Función especial CM8281
  • Función especial CM8281

B&R X20CM8281

X20 mixta módulo universal,
4 entradas digitales, 24 VDC, fregadero,
1-cable de conexión,
2 salidas digitales, 0,5 A,
fuente, 1-cable de conexión,
1 entrada analógica,
± 10 V o 0 a 20 mA mA / 4 a 20,
12-bits de resolución,
1 salida analógica,
± 10 V / 0 a 20 mA,
12-bits de resolución,
2 contadores utilizados como un contador de eventos
o por la puerta de medida





Cantidad

  • Política de seguridad (editar con el módulo Información de seguridad y confianza para el cliente) Política de seguridad (editar con el módulo Información de seguridad y confianza para el cliente)
  • Política de envío (editar con el módulo Información de seguridad y confianza para el cliente) Política de envío (editar con el módulo Información de seguridad y confianza para el cliente)
  • Política de devolución (editar con el módulo Información de seguridad y confianza para el cliente) Política de devolución (editar con el módulo Información de seguridad y confianza para el cliente)
Short description X20CM8281
I/O module 4 digital inputs, 2 digital outputs, 1 analog input, 1 analog output, special functions
General information X20CM8281
B&R ID code 0x24C3
Status indicators I/O function per channel, operating state, module status
Diagnostics  
Module run/error Yes, with status LED and software status
Analog inputs Yes, with status LED and software status
Digital outputs Yes, with status LED and software status (output error status)
Power consumption  
Bus 0.01 W
Internal I/O 1.75 W
Additional power dissipation caused by the actuators (resistive) [W] -
Electrical isolation  
Channel - Bus Yes
Channel - Channel No
Certification types  
c-UL-us Yes
CE Yes
GOST-R Yes
Digital inputs X20CM8281
Amount 4
Rated voltage 24 VDC
Input voltage 24 VDC -15% / +20%
Input current at 24 VDC Typ. 3.3 mA
Input filter  
Hardware ≤2 µs
Software Default 1 ms, can be configured between 0 and 25 ms in 0.2 ms intervals
Connection type 1-line connection
Input circuit Sink
Additional functions 20 kHz event counting, gate measurement
Input resistance Typ. 7.18 kΩ
Switching threshold  
LOW <5 VDC
HIGH >15 VDC
Isolation voltage between channel and bus 500 Veff
Event counters X20CM8281
Amount 2
Signal form Square wave pulse
Evaluation Each negative edge, cyclic counter
Input frequency Max. 20 kHz
Counter 1 Input 1
Counter 2 Input 3
Counter frequency Max. 20 kHz
Counter size 16-bit
Gate measurement X20CM8281
Amount 1
Signal form Square wave pulse
Evaluation Positive edge - Negative edge
Counter frequency  
Internal 48 MHz, 24 MHz, 12 MHz, 6 MHz, 3MHz, 1.5 MHz, 750 kHz, 375 kHz, 187.5 kHz
Counter size 16-bit
Length of pauses between pulses ≥100 µs
Pulse length ≥20 µs
Supported inputs Input 4
Analog inputs X20CM8281
Amount 1
Input ±10 V or 0 to 20 mA/4 to 20 mA, using different connection terminal points
Input type Single ended
Digital converter resolution  
Voltage ±12-bit
Current 12-bit
Conversion time 400 µs, conversion runs asynchronous to the X2X Link cycle
Output format UINT
Input impedance in signal range  
Voltage >1 MΩ
Current -
Load  
Voltage -
Current <300 Ω
Max. error at 25°C  
Voltage  
Gain 0.08% 1)
Offset 0.02% 2)
Current  
Gain 0 to 20 mA = 0.08% / 4 to 20 mA = 0.1% 3)
Offset 0 to 20 mA = 0.03% / 4 to 20 mA = 0.16% 4)
Input protection Protection against wiring with supply voltage
Conversion procedure Successive approximation
Input filter 2nd order low pass / cut-off frequency 1 kHz
Isolation voltage between channel and bus 500 Veff
Output of the digital value during overload  
Below lower limit  
Voltage $8001
Current $0000
Above upper limit  
Voltage $7FFF
Current $7FFF
Output format  
Voltage INT $8001 - $7FFF / 1 LSB = $0008 = 2.441 mV
Current INT $0000 - $7FFF / 1 LSB = $0008 = 4.883 µA
Non-linearity  
Voltage <0.02% 5)
Current <0.02% 6)
Permitted input signal  
Voltage Max. ±15 V
Current Max. ±50 mA
Max. gain drift  
Voltage 0.01%/°C 7)
Current 0 to 20 mA = 0.009%/°C
4 to 20 mA = 0.0113%/°C 8)
Max. offset drift  
Voltage 0.002%/°C 9)
Current 0 to 20 mA = 0.004%/°C
4 to 20 mA = 0.005%/°C 10)
Digital outputs X20CM8281
Amount 2
Rated voltage 24 VDC
Switching voltage 24 VDC -15% / +20%
Rated output current 0.5 A
Total current 1.0 A
Connection type 1-line connection
Output circuit Source
Output protection Thermal cutoff for overcurrent and short circuit, integrated protection for switching inductances, reverse polarity protection
Design FET positive switching
Diagnostics status Output monitoring with 10 ms delay
Leakage current when switched off 5 µA
Residual voltage <200 mV @ rated current 0.5 A
Short circuit peak current <14 A
Switching on after overload or short circuit cutoff ca. 10 ms (depends on the module temperature)
Switching delay  
0 --> 1 <250 µs
1 --> 0 <270 µs
Switching frequency  
Resistive load Max. 100 Hz
Braking voltage when switching off inductive loads typ. 50 VDC
Isolation voltage between channel and bus 500 Veff
Analog outputs X20CM8281
Amount 1
Output ±10 V or 0 to 20 mA, using different connection terminal points
Digital converter resolution 12-bit
Conversion time 300 µs, conversion runs asynchronous to the X2X Link cycle
Power on/off behavior Internal enable relay for boot procedure and errors
Max. error at 25°C  
Voltage  
Gain 0.040% 11)
Offset 0.0225% 12)
Current  
Gain 0.05% 13)
Offset 0.125% 14)
Output protection Short circuit protection
Settling time for output changes over entire range 1 ms
Isolation voltage between channel and bus 500 Veff
Non-linearity <0.1% 15)
Output format  
Voltage INT $8001 - $7FFF / 1 LSB = $0010 = 4.882 mV
Current INT $0000 - $7FFF / 1 LSB = $0010 = 9.766 µA
Load per channel  
Voltage Max. ±10 mA, load ≥ 1 kΩ
Current Max load 400 Ω
Error caused by Load Change  
Voltage Max. TBD%, of 10 MΩ → 1 kΩ, resistive
Current Max. TBD%, of 1 Ω → 400 Ω, resistive
Max. gain drift  
Voltage 0.012%/°C 16)
Current 0.014%/°C 17)
Max. offset drift  
Voltage 0.0075%/°C 18)
Current 0.03%/°C 19)
Operating conditions X20CM8281
Mounting orientation  
Horizontal Yes
Vertical Yes
Installation at altitudes above sea level  
0 to 2000 m No derating
>2000 m Reduction of ambient temperature by 0.5°C per 100 m
EN 60529 protection IP20
Environmental conditions X20CM8281
Temperature  
Operation  
Horizontal installation 0 to 55°C
Vertical installation 0 to 50°C
Storage -25 to 70°C
Transport -25 to 70°C
Relative humidity  
Operation 5 to 95%
Storage 5 to 95%
Transport 5 to 95%
Mechanical characteristics X20CM8281
Note Order 1x X20TB12 terminal block separately
Order 1x X20BM11 bus module separately
Spacing 12.5+0.2 mm
   
1) Based on the current measurement value
2) Based on the 20 V measurement range.
3) Based on the current measurement value
4) Based on the 20 mA measurement range.
5) Based on the 20 V measurement range.
6) Based on the 20 mA measurement range.
7) Based on the current measurement value
8) Based on the current measurement value
9) Based on the 20 V measurement range.
10) Based on the 20 mA measurement range.
11) Based on the current output value
12) Based on the entire output range
13) Based on the current output value
14) Based on the entire output range
15) Based on the output range
16) Based on the current output value
17) Based on the current output value
18) Based on the entire output range
19) Based on the entire output range
X20CM8281

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