1-channel pulse train output terminal RS422/24 V DC EL2521
Signal LED Z
Signal LED T
Run LED 
Signal LED B 
Signal LED A 
Power contact
Power contact
+A
+B
+T
Ground T, Z
-A
-B
+Z
Shield
Top view 
Contact assembly 
extended shock and vibration range

EL2521 | 1-channel pulse train output terminal RS422/24 V DC

The EL2521 output terminal alters the frequency of a binary signal and (electrically isolated from the E-bus) outputs it. The frequency is preset by a 16 bit value from the automation unit. The output stage is RS422-compatible. In the version EL2521-0024 it can be driven with 24 V DC signals. The terminal indicates its signal state by means of light emitting diodes. The LEDs are driven in time with the outputs and each displays an active output.

Technical data EL2521 | ES2521
Connection technology pulse train (frequency output)
Number of outputs 1 channel (2 differential outputs A, B)
Number of inputs 2 (+T, +Z)
Load type ohmic, min. 220 Ω
Distributed clocks yes
Input specification 24 V DC
Output specification RS422, differential
Signal voltage RS422 level
Max. output current RS422 specification, 50 mA
Short circuit current short-circuit-proof
Base frequency 0…500 kHz, 50 kHz default
Resolution max. 15 bit (16 bit + sign)
Step size 10 mHz
Current consumption E-bus typ. 280 mA (load-dependent)
Electrical isolation 500 V (E-bus/field potential)
Current consumption power contacts
Bit width in the process image 14 byte output, 8 byte input
Configuration configuration via controller
Special features different modes, ramp function, travel distance control
Weight approx. 50 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
Pluggable wiring for all ESxxxx terminals
Approvals CE, UL, Ex
Special terminals
EL2521-0024 24 V version
EL2521-0025 pulse train output, 24 V DC (supplied from an external source), n-switching
EL2521-0124 24 V version, with Capture/Compare input/output