Beckhoff EL1904 User Manual download pdf (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

(–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

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

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