3
• Read these operating instructions thoroughly before putting the device into oper-
ation and keep them for future reference.
• The assembly, commissioning, modifications and extensions may only be complet-
ed by an experienced electrician!
• Before commencing work, remove the power supply from the device/installations!
• During the operation of electrical components
– e. g. in the case of a short circuit hot and ionised gases can be emitted
– protection covers must not to be removed!
• Pay attention to all local relevant electrical safety regulations!
• Disregard of the safety regulations can cause death, severe injuries or extensive
damage!
• For 24 VACDC supply voltage must be obtained from a safety trafo according to
EN 61558. The wiring must be protected against mechanical damage.
• It is the responsibility of the equipment manufacturer to carry out a risk assessment
and to install both the detector and the equipment in compliance with applicable
national and international regulations and safety standards, as well as the Machin-
ery Directive 2006/42/EC, should this apply.
• It is recommended that the resistance of the sensor is measured on the terminals 1 and 2
as well as 3 and 4. This should be between 7.5 and 9.0 kOhm with a non-activated sensor
(typical 8.2 kOhm)
• Check that the power supply is in accordance with the value indicated on the type plate of
the unit
• If one or more sensors are activated both yellow LED’s “Safety Function” illuminate and
both signal output relay de-enegise. The sensors must now be activated at various posi-
tions whereby both yellow LED’s must illuminate each time. The signal output relays re-
main de-energised
• Push the external reset button (ESD3-05/06/09), minimum 1 second.
• If a terminal of the sensor input (e.g. 1) opened and the sensor connection is disconnected
the sensor output relays will de-energise and the red LED’s “System Error” illuminate.
• If the terminal is subsequently closed the fault condition remains until the external reset
button is pressed (ESD3-05/06/09), or the power supply is disconnected for a few seconds
The switching unit is designed to be installed on a horizontally mounted mounting rail.
Assembly
A)
Place the unit (1) at a slight angle with the guides (2) on the rail (3)
(Rail 35 mm according to EN 50022)
B)
Push the unit (1) onto the rail (3) until the lock (4)
Removal
C)
Place a screwdiver (5) on the red lock
D)
Unlock the unit by turning or levering the screwdriver
E)
Lift the unit and remove from the rail
The ESD3 variants are distinguished firstly by their reset function and secondly by the con-
figuration of the status relay contact. This can be implemented off-load both as open and
closed. It is not a safety contact, but is exclusively used for transmitting information. It is not
monitored for failure and must never be used for safety shutdown in any form whatsoever.
Before commencing the installation or assembly complete the following safety precautions:
Limited protection against accidental contact!
• Check the voltage data on the type plate of the switching unit.
• Remove the power supply from the units/installation!
• Determine that the power supply is disconnected!
• Ensure that the units/installations can not be switched on!
• Protect the device with a housing against contamination or aggressive environ-
ments!
• Separate or cover neighbouring components which are connected to the power
supply!
• Disconnect device from mains in the event of a fault.
E
A
1
2
3
4
5
C
D
B
45
79
105
Power
Safety
Stop
Sensor
Error
ESD3
45
79
105
Power
Safety
Stop
Sensor
Erro
r
ESD
3
Plug-in terminals with
cage clamps
Stick-on labels in different
languages
Connected sensors have a terminal resistance of 8.2 kOhm and are monitored for changes in
the flowing no-load current. In the non-activated condition all relays are energised.
When one or more sensors are
activated
• the total resistance of the activated sensor system sinks towards zero ohm
• the value falls below the defined threshold
• the “safety” relay is de-energised
• the yellow LED’s illuminate
When an
Error
occurs in the sensor circuit (cable breakage, sensor malfunction)
• the total resistance of the corresponding sensor system rises
• the defined switching limit is exceeded
• the “safety” relay is de-energised
• the red and yellow LED’s illuminate
The
switching unit
is
reset
as follows
• by pressing an external reset button (ESD3-05/06/09)
→
external reset,
• as soon as the sensor is no longer actuated (ESD3-03/04/08)
→
auto reset,
• when the electrical power supply is interrupted.
The recovery time is < 1 sec., then the green LED lights up.
ESD3 switching units are used for monitoring pressure sensitive protective devices from the
manufacturer (for contact mats acc. to EN ISO 13856-1, for safety edges acc. to
EN ISO 13856-2). They meet the requirements of standard EN ISO 13849-1 for protective
equipment up to PL e, Cat. 3, if the drive is directly connected to the ESD3.
The ESD3 is fail-safe (single fault) and has two input channels with redundant evaluation.
Each channel controls a positively driven relay. During each switching operation, the relays
test themselves by means of contact feedback.
Type
Reset
Status relay
Voltage supply variants
auto extern
Signalling
contact
M
Fault
contact
SM
Signalling
contact
D
24VACDC 115VAC 230VAC
ESD3-03
X
X
X
X
ESD3-04
X
X
X
X
X
ESD3-05
X
X
X
ESD3-06
X
X
X
ESD3-08
X
X
X
ESD3-09
X
X
X
Status
relay
contact
closed
when:
Sensor not
actuated
Sensor not
actuated
Sensor
actuated
Sensor
actuated
Fault
De-energised
Safety Instructions
1
Product Description
2
Commissioning
3
Assembly and Removal
4
Translation of the original instructions
2.1
Configuration variants
2.2
Function
Änderungen vorbehalten
ESD3
Switching Unit
DE
EN
FR
209471S
08/19
