BECKHOFF EL1904 - Manual (Page 16)

Product description
14 EL1904
3.3 Technical data
Product designation EL1904
Number of inputs 4
Status display 4 (one green LED per input)
Reaction time
(Read input/write to E-bus) typically: 4 ms,
maximally: see error reaction time
Error reaction time ≤ watchdog time
Cable length between
sensor and terminal (unshielded) 100 m max.(at 0.75 or 1 mm²)
(shielded) 100 m max.(at 0.75 or 1 mm²)
Output current of the clock outputs typically 10 mA, max. 15 mA
Input process image 6 bytes
Output process image 6 bytes
EL1904 supply voltage (PELV) 24 V
DC
(–15% / +20%)
Signal voltage "0" inputs -3 V ... 5 V (EN 61131-2, type 3) see section 3.4
Signal voltage "1" inputs 11 V ... 30 V (EN 61131-2, type 3) see section 3.4
Current consumption of the modular electronics
at 24 V (without current consumption of sensors) 4 channels occupied: typically 12 mA
0 channels occupied: typically 1.4 mA
Current consumption from the E-bus 4 channels occupied: approx. 200 mA
Power dissipation of the terminal typically 1 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 common operating conditions) insulation tested with 500 V
DC
Dimensions (W x H x D) 12mm x 100mm x 68mm
Weight approx. 50 g
Permissible ambient temperature (operation) up
to SW 05 0°C to +55°C (see notes in section 4.1.3 Mechanical
installation)
Permissible ambient temperature (operation)
from SW 06 (CW 02/2014) -25°C to +55°C (see notes in section 4.1.3
Mechanical installation)
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
Climate category according to EN 60721-3-3 3K3
Permissible level of contamination according to
EN 60664-1 level of contamination 2
(comply with the chapter Cleaning)
Impermissible operating conditions TwinSAFE terminals must not be used under the
following operating conditions:
 under the influence of ionizing 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
Permitted operating environment control cabinet or terminal box with minimum
protection class IP54 according to IEC 60529