EUCHNER ESM - Manual (Page 4)

Operating Instructions Read Heads/Actuators for Safety Relays ESM
EUCHNER GmbH + Co. KG Kohlhammerstraße 16 D-70771 Leinfelden-Echterdingen Tel. +49 711 7597-0 Fax +49 711 753316 [email protected] www.euchner.de
Correct use
In combination with the safety relays ESM‑BA2.. and
ESM‑BA3.. the Coded Magnetic read heads and
switches series CMS are suitable for use as safety
devices for monitoring movable safety guards ac‑
cording to EN 1088 and EN 60947‑5‑3.
To use the read heads CMS‑R‑AZA..., CMS‑R‑AZC...
and CMS‑R‑BZB... in category 4 with Performance
Level e acc. to EN ISO 13849‑1, the evaluation
must be undertaken using the related EUCHNER
safety relays ESM.
This combination prevents the occurrence of dan‑
gerous machine movements while the safety guard
is open. A stop command is triggered if the safety
guard is opened during the dangerous machine
function.
Before safety components are used, a risk assess‑
ment must be performed on the machine, e. g., in
accordance with:
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.:
f
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 read heads and actuators must be used only
with the designated evaluation units from EUCHNER.
On the use of different evaluation units, EUCHNER
provides no warranty for safe function.
Important! The user is responsible for the integra‑
tion 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.
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. On this topic pay attention in
particular to the measures for reducing the possi‑
bility of bypassing from EN 1088:1995+A2:2008,
Section 5.7.
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 CMS consists of a read head and actuator
and is only functional in specific combinations
(see combination options)!
The read head connected to the evaluation unit con‑
tains reed contacts that are activated by the coded
magnetic actuators. The evaluation unit converts this
information and transfers the safety guard state to
the control system.
Mounting
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.
Caution! Read heads or actuators must not be
used in an environment with strong magnetic fields.
Important! Read heads and actuators must be
positively mounted on the safety guard, e.g. by us‑
ing the safety screws supplied. Tighten the screws
with a torque of max. 0.5 Nm.
Important! The M8 plug connector must be tight‑
ened with a suitable tool.
The read head and actuator may be installed in any
position. The alignment of the read head and the
actuator must be kept in mind (see Figure 1).
Install read head and actuator so that:
f
they are accessible for inspection work and the
installation of spare parts
f
when the safety guard is closed, the active read
head and actuator faces are exactly aligned (see
figure 1)
f
the actuator is located in the read head's operating
distance when the safety guard is closed.
f
A guide and an additional end stop must be fitted
to the moveable part of the safety guard.
f
A latching mechanism must be provided for the
safety door in the closed position.
f
If the read head and actuator are fitted flush,
the switching distance is reduced in line with the
installation depth and the safety guard material.
f
If the read head and actuator are fitted on ferro‑
magnetic material, the read distance is reduced.
f
If the approach speed between the read head and
the actuator is low, the approach direction Z (see
Figure 1) should be avoided.
Electrical connection
Warning! In case of an error, loss of the safety
function through incorrect connection.
Both switching contacts on the read head must be
evaluated separately.
The evaluation unit must undertake the short circuit
monitoring on the read head connected.
Lay the connection cables with protection to prevent
the risk of short circuits.
Caution! Risk of damage to equipment or malfunc‑
tions as a result of incorrect connection.
On read heads with LEDs the current on the contact
status indication is not allowed to be greater than
20 mA.
The read heads must be connected to the evalu‑
ation units in accordance with the wiring diagram
(see operating instructions for evaluation units).