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Short description
I/O module 1x EnDat interface
General information
B&R ID code 0xA912
Status indicators Counting direction, operating status, module status
Module run/error Yes, using status LED and software
Counting direction Yes, using status LED
Power consumption
Bus 0.01 W
Internal I/O 1.3 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
KC Yes
Encoder inputs
Type EnDat 2.1/2.2
Angular position resolution 13-bit, with a 1 VSS signal
Encoder monitoring Yes
Max. encoder cable length 10 m, with a line cross-section 4x 2x 0.14 mm2 and 1x 2x 0.5 mm2
Sine/Cosine inputs
Signal transmission Differential signals, symmetrical
Signal frequency DC up to 400 kHz
Differential voltage 1 VSS
Common-mode voltage Max. ±10 V
Terminating resistor 120 Ω
Encoder power supply
Output voltage 5 V (±5%)
Load capacity 300 mA
Protective measures
Overload-proof Yes
Short-circuit proof Yes
Serial EnDat interface
Signal transmission 5 VDC differential signal, EiA RS-485 standard
Transmission status See EnDat specification
Electrical properties
Electrical isolation
Channel isolated from bus

Channel not isolated from channel
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 See section "Derating"
Storage -40 to 85°C
Transport -40 to 85°C
Relative humidity
Operation 5 to 95%, non-condensing
Storage 5 to 95%, non-condensing
Transport 5 to 95%, non-condensing
Mechanical properties
Note Order 1x X20TB12 terminal block separately
Order 1x X20BM11 bus module separately
Pitch 12.5+0.2 mm
Material number:
  • EnDat 2.1 and EnDat 2.2 encoder interface
  • Encoder input monitoring
  • 5 VDC and GND for encoder supply
  • NetTime timestamp: Position time

The module is equipped with an EnDat encoder interface. The module automatically detects whether an encoder is connected with EnDat 2.1 or EnDat 2.2. This module can be used to evaluate encoders installed in B&R servo motors as well as encoders for external axes (encoders that scan any machine movement). The input signals are monitored. This makes it possible to detect open or shorted lines as well as encoder supply failures.

Mandatory Accessories
Bus modules
X20BM11 X20 bus module, 24 VDC keyed, internal I/O supply continuous
X20BM15 X20 bus module, with node number switch, 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
V2.7 HW Upgrade (X20DS1928) EXE / 3 MB
V3.0 HW Upgrade (X20DS1928) EXE / 5 MB
V4.0 HW Upgrade (X20DS1928) EXE / 3 MB
Certificates Version (Date) Download
244665 CSA HazLoc Certificate of Compliance X20, X67 PDF / 56 KB
E115267 UL CoC X20 PDF / 847 KB
FTZU 09 ATEX 0083X PDF / 697 KB
X20, X67 KC certificates PDF / 6 MB
Documentation Version (Date) Download
Datasheet X20DS1928 PDF / 1,005 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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