Beckhoff EL2904 User Manual

Product description
EL2904 21Version: 3.2.2
CAUTION
Note on approval according to EN 81-20, EN 81-22 and EN 81-50
• The release does not apply to the EL1918-2200, EL2911-2200 and EP1957-2222 variants.
• The TwinSAFE components may only be used in machines that have been designed and installed in
accordance with the requirements of the EN60204-1 standard.
• Provide a surge filter for the supply voltage of the TwinSAFE components against overvoltages
(reduction to overvoltage category II).
• EN81 requires that in the case of devices with internal temperature monitoring, a stop must be reached
in the event of an overtemperature. In this case, passengers must be able to disembark (see EN81-20
chapter 5.10.4.3, for example). To ensure this, application measures are necessary. The internal
terminal temperature of the TwinSAFE components can be read out by the user. A direct switch-off
occurs at the maximum permissible temperature of the respective TwinSAFE component (see chapter
Temperature measurement).
The user must select a temperature threshold below the maximum temperature such that a stop can be
reached in all cases before the maximum temperature is reached. Information on the optimum terminal
configuration can be found under Notes on the arrangement of TwinSAFE components and under
Example configuration for temperature measurement.
• For the use of the TwinSAFE components according to EN81-22 and EN81-50, the conditions
described in the manuals for achieving category4 according to ENISO13849-1:2015 must be
observed.
• The use of TwinSAFE components is limited to indoor applications.
• Basic protection against direct contact must be provided, either by fulfilling protection class IP2X or by
installing the TwinSAFE components in a control cabinet which corresponds at least to protection class
IP54 according to EN60529.
• The ambient conditions regarding temperature, humidity, heat dissipation, EMC and vibrations, as
specified in the operating instructions under technical data, must be observed.
• The operating conditions in potentially explosive atmospheres (ATEX) are specified in the operating
instructions.
• The safe state (triggering) of the application must be the de-energized state. The safe state of the
TwinSAFE components is always the de-energized, switched-off state, and this cannot be changed.
• The lifetime specified in the operating instructions must be observed.
• If the TwinSAFE component is operated outside the permissible temperature range, it changes to
"Global Shutdown" state.
• The TwinSAFE components must be installed in a control cabinet with protection class IP54 according to
EN60529, so that the requirement for degree of pollution3 according to EN60664-1 can be reduced to
level2.
• The TwinSAFE components must be supplied by a SELV/PELV power supply unit with a maximum
voltage of U
max
≤36V
DC
.

Beckhoff EL2904 Specifications

General

Brand	Beckhoff
Model	EL2904
Category	Touch terminals
Language	English