prevents dangerous machine functions from being
performed for as long as the safety guard is opened.
A stop command is triggered if the safety guard is
opened during the dangerous machine function.
This means:
Starting commands that cause a dangerous ma-
f
chine function must become active only when the
safety guard is closed.
Opening the safety guard triggers a stop com-
f
mand.
Closing the safety guard must not cause auto-
f
matic starting of a dangerous machine function.
A separate start command must be issued. For
exceptions, refer to EN ISO 12100 or relevant
C-standards.
Before safety components are used, a risk assess-
ment must be performed on the machine, e.g. in
accordance with the following standards:
EN ISO 13849-1, Safety of machinery – Safety-re-
f
lated parts of control systems – Part 1: General
principles for design
EN ISO 12100, Safety of machinery – General
f
principles for design – Risk assessment and risk
reduction
EN 62061, Safety of machinery – Functional
f
safety of safety-related electrical, electronic and
programmable electronic control systems.
Correct use includes observing the relevant require-
ments for installation and operation, e.g. according
to the following standards:
EN ISO 13849-1, Safety of machinery – Safety-re-
f
lated parts of control systems – Part 1: General
principles for design
EN ISO 14119, Safety of machinery – Interlocking
f
devices associated with guards – Principles for
design and selection
EN 60204-1, Safety of machinery. Electrical equip-
f
ment of machines. General requirements
Important!
The evaluation unit must be used only in con-
f
junction with the designated read heads and
actuators from EUCHNER. On the use of different
read heads or actuators, EUCHNER provides no
warranty for safe function.
The devices permit a safety-related stop function,
f
initiated by a safety guard according to Table 8
– EN ISO 13849-1: 2015.
The safety-related function of the safety system
f
is the opening of the output contacts (13/14,
23/24) when the actuator is absent.
The user is responsible for safe integration of
f
the device into a safe overall system. For this
purpose, the overall system must be validated,
e.g. in accordance with EN ISO 13849-2.
Correct use requires observing the permissible
f
operating parameters (see technical data).
If a product data sheet is included with the prod-
f
uct, the information on the data sheet applies
in case of discrepancies with the operating
instructions.
Only components may be used that are permissi-
f
ble in accordance with the following combination
options table. Refer to the operating instructions
of the corresponding component for further
information.
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.
General safety instructions
Safety components fulfill personal protection
functions. Incorrect installation or tampering can
lead to severe injuries to personnel.
Check the safe function of the safety guard
particularly
after any setup work
f
each time after replacement of a CMS component
f
after an extended period without use
f
after every fault
f
Independent of these checks, the safe function
of the safety guard should be checked at suitable
intervals as part of the maintenance schedule.
For information about possible time intervals, refer
to EN ISO 14119: 2013, section 8.2.
Warning! Danger of fatal injury in the event of
incorrect connection or incorrect use.
Safety components must not be bypassed (bridg-
ing of contacts), turned away, removed or other-
wise rendered ineffective. Pay particular attention
to EN ISO 14119: 2013, section 7, regarding the
possibilities for bypassing an interlocking device.
The device may be installed and put into operation
only by authorized personnel,
who are familiar with the correct handling of
f
safety components
who are familiar with the applicable EMC reg-
f
ulations
who are familiar with the applicable regulations
f
on operational safety and accident prevention
who have read and understood the operating
f
instructions.
Function
The safety system CMS consists of an eval-
uation unit, read head and actuator and is
functional only in particular combinations (see
combination options)!
The evaluation unit CMS-E-AR is used for monitoring
from one to 30 safety doors.
The read heads CMS-R-... have electrically isolated
reed contacts with NO contacts.
If the actuator is in the operating distance, the con-
tacts in the read head are switched by the magnetic
field. The evaluation unit expects closed contacts at
both inputs. The evaluation unit converts this infor-
mation and transfers the safety guard state to the
control system via a safety contact. If the actuators
for all the read heads connected are in the operating
distance, safety contact 13/14 is closed.
When the safety door is opened or closed, the eval-
uation unit is checked to ensure that it is functional.
In this way internal errors from the read head to the
control unit output can be detected.
If an error is detected, the evaluation unit changes
to a blocked state. The safety contact remains in
the open state.
5
The evaluation unit status is displayed visually by
means of LED indicators.
A max. of 30 read heads may be connected to
f
the evaluation unit.
To achieve safety category 3 with the devices in
f
the CMS-E-AR series, on the monitoring of one or
two safety doors (each with one read head) read
heads with reed contacts wired in parallel, e.g.
CMS-R-AXD, must be used.
When connecting three or more read heads (up
f
to 30), the area most frequently accessed must
be monitored with a read head with reed contacts
wired in parallel. All other read heads must have
reed contacts wired in series, e.g. CMS-R-AXF
(see Figure 2).
Mounting
Caution! The evaluation unit must be mounted
in a control cabinet with a minimum degree of
protection of IP 54. A snap-in element on the rear
of the device is used for fastening to a mounting
rail. If several evaluation units are mounted side
by side in a control cabinet without air circulation
(e.g. fan), a minimum distance of 10 mm must
be maintained between the evaluation units. This
distance enables the heat from the evaluation unit
to dissipate.
Caution! Risk of damage to equipment as a result
of incorrect installation. Read heads or actuators
must not be used as a mechanical end stop. Fit
an additional end stop for the movable part of the
safety guard.
Important! From the assured switch-off distance
s
, the safety outputs are safely shut down. If the
ar
actuator is installed flush, the switching distance
changes as a function of the installation depth and
the safety guard material.
Note the following points:
Read head and actuator must be easily accessible
for inspection and replacement.
The switching operation must be triggered only by
the specific actuator designated for this purpose.
Read head and actuator must be fitted so that:
when the safety guard is open up to the distance s
f
(assured switch-off distance), a hazard is excluded.
the actuator is positively mounted on the safety
f
guard, e.g. by using the safety screws included.
Tighten the screws with a torque of max. 0.5 Nm.
they cannot be removed or tampered with
f
using simple means. Pay particular attention to
EN ISO 14119: 2013, section 7, regarding the
possibilities for bypassing an interlocking device.
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