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Operating Instructions
Evaluation Unit CMS-E-BR
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 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 guard, this system prevents
dangerous machine functions from being performed
for as long as the guard is opened. A stop command
is triggered if the guard is opened during the dan-
gerous machine function.
This means:
Starting commands that cause a dangerous ma-
f
chine function must become active only when the
guard is closed.
Opening the guard triggers a stop command.
f
Closing the guard must not cause automatic start-
f
ing 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
f
EN ISO 12100
f
EN 62061
f
Correct use includes observing the relevant require-
ments for installation and operation, e.g. according
to the following standards:
EN ISO 13849-1
f
EN ISO 14119
f
EN 60204-1
f
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 func-
f
tion, initiated by a 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 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 that are permissible in accor-
f
dance with the following combination options
table may be used. 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 regula-
tions are not followed, or if any servicing is not
performed as required, liability will be excluded and
the warranty void.
General safety precautions
Safety components fulfill personnel protection
functions. Incorrect installation or tampering can
lead to severe injuries to personnel.
Check the safe function of the safeguard par-
ticularly
after any setup work
f
each time after replacement of a CMS com-
f
ponent
after an extended period without use
f
after every fault
f
Independent of these checks, the safe function
of the safeguard 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 evaluation
unit, read head and actuator and is functional
only in particular combinations (see combina-
tion options).
The evaluation unit CMS-E-BR is used for monitoring
from one to four safety doors.
The read heads CMS-R-... have electrically isolated
reed contacts with NC contacts and NO contacts.
If the actuator is in the actuating range, the contacts
in the read head are switched by the magnetic field.
The switching status of the contacts is displayed on
the evaluation unit's LEDs (see section LED displays).
Due to the NC/NO contact combination in the read
head, the evaluation unit expects to receive antiva-
lent signal changes. The evaluation unit converts
this information and transfers the guard state to the
control system via a safety contact.
If the actuators for all the read heads connected
are in the actuating range, safety contact 13/14
is closed. The additional auxiliary contact 23/24
is also 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
controlgear 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 auxiliary contact is electrically isolated from the
safety contacts.
If contactors are used, the switching contacts can
be monitored for a possible malfunction by the
evaluation unit via a feedback loop.
In the case of a monitored feedback loop, safety
f
contact 13/14 is activated only if feedback loop
Y1/Y2 was closed before the actuators were
moved into the read heads' actuating range.
A start button must not be incorporated into the
f
feedback loop.
In the case of an unmonitored feedback loop, the
f
2-pin jumper supplied with the evaluation unit must
be connected to terminals Y1/Y2.
If the actuator is moved out of the actuating range,
f
it is ensured that safety contact 13/14 and auxil-
iary contact 23/24 switch only when the actuator
is moved back into the operating distance s
after having exceeded the release distance (see
combination options table).
If the actuation speed falls below the minimum
f
speed, contacts 13/14 and 23/24 remain open.
Connection of CMS read heads
A max. of 4 read heads may be connected to the
f
evaluation unit.
If the actuator is moved slowly toward the read
f
head in lateral approach direction Z, the evaluation
unit changes to the blocked state. To cancel the
blocked state, the actuator must again be moved
beyond the release distance.
Mounting
Caution! The evaluation unit must be mounted
in a control cabinet with a minimum degree of
protection of IP54. 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 guard.
Important! From the assured release distance
s
, the safety outputs are safely shut down. If the
ar
actuator is installed flush, the operating distances
change as a function of the installation depth and
the 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 guard is open up to the distance S
f
(assured release distance), a hazard is excluded.
the actuator is positively mounted on the guard,
f
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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