EUCHNER CES-A-F1B-04B-AS1 - Handbuch (Seite 4)

Operating Instructions Evaluation Unit CES-A-F1B-04B-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
IEC 62061, Safety of machinery - Functional safety
of safety-related electrical, electronic and program-
mable electronic control systems.
Correct use includes compliance with the relevant re-
quirements for installation and operation, particularly
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 fulfill a personal protection function.
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 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. It is possible to connect 1 ... 4 read heads to
the M12 sockets. Each delivered actuator possesses
a unique electronic coding and so is a unique element
in the system used. The code in an actuator cannot
be reprogrammed.
The read heads are fastened to the fixed part of the
safety guard. The actuators attached to the movable
part of the safety guard are 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.
Polling the door position using parameter
bits
The status of each activated input can be polled with
the aid of the parameter bits P0 ... P3. If the actuator
is in the read head’s operating distance (door closed),
the related parameter bit is set to HIGH. The follow-
ing allocation applies: P0=IN1, P1=IN2 etc. At www.
euchner.de you can download an example program
that describes the parameter polling by the master.
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.
Unused inputs 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
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 read heads to the CES inputs 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).
Figure 1: Socket assignment (view of connection side)
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
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.
During setup, the parameters are set in the evaluation
unit by the user using a teach-in operation (number
of connected read heads, assignment of the actua-
tors to the read heads). During this process the read
heads are activated.
These configuration parameters are saved in the
non-volatile memory in the evaluation unit.
To trigger a teach-in operation, the user must perform
the following actions in the stipulated order:
1. Prepare for teach-in operation
f
Isolate device from the AS-Interface bus
f
Unscrew right blanking cover (DIP switch for
the teach-in mode) and set DIP switch 1 to ON.
The device is then switched to the teach-in
mode.
2. Unscrew left blanking cover and set required
configuration on the DIP switches for the read
head activation (see following table)
Switch OFF ON
1 no read head on IN1 read head on IN1
2 no read head on IN2 read head on IN2
3 no read head on IN3 read head on IN3
4 no read head on IN4 read head on IN4
3. Close all doors to be monitored (the actuators
must be in the operating distance of the related
read head)
4. Start teach-in operation
f
Connect device to the AS-Interface bus
f
Wait for self-test (STATE LED flashes for ap-
prox. 10 seconds at 15 Hz)
f
Teach-in operation starts (STATE LED flashes at
approx. 1 Hz)
f
Wait for acknowledgement of the teach-in
operation (STATE LED goes out after approx.
10 seconds)
5. End teach-in operation
f
Isolate device from the AS-Interface bus for at
least 10 seconds
f
Set DIP switch for the teach-in mode back to
OFF and re-fit blanking cover. The device is
then switched back to normal operation.
f
Connect device to the AS-Interface bus
f
Wait for self-test (STATE LED flashes for ap-
prox. 10 seconds at 15 Hz)
Addressing
The device address can be set using either the AS-
Interface safety bus or using the addressing socket
on the device.
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