Beckhoff EL2904, Operating Instructions Manual

Page: 18 / 51

Product description
EL2904 18 Version: 2.3.0
3.3 Technical data
Product designation EL2904
Number of outputs 4
Status display 4 (one green LED per output)
Fault reaction time ≤ watchdog times
Output current per channel max. 500 mA, min. 20 mA with Current Measurement Active pa-
rameter enabled
Utilization category according to EN 60947-5-1 DC-13
Intended load Pilot Duty
Actuators When selecting actuators please ensure that the EL2904 test
pulses do not lead to actuator switching.
Cable length between actuator and terminal unshielded max. 100 m
shielded max. 100 m
Wire cross-section min. 0.75 mm
2
Input process image 6 bytes
Output process image 6 bytes
EL2904 supply voltage (PELV) 24 V
DC
(–15% / +20%)
(A 10 A fuse should be provided for the potential group)
Protection class III
(by using a SELV/PELV power supply unit)
Overvoltage category II
Current consumption via E-bus approx. 221 mA
Power dissipation of the terminal typically 2 W
Electrical isolation (between the channels) no
Electrical isolation (between the channels and the E-bus) yes
Insulation voltage (between the channels and the E-bus, under com-
mon operating conditions) Insulation tested with 500 V
DC
Dimensions (W x H x D) 24 mm x 100 mm x 68 mm
Weight approx. 100 g
Permissible ambient temperature (operation)
up to SW 03 0°C to +55°C (see notes in chapter Example configuration for
temperature measurement)
Permissible ambient temperature (operation)
from SW 04 (CW 02/2014) -25°C to +55°C (see notes in section Example configuration for
temperature measurement)
Permissible ambient temperature (transport/storage) -40 °C to +70 °C
Permissible air humidity 5% to 95%, non-condensing
Permissible air pressure (operation/storage/transport) 750 hPa to 1100 hPa
(this corresponds to an altitude of approx. -690 m to 2450 m
above sea level, assuming an international standard atmos-
phere)
Climate category according to EN 60721-3-3 3K3
(the deviation from 3K3 is possible only with optimal environmen-
tal conditions and also applies only to the technical data which
are specified differently in this documentation)
Permissible pollution degree
according to EN 60664-1 2
(note chapter
Maintenance [
}
44] )
Inadmissible operating conditions TwinSAFE Terminals must not be used under the following oper-
ating conditions:
• under the influence of ionizing radiation (exceeding the
natural background radiation)
• in corrosive environments
• in an environment that leads to unacceptable soiling of
the Bus Terminal
EMC immunity / emission conforms to EN 61000-6-2 / EN 61000-6-4
Vibration / shock resistance conforms to EN 60068-2-6 / EN 60068-2-27
Shocks 15 g with pulse duration 11 ms in all three axes
Protection class IP20
Equipment type according to EN 61010-2-201 Open equipment
Permitted operating environment In the control cabinet or terminal box, with minimum protection
class IP54 according to IEC 60529
Correct installation position see chapter Installation position and minimum distances
Approvals CE, cULus, ATEX, TÜV SÜD