EUCHNER CES-A-V1B-01B-AS1 - Handbuch (Seite 4)

Operating Instructions Evaluation Unit CES-A-V1B-01B-AS1
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
The Coded Electronic Safety switches series CES...
AS1 from EUCHNER are operated as slaves on the
safety bus AS‑Interface Safety at Work and are safety
devices for monitoring movable safety guards.
In combination with a separating safety guard and
the machine control, this safety component prevents
dangerous machine movements from occurring while
the safety guard is open. A stop command is triggered
if the safety guard is opened during the dangerous
machine function.
Before safety switches are used, a risk assessment
must be performed on the machine in accordance
with e.g.
f
EN ISO 13849-1, Safety related parts of control
systems, annex A
f
EN ISO 12100, Safety of machinery - Basic con-
cepts - General principles for design - Risk assess-
ment and risk reduction
Correct use includes compliance with the relevant re-
quirements for installation and operation, in particular
f
EN ISO 13849, Safety related parts of control
systems
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 assured properties only apply in conjunction with
CES system actuators from EUCHNER. The use of
other actuators can result in the loss of the safety
function.
Only read heads that are permissible according to
Table 3 may be connected.
Safety precautions
Safety switches perform a personal protection func-
tion. Incorrect installation or tampering can lead to
severe injuries to personnel.
Safety switches must not be bypassed (bridging
of contacts), turned away, removed or otherwise
rendered ineffective.
As the unique actuator codes are not evaluated,
the CES-A-V... version can only be used for ap-
plications in which a hazard cannot result from
possible tampering with the system.
The switching operation must only be triggered
by actuators specifically provided for this pur-
pose which are permanently connected to the
safety guard.
A complete safety-oriented system generally
consists of several signaling devices, sensors,
evaluation units and concepts for safe shutdown.
The manufacturer of a machine or installation is
responsible for correct and safe overall function.
All safety precautions and specifications in the
operating instructions for the AS-Interface safety
monitor must be observed.
The safety switch CES...AS1 meets the following
safety requirements
f
Redundant design of the circuit in the evaluation
unit with self-monitoring
f
As a result the safety system is still effective even
if a component fails
Function
The non-contact safety switch CES…AS1 consists of
three components:
f
Coded actuator
f
Read head
f
Evaluation unit
The evaluation unit is integrated in a housing with a
connection to the safety bus AS-Interface Safety at
Work. The read head is connected to an M12 socket.
Every EUCHNER actuator supplied has an electronic
coding (unique coding) that is read by the read head.
Only if a correct coding is detected does the system
accept the actuator. The code in an actuator cannot
be reprogrammed.
Unlike systems with unique code detection, on the
CES-A-V... a specific code is not requested but instead
it is only checked whether the actuator is of a type that
can be detected by the system (multicode detection).
There is no exact comparison of the actuator code
with the code defined in the evaluation unit (unique
code detection).
The read head is fastened to the fixed part of the
safety guard. The actuator attached to the movable
part of the safety guard is moved towards the read
head by closing the door. When the switch-on distance
is reached, power is supplied to the actuator by the
inductive read head and data transfer can start.
If the system detects a valid actuator, a bit sequence
is sent over the AS-Interface bus; this bit sequence
indicates the safety guard is closed.
Due to the dynamic polling of the actuator and the
redundant, diverse design of the safety electronics,
the evaluation unit will enter the safe state with every
detectable fault.
When the safety guard is opened, the code sequence
0000 is sent over the AS-Interface bus.
The dwell time of an actuator inside and outside the
operating distance must be at least 0.5 seconds.
The state of the system is monitored internally by
two microprocessors. On an internal fault in the
evaluation unit, the safety circuit is switched off and
the OUT/ERROR LED illuminates red. The evaluation
unit is reset to the operating state by disconnecting
the AS-Interface cable.
Mounting and electrical connection
Mounting and electrical connection must be
performed only by authorized personnel.
To ensure the degree of protection IP67 is achieved,
a ribbon cable must be placed in both cable entries.
If the ribbon cable is not connected, the cable section
must be sealed using the sealing caps provided.
If the Output OUT is not used, the socket must be
sealed using the sealing cap provided.
For use and operation as per the
requirements,
a power supply with the feature „for use in class 2
circuits“ must be used. The same requirement ap-
plies to the safety outputs.
Alternative solutions must comply with the following
requirements:
a) Electrically isolated power supply unit with a max.
open-circuit voltage of 30 V/DC and a limited
current of max. 8 A.
b) Electrically isolated power supply unit in combina-
tion with fuse as per UL248. This fuse should
be designed for max. 3.3 A and should be
integrated into the 30 V DC voltage section.
f
Mount bottom of housing with four M6 screws
f
Place yellow AS-Interface ribbon cable correctly
aligned (pay attention to profile) in yellow cable entry
f
For applications with CEM/CET read head (with
magnet), place black ribbon cable for auxiliary
power correctly aligned (pay attention to profile) in
black cable entry
f
Engage fastening straps on the top of the housing
in the corresponding mounting hooks on the bot-
tom of the housing and press onto the base plate
f
Tighten fastening screw
f
Connect the CES or CEM/CET read head to the CES
input IN (M12 socket 5-pin) (see Figure 1)
The screen on the read head’s connection cable
must be connected to pin 3 SH on the CES input IN
(M12 socket 5-pin).
f
Connect the solenoid on the CEM/CET read head
to the Output OUT (M12 socket 5-pin with sealing
cap) (see Figure 1)
Figure 1: Socket assignment (view of connection side)
Addressing
The device address can be set using either the AS-
Interface safety bus or using the addressing socket
on the device.
Important: If you use the addressing socket for set-
ting the address, you must first remove the actuator
from the read area, otherwise the CES...AS1 will
indicate an error.
Configuration in the AS-Interface safety
monitor (refer to the operating instructions for the
AS-Interface safety monitor)
The safety switch is configured in the AS-Interface
safety monitor with the AS-Interface address set as
follows, for example:
f
dual-channel dependent
f
without start-up test
f
synchronization time = 0.5 seconds
Function test
f
Close the safety guard.
f
Start the machine.
f
Machine must stop immediately when the safety
guard is opened!
f
Switch off the machine.
f
Open the safety guard.
f
The machine must not start when the safety guard
is open!
4 3
2 1
5 CES input IN
1
f Not used
2 f H1
3 f SH (screen)
4 f H2
5 f Not used
Output OUT
1
f Not used
2 f Not used
3 f GND
4 f OUT
5 f Not used