BECKHOFF EL1904 User Manual
Digital input
EL1904
Diagnostic 4
Diagnostic 2
Input 4
Input 2
Diagnostic 3
Diagnostic 1
Input 3
Input 1
Power contact
+24 V
Power contact 0 V
Input 1+
Input 1–
Input 3+
Input 3–
Input 2+
Input 2-
Input 4+
Input 4–
Top view
Contact assembly
EL1904 | 4-channel digital input terminal, TwinSAFE,
24 V DC
The EL1904 EtherCAT Terminal is a digital input terminal for sensors with potential-free contacts for 24 V DC. The EtherCAT Terminal has four fail-safe
inputs.
Technical data EL1904
Connection technology 1-/2-wire
Number of inputs 4
Protocol TwinSAFE/Safety over EtherCAT
Response time typ. 4 ms (read input/write to E-bus)
Fault response time ≤ watchdog time (parameterizable)
Current consumption power
contacts
see documentation
Current consumption E-bus typ. 200 mA
Installation position horizontal
Safety standard DIN EN ISO 13849-1:2008 (Cat. 4, PL e) and EN 61508:2010 (SIL 3)
Weight approx. 50 g
Protection class IP 20
Approvals/markings Overview of TwinSAFE Certifications (PDF)
Ex marking II 3 G Ex nA IIC T4 Gc
Download EtherCAT slave
information (ESI)
ESI config file EL19xx (ZIP)
Accessories
Marking and coding printed and unprinted contact lables, coding pins and sockets, slide-in label covers
ZK2000-2200-0xxx M8, socket, straight, female, 3-pin – open end
ZK2020-3200-0xxx M8, socket, straight, female, 4-pin – open end
ZK2000-6200-0xxx M12, socket, straight, female, 4-pin, A-coded – open end
ZK2000-5200-0xxx M12, socket, straight, female, 5-pin, A-coded – open end, 5-wire
Cordsets cordsets and connectors
Digital input
EL1904
Diagnostic 4
Diagnostic 2
Input 4
Input 2
Diagnostic 3
Diagnostic 1
Input 3
Input 1
Power contact
+24 V
Power contact 0 V
Input 1+
Input 1–
Input 3+
Input 3–
Input 2+
Input 2-
Input 4+
Input 4–
Top view Contact assembly
Digital input
EL1904
BECKHOFF New Automation Technology
We reserve the right to make technical changes.
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