Beckhoff EL1918 Operating Instructions

Product description
EL1918 17Version: 1.2.0
3.3 Technical data
Product designation EL1918
Number of inputs 8
Status display 12 (one green LED per input + 4 DIAG LEDs)
Reaction time (read input/write to E-bus) typically: 4ms,
maximally: see error reaction time
Fault response time ≤ watchdog time
Cable length between sensor and terminal unshielded max. 100m (0.75 or 1mm²)
shielded max. 100m (0.75 or 1mm²)
Output current of the clock outputs typically 3mA, max. 6.5mA
Input process image 7bytes
Output process image 6bytes
Supply voltage of the EL1918 (PELV) 24V
DC
(–15%/+20%)
Signal voltage "0" inputs
-3V ... 5V (EN61131-2, type 3) see chapter Characteristic curve
of the inputs [}19]
Signal voltage "1" inputs
11V ... 30V (EN61131-2, type 3) see chapter Characteristic
curve of the inputs [}19]
Current consumption of the module electronics at 24V (without cur-
rent consumption of sensors)
8 channels occupied: typically 29.6mA (@28.8V
DC
)
0 channel occupied: typically 2.27mA (@28.8V
DC
)
Current consumption via E-bus 8 channels occupied: approx. 165mA
Power dissipation of the terminal typically 1.6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) 12 mm x 100 mm x 68 mm
Weight approx. 50g
Permissible ambient temperature (operation)
-25°C to +55°C (note chapter Temperature measurement
[}23])
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 contamination level
according to EN 60664-1
Contamination level 2
(note chapter Maintenance [}48])
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
contamination of the TwinSAFE component
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 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 [}22]
Approvals CE, TÜV SÜD

Beckhoff EL1918 Specifications

General

Brand	Beckhoff
Model	EL1918
Category	Touch terminals
Language	English