2-channel digital input terminal with time stamp, 5 V inputs EL1252-0050
Signal LED 2
Signal LED 1 
Power contact
+5 V
Power contact 0 V
Power contact PE
Input 1
Input 2
+5 V
0 V
Top view 
Contact assembly 
XFC – eXtreme Fast Control
extended shock and vibration range

EL1252-0050 | 2-channel digital input terminal with time stamp, 5 V inputs

The EL1252-0050 2-channel digital input terminal is designed for 5 V signals but has the same XFC properties as the EL1252. The switching thresholds of the input circuit are based on the CMOS level: signal voltage “0” < 0.8 V, signal voltage “1” > 2.4 V.

Technical data EL1252-0050
Connection technology 4-wire
Number of inputs 2
Nominal voltage 5 V DC
“0” signal voltage < 0.8 V
“1” signal voltage > 2.4 V
Input current typ. 50 µA
Input filter typ. < 1 µs
Oversampling/multi-timestamping factor
Resolution timestamp 1 ns (channel 0/1)
Precision of timestamp in the terminal 10 ns (+ input delay)
Internal sampling/execution 10 ns (+ input delay)
Distributed clock precision << 1 µs
Input delay TON/TOFF < 1 µs
Distributed clocks yes
Time resolution signal 1 ns
Current consumption power contacts typ. 6 mA + load
Current consumption E-bus typ. 90 mA
Electrical isolation 500 V (E-bus/field potential)
Bit width in the process image 2 inputs + 36 byte timestamp
Configuration no address or configuration setting
Special features time stamp, latch last edge
Weight approx. 55 g
Operating/storage temperature 0…+55 °C/-25…+85 °C
Relative humidity 95 %, no condensation
Vibration/shock resistance conforms to EN 60068-2-6/EN 60068-2-27
EMC immunity/emission conforms to EN 61000-6-2/EN 61000-6-4
Protect. class/installation pos. IP 20/variable
Approvals/markings CE, UL, ATEX
Ex-Marking II 3 G Ex nA IIC T4 Gc
Related products
EL1252 2-channel digital input terminal 24 V DC, filter 1 µs, with timestamp
EL9505 Power supply terminal, 5 V DC, with diagnostics
Further information  
XFC eXtreme Fast Control Technology