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ESD3
Switching device
Translation of the original instructions
1
Safety instructions
• Read these operating instructions carefully before operating the device and keep them
for future use.
• Only use this product for its intended purpose.
• Only trained and qualified personnel may install and initialise the device.
• Only authorised factory personnel may make changes to the hardware/software or
repairs to the product.
• Observe the locally applicable electrical safety regulations.
• Failure to follow these safety precautions can cause damage to the device or other
property and result in serious injury or death.
• It is the responsibility of the equipment manufacturer to carry out a risk assessment
and to install the system in compliance with applicable local, national and international
provisions, safety standards, regulations and laws as well as the Machinery Directive
2006/42/EC, should this apply.
• Observe all local, national and international standards, regulations and laws relating to
safety.
• Always consider the safety-relevant functions of your application as a whole, never just
in relation to one individual section of the system.
• The installer is responsible for testing the system and ensuring that it meets all applica-
ble safety standards.
• If the safety equipment is not required at least once a month during operation, it must
be checked automatically or manually by the operator at least once a month.
• During operation of electrical components – hot and ionised gases may escape, e.g. in
the event of a short circuit; protective covers may not be removed!
• The 24 V AC/DC device may only be operated from a safety extra-low voltage (SELV)
system with safe electrical separation in accordance with EN 61558.
• The wiring must be protected against mechanical damage.
Prior to starting installation or mounting, take the following safety precautions:
• Check the voltage data on the label of the switching device.
• Ensure that the device/system cannot be switched on.
• Ensure that the power supply is disconnected.
• Protect the device from contamination and aggressive ambient conditions with a
housing!
• Cover any neighbouring live parts or remove them!
• Disconnect device from mains in the event of a fault.
• Avoid touching any electronic components.
• Limited shock protection!
2
Intended use
The ESD3 switching devices are used to monitor the manufacturer's pressure-sensitive pro-
tection system (for contact mats according to EN ISO 13856-1, for edges according to
EN ISO 13856-2). They comply with the requirements of standard EN ISO 13849-1 for protec-
tion systems up to PL e, Cat. 3, when drives are connected directly to the ESD3.
The service life of the safety switching device is to be determined by the installer on the basis
of the specified usage category, current and maximum cycles.
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.
105
2.1
Configuration variants
The ESD3 variants are distinguished firstly by their reset function and secondly by the configu-
ration 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 monito-
red for failure and must never be used for safety shutdown in any form whatsoever.
45
Spring cage terminals
Power
Safety
Stop
Stick-on labels
Sensor
ESD3
Error
various languages
Reset
Type
exter-
Signalling
auto
nal
contact M
ESD3 -03
X
ESD3 -04
X
X
ESD3 -05
X
ESD3 -06
X
X
ESD3 -08
X
ESD3 -09
X
Sensor
not actuated
Status relay
contact clo-
sed when:
2.2
How it works
Connected sensors are monitored for a change in the flowing quiescent current with a termi-
nating resistor of 8.2 kΩ. All relays pick up in the idle state.
If one or several sensors are actuated
• the total resistance of the actuated sensor system falls towards zero Ohm
• the defined switching threshold is undershot
• the "Safety" relays drop out
• the yellow LEDs light up
In the event of a fault in the sensor circuit (wire break, sensor failure...)
• the total resistance of the corresponding sensor system increases
• the defined switching threshold is exceeded
• the "Safety" relays drop out
• the red LEDs light up
The switching device is reset as follows
• by pressing an external reset button (ESD3 -05/06/09)
• as soon as the sensor is no longer actuated (ESD3 -03/04/08)
• when the electrical power supply is interrupted.
The recovery time is <1sec, after which the green LED lights up.
3
Commissioning
• It is recommended to measure the resistance values of both sensors before connecting at
terminals 1/2 and 3/4. If the sensors are not actuated, the resistance values should be
between 7.5 and 9.0 kΩ (typically 8.2 kΩ)
• Check the voltage data on the type plate of the switching device
• If one or more sensors are actuated, both yellow "safety-relevant function" LEDs will be lit
and both signal output relays will drop out. Now, the sensors at various positions must be
actuated and both of the yellow LEDs should light up. The sensor relays remain dropped
out
• Press the external reset button (ESD3 -05/06/09), for at least 1 sec.
• If one terminal of each sensor input (e.g. 1) is now opened and the sensor connection is
interrupted, the signal output relays will drop out and the red "system error" LEDs will be
lit.
• When the terminal is connected again, the fault condition will remain until the external
reset button is pressed (ESD3 -05/06/09) or the supply voltage is interrupted for a few se-
conds.
4
Installation and dismantling
The switching device is designed to be installed on a horizontally mounted mounting rail.
A
Mounting
A) Place the device (1) slightly tilted with the guide (2) on the mounting rail (3)
B) Press the device (1) onto the mounting rail (3) until the bolt (4) engages
Dismantling
C) Insert the screwdriver (5) into the red bolt
D) Release the device by turning or lifting up the screwdriver
E) Tilt the device and remove it from the mounting rail
Voltage variants
Status relay
Fault contact
Signalling
24 V
115 V
SM
contact D
AC/DC
AC
X
X
X
X
X
X
X
X
X
X
X
Sensor
not actuated
Sensor
Sensor
actuated
actuated
Fault
De-energised
external reset,
→
auto reset,
→
E
1
2
3
4
B
C
5
D
209471T
04/21
230 V
AC
X
X
3
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