EUCHNER CES-A-F1B-01B-AS1 - Handbuch (Seite 4)

Operating Instructions Evaluation Unit CES-A-F1B-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 series CES...AS1 Coded Electronic Safety
switches 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
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.
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 of 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. Each delivered actuator possesses a unique
electronic coding and so is a unique element in the
system used. The code of the actuator cannot be
reprogrammed.
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 can be transferred.
The bit pattern read is compared with the code saved
in the evaluation unit; if the data match, a bit sequence
is sent over the AS-Interface bus indicating 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 M4 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)
Setup/teach-in function for new actuator
Setup must be performed only by authorized
personnel.
The actuator must be allocated to the evaluation unit
using a teach-in function before the system forms a
functional unit. During a teach-in operation, the code
sequence 0000 is sent over the AS-Interface bus, i.e.
the system is in the safe state.
f Teach-in function for first actuator
(default setting on delivery)
1. Connect the device to the AS-Interface bus
f
green LED flashes fast (approx. 4 Hz)
2. Move actuator towards the read head
(Observe distance < S
ao
)
f
teach-in operation starts, green LED flashes
slowly (approx. 1 Hz)
3. Teach-in operation completed
(after 60 seconds)
f
green LED goes out
4. To activate the actuator code from the teach-in
operation in the evaluation unit, the evaluation
unit must then be isolated from the AS-Interface
bus for min. 10 seconds.
f Teach-in function for a new actuator
1. Connect the device to the AS-Interface bus
2. Move new actuator towards the read head
(Observe distance < S
ao
)
f
teach-in operation starts, green LED flashes
(approx. 1 Hz)
3. Teach-in operation completed
(after 60 seconds)
f
green LED goes out, new code saved, old
code deactivated
4. To activate the actuator code from the teach-in
operation in the evaluation unit, the evaluation
unit must then be isolated from the AS-Interface
bus for min. 10 seconds.
f
Repeated teach-in of the same actuator on the
same evaluation unit is not possible.
f
The number of valid teach-in operations on one
evaluation unit is limited to a maximum of 8
f
The evaluation unit can only be operated with the
last actuator taught.
f
A teach-in operation is invalid if:
f
the teach-in operation is cancelled before the
green LED goes out
f
the power supply was switched off during the
teach-in operation
Warning!
After the eighth teach-in operation or if an „old“ ac-
tuator is placed against the read head, the system
automatically switches to the teach-in mode. In
both cases, a teach-in operation with a duration of
60 seconds is started; however, the last actuator
code remains active (see 1 System states). A new
code is not taught.
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
setting 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
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