EUCHNER CMS-E-FR - Manual (Page 5)

Operating Instructions Safety Switch Evaluation Units CMS-E-FR
These operating instructions are only valid
in conjunction with the operating instructions
for the relevant CMS-R-... read heads and
CMS-M-... actuators !
Correct use
Evaluation units series CMS are technical safety
devices for monitoring moveable 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:
f
Starting commands that cause a dangerous ma-
chine function must become active only when the
safety guard is closed.
f
Opening the safety guard triggers a stop com-
mand.
f
Closing the safety guard must not cause auto-
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 switches are used, a risk assessment
must be performed on the machine, e.g. in accor-
dance with the following standards:
f
EN ISO 13849-1, Safety of machinery. Safety re-
lated parts of control systems. General principles
for design
f
EN ISO 12100, Safety of machinery – General
principles for design – Risk assessment and risk
reduction
f
EN 62061, Safety of machinery – Functional safety
of safety-related electrical, electronic and program-
mable electronic control systems.
Correct use includes observing the relevant require-
ments for installation and operation, e.g. based on
the following standards:
f
EN ISO 13849-1, Safety of machinery. Safety re-
lated parts of control systems. General principles
for design
f
EN ISO 14119 (supersedes EN 1088), Safety of
machinery. Interlocking devices associated with
guards. Principles for design and selection
f
EN 60204-1, Safety of machinery. Electrical equip-
ment of machines. General requirements
The evaluation unit must be used only in conjunc-
tion 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.
Important! The devices permit a safety-related
stop function, initiated by a safety guard according
to Table 8 - EN ISO 13849-1: 2008-12.
The safety-related function of the safety system is
the opening of the output contacts (13/14, 23/24)
when the actuator is absent.
The user is responsible for the integration of
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 operating
parameters (see Technical data). If a product data
sheet is included with the product, the information
on the data sheet applies in case of discrepancies
with the operating instructions. Only components
may be used that are permissible 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 switches fulfill personal protection functions.
Incorrect installation or tampering can lead to severe
injuries to personnel.
Check the safe function of the safety guard par-
ticularly
f
after any setup work
f
each time after replacement of a CMS component
f
after an extended period without use
f
after every fault
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 switches must not be bypassed (bridging
of contacts), turned away, removed or otherwise
rendered ineffective. Pay particular attention to
EN ISO 14119: 2013, section 7, regarding the
possibilities for bypassing an interlocking device.
The auxiliary contact 31/32 for the evaluation unit
CMS-E-FR must not be used as a safety contact.
The device is only allowed to be installed and placed
in operation by authorized personnel
f
who are familiar with the correct handling of safety
components
f
who are familiar with the applicable EMC regula-
tions
f
who are familiar with the applicable regulations on
health and safety and accident prevention
f
who have read and understood the operating
instructions.
Function
The safety switch CMS consists of an evalua-
tion unit, read head and actuator and is only
functional in specific combinations (see com-
bination options)!
The evaluation unit CMS-E-FR is used for monitoring
from one to six safety doors.
The read heads CMS-R-… have electrically separate
reed contacts with NC contacts and NO contacts.
The read heads CMS-RH-… are based on Hall
sensors with electrically separate outputs with NC
contacts and NO contacts.
If the actuator is in the operating distance, 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 sec-
tion LED indicators). Due to the NC/NO contact
combination in the read head, the evaluation unit
expects to receive antivalent signal changes. If the
actuators for all the read heads connected are in
the operating distance, safety contacts 13/14 and
23/24 are closed. The additional auxiliary contact
31/32 is opened.
The evaluation unit converts this information and
transfers the safety guard state to the control
system via a safety contact.
When the safety door is opened or closed, the evalu-
ation 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 contacts remain in
the open state.
The position of each door (actuators in the operating
distance of the read head) can be determined via six
additional monitoring outputs (O1 to O6).
The monitoring outputs can be connected to a PLC.
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. A start button
can also be connected to the evaluation unit. Four
connection variants are possible here:
f
Manual start using start button with falling edge
and connected feedback loop
f
Manual start using start button with rising edge
and connected feedback loop
f
Automatic start with connected feedback loop
f
Automatic start without feedback loop
f Manual start using start button with falling edge
and connected feedback loop
In the case of a monitored feedback loop, safety
contacts 13/14 and 23/24 are only activated if all
connected read heads are in operating distance,
feedback loop Y1/Y2 is closed and the start button
is released after actuation. The safety contacts are
closed only when the start button is released. The
start pulse is monitored by the system.
f Manual start using start button with rising edge
and connected feedback loop
In the case of a monitored feedback loop, safety
contacts 13/14 and 23/24 are only activated if all
connected read heads are in operating distance,
feedback loop Y1/Y3 is closed and the start button
is pressed. The safety contacts are closed when the
start button is pressed. The start pulse is monitored
by the system.
f Automatic start with connected feedback loop
If a start button is not to be included in the feedback
loop, the feedback loop must be connected to ter-
minals Y1 and Y3. Here too, safety contacts 13/14
and 23/24 are activated only when all connected
read heads are in operating distance and feedback
loop Y1/Y3 is closed.
f Automatic start without feedback loop
In case of automatic start without a feedback loop,
a 2-pin bridge must be connected to Y1 and Y3.
f Fault detection by the unit
The CMS-E-FR is a self-monitoring system unit. Faults
and short circuits in the read head or internal faults
in the evaluation unit will be detected and the safety
circuit will be reliably switched off. Internal linking of
the relay in the evaluation unit prevents the machine
starting up in the event of a fault.
f Connection of electromechanical safety switch-
gear (safety switches, emergency stop, ...)
Unlike evaluation unit CMS-E-BR, evaluation unit CMS-
E-FR does not enter the fault state if the contacts do
not switch simultaneously when the door is closed.
This also permits mechanical safety switches with
NC/NO contact combination (e.g. emergency
stop switch) to be connected to evaluation unit
CMS-E-FR...
f Connection of CMS read heads
f
Safety contacts 13/14 and 23/24 and the auxiliary
contact 31/32 only switch on when the actuator
is moved back into switch-on distance s ao , if the
switch-off distance is exceeded (see combination
options table) when the actuator is moved out of
the operating distance.
f
If the actuator is moved slowly toward the read
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 switch-off distance.