Kl2521-Xxxx - Technical Data; Basic Function Principles - Beckhoff KL2521 Series Documentation

2.2

KL2521-xxxx - Technical data

Technical Data
Number of outputs
Load type*
Rated load voltage*
Max. output current
Base frequency
Duty factor
Resolution
Ramp calculation
Output cycle time
Dead time
Number of inputs
Input current
Electrical isolation
Current consumption from the K-bus typ. 50 mA, max. 120 mA (load-dependent)
Input process image
Output process image
Weight
Permissible ambient temperature
range during operation
Permissible ambient temperature
range during storage
Permissible relative humidity
Dimensions (W x H x D)
Mounting [} 13]
Vibration / shock resistance
EMC immunity / emission
Protection class
Installation position
Approval
*) dependent on the hardware version of the terminal, see chapter Connection [} 22]
2.3

Basic Function Principles

The KL2521 output terminal generates a binary signal with a variable frequency. The peripheral side of the
electronics is electrically isolated from the internal K-bus, and therefore also from the fieldbus. The output
frequency can be adjusted. 16-bit values (signed integer) can be provided for this adjustment through the
controller's process image. These values modify the output frequency from zero up to a pre-selected
maximum frequency in equal increments -> there are 32767 (15 bits) steps in each direction (right/left).
In contrast to the KL2521, on the KL2521-0010 terminal the two inputs +T and +Z are not available any
more. Instead of that, the KL2521-0010 is equipped with additional outputs.
The outputs T and Z can be set via the CONTROL byte (CONTROL.4 and CONTROL.5).
Afterwards, the signals can be read back from the terminal. They will be displayed in the STATUS byte and
transmitted directly to the PLC (STATUS.4 and STATUS.6).
The outputs are realized by MOSFET switches and can switch AC and DC voltages. The maximum current is
100 mA. DC voltages can be switched positive and negative.
Process image
In the delivery state the KL2521 terminal occupies 3 bytes in the process image. The mapping of the KL2521
can be set by means of the controller or by the Bus Coupler's configuration interface using the Beckhoff
KS2000 configuration software.
KL2521
KL2521-0000
1 channel (2 differential outputs A, B)
KL2521-0010: 2 additional outputs 230 V
Ohmic, optocoupler, differential inputs
5 V internal
DC
50 mA, RS485 specification
100 Hz ... 500 kHz, default: 50 kHz
50 %
16 bits over one word in the fieldbus, 24 bits usable altogether
2 ms / step
1 ms (synchronous to K-bus)
0.6 ms after K-bus cycle
2 (+T, +Z)
2.3 mA to 2.8 mA at 5 V to 30 V
500 V (K-bus/field voltage output / input)
24 bits (16 bits input data, 8 bits status)
24 bits (16 bits output data, 8 bits control)
approx. 50 g
0°C ... + 55°C
-25°C ... + 85°C
95%, no condensation
approx. 15 mm x 100 mm x 70 mm (width aligned: 12 mm)
on 35 mm mounting rail conforms to EN 60715
conforms to EN 60068-2-6 / EN 60068-2-27,
see also installation instructions [} 17] for terminals with enhanced mechanical load capacity
conforms to EN 61000-6-2 / EN 61000-6-4
IP20
variable
CE
ATEX [} 25]
CULus
Version: 2.1
KL2521-0010
, 100 mA (+T, +Z)
AC/DC
-
Product overview
KL2521-0024
5 V - 24 V , external supply
DC DC
max. 0.5 A
2 (+T, +Z)
CE
CULus
9