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Short description
I/O module 1 SSI absolute encoder, 24 V, 1 ABR incremental encoder, 24 V, 2 AB incremental encoders, 24 V, 4x event counters or 2x pulse width modulation, time measurement, relative timestamp
General information
Input voltage 24 VDC -15 % / +20 %
B&R ID code 0xE503
Status indicators I/O function per channel, operating state, module status
Module run/error Yes, using status LED and software
Outputs Yes, using the status LED and software (output error status)
Power consumption
Bus 0.01 W
Internal I/O 1.4 W
Additional power dissipation caused by actuators (resistive) [W] -
Type of signal lines Shielded cables must be used for all signal lines
CE Yes
ATEX Zone 2, II 3G Ex nA nC IIA T5 Gc
IP20, Ta (see X20 user's manual)
FTZÚ 09 ATEX 0083X
UL cULus E115267
Industrial control equipment
HazLoc cCSAus 244665
Process control equipment
for hazardous locations
Class I, Division 2, Groups ABCD, T5
DNV GL Temperature: B (0 - 55°C)
Humidity: B (up to 100%)
Vibration: B (4 g)
EMC: B (bridge and open deck)
KR Yes
Incremental encoders
Quantity 2
Encoder inputs 24 V, asymmetrical
Counter size 16/32-bit
Input frequency Max. 100 kHz
Evaluation 4x
Encoder power supply Module-internal, max. 600 mA
Overload characteristics of encoder power supply Short circuit protection, overload protection
SSI absolute encoder
Quantity 1
Encoder inputs 24 V, asymmetrical
Counter size 32-bit
Max. transfer rate 125 kbit/s
Encoder power supply Module-internal, max. 600 mA
Keying Gray/Binary
CLK: Output current Max. 100 mA
Overload characteristics of encoder power supply Short circuit protection, overload protection
Event counters
Quantity 4
Nominal voltage 24 VDC
Signal form Square wave pulse
Evaluation Each edge, cyclic counter
Input frequency Max. 100 kHz
Input current at 24 VDC Approx. 1.3 mA
Input resistance 18.4 kΩ
Insulation voltage between channel and bus 500 Veff
Counter frequency 200 kHz
Counter size 16/32-bit
Input filter
Hardware ≤2 µs
Software -
Switching threshold
Low <5 VDC
High >15 VDC
Edge detection / Time measurement
Possible measurements Gate time, period duration, edge offset for various channels
Measurements per module Up to 9
Measurements per channel Up to 2
Counter size 16-bit
Counter frequency
Internal 8 MHz, 4 MHz, 2 MHz, 1 MHz, 500 kHz, 250 kHz, 125 kHz, 62.5 kHz
Signal form Square wave pulse
Measurement type Continuous or triggered
Digital outputs
Quantity 2
Variant Push / Pull / Push-Pull
Nominal voltage 24 VDC
Switching voltage 24 VDC -15 % / +20 %
Nominal output current 0.1 A
Total nominal current 0.2 A
Output circuit Sink or source
Output protection Thermal cutoff if overcurrent or short circuit occurs, integrated protection for switching inductances
Pulse width modulation
Period duration 41.6 µs to 1.36 s
Factor for period duration n/48000 s, n = 2 to 65535
Pulse duration 0 to 100 %
Resolution for pulse duration 0.1%
Actuator power supply Module-internal, max. 600 mA
Diagnostic status Output monitoring
Leakage current when the output is switched off Max. 25 µA
Residual voltage <0.9 V at 0.1 A rated current
Peak short-circuit current <10 A
Switch-on in the event of overload shutdown or short-circuit shutdown Approx. 10 ms (depends on the module temperature)
Switching delay
0 → 1 <2 µs
1 → 0 <2 µs
Switching frequency
Resistive load Max. 24 kHz
Inductive load See section "Switching inductive loads"
Braking voltage when switching off inductive loads Switching voltage + 0.6 VDC
Insulation voltage between channel and bus 500 Veff
Electrical properties
Electrical isolation
Bus isolated from encoder and output

Output not isolated from output and encoder

Encoder not isolated from encoder
Operating conditions
Mounting orientation
Horizontal Yes
Vertical Yes
Installation elevation above sea level
0 to 2000 m No limitations
>2000 m Reduction of ambient temperature by 0.5°C per 100 m
Degree of protection per EN 60529 IP20
Ambient conditions
Horizontal mounting orientation -25 to 60°C
Vertical mounting orientation -25 to 50°C
Derating -
Storage -40 to 85°C
Transport -40 to 85°C
Relative humidity
Operation Up to 100%, condensing
Storage 5 to 95%, non-condensing
Transport 5 to 95%, non-condensing
Mechanical properties
Note Order 1x X20TB12 terminal block separately
Order 1x X20cBM11 bus module separately
Pitch 12.5+0.2 mm
Material number:
  • 24 VDC encoder inputs
  • SSI, ABR, AB or event counters for inputs
  • Pulse width modulation for outputs
  • 24 VDC and GND for encoder supply

This module is a multifunctional counter module. It can be connected to one SSI encoder, one ABR encoder, two AB encoders or four event counters. Two outputs are available for pulse width modulation. The functions can also be mixed.

Mandatory Accessories
Bus modules
X20cBM11 X20 bus module, coated, 24 VDC keyed, internal I/O supply continuous
Terminal blocks
X20TB12 X20 terminal block, 12-pin, 24 VDC keyed
Automation Studio HW Upgrades Version (Date) Download
V3.0 HW Upgrade (X20cDC2395) EXE / 2 MB
V4.0 HW Upgrade (X20cDC2395) EXE / 1 MB
Certificates Version (Date) Download
244665 CSA HazLoc Certificate of Compliance X20, X67 PDF / 56 KB
ABS Certificate of Product Design Assessment - X20 IO Series PDF / 2 MB
DNV GL Type Approval Certificate - X20 / Power Panel T30 PDF / 164 KB
FTZU 09 ATEX 0083X PDF / 697 KB
KR Type Approval Certificate MIL39390-AC003 (X20 System) PDF / 758 KB
Lloyds Register PDF / 506 KB
Documentation Version (Date) Download
Coated modules PDF / 60 KB
Data sheet X20(c)DC2395 PDF / 523 KB
X20 System User´s Manual PDF / 56 MB
E-CAD (Electro or EPLAN Templates) Version (Date) Download
X20 EPLAN P8 from V2.4 EXE / 161 MB
M-CAD (Mechan. Templates) Version (Date) Download
3D File DXF/STEP X20 Electronic module ZIP / 10 KB
3D File STEP X20 I/O-Slice ZIP / 872 KB
Dimensions PDF X20 Electronic module PDF / 3 KB

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