1-channel pulse train output terminal RS422/24 V DC KL2521
Signal LED A
Signal LED B
Signal LED T
Signal LED Z
Ground T, Z
Top view 
Contact assembly 
extended shock and vibration range

KL2521 | 1-channel pulse train output terminal RS422/24 V DC

The KL2521 output terminal alters the frequency of a binary signal and (electrically isolated from the K-bus) outputs it. The frequency is preset by a 16 bit value from the automation unit. The output stage is RS422 compatible and, in the version KL2521-0024, can be driven with 24 V DC signals. The Bus 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 KL2521 | KS2521 KL2521-0024
Number of inputs 2 (+T, +Z)
Load type RS422 input 24 V DC inputs
Signal voltage RS422 level 24 V DC (externally supplied)
Max. output current RS422 specification 0.5 A
PWM clock frequency 1…500 kHz, 50 kHz default
Duty factor 50 % (±20 %)
Resolution max. 15 bit
Electrical isolation 500 V (K-bus/field potential)
Current consumption K-bus typ. 50 mA, max. 120 mA (load-dependent)
Bit width in the process image 24 inputs/outputs: 1 x 16 bit data, 1 x 8 bit control/status
Configuration configuration via Bus Coupler or controller
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 KSxxxx Bus Terminals
Approvals CE, UL, Ex CE, UL
Special terminals
KL2521-0010 with additional outputs (230 V AC/DC, 100 mA) instead of the additional inputs of the default variant