Short description
I/O module 4-channel PWM motor bridge, 4 ABR incremental encoders
General information
B&R ID code 0xA177
Status indicators I/O function per channel, operating state, module status
Module run/error Yes, using LED status indicator and software
Output Yes, using LED status indicator and software
I/O power supply Yes, using software
Power consumption
Bus 0.01 W
Internal I/O 2.4 W
External I/O 50 kHz
24 VDC 3.3 W / channel
48 VDC 4.7 W / channel
60 VDC 5.4 W / channel
External I/O 10 kHz
24 VDC 2.1 W / channel
48 VDC 2.4 W / channel
60 VDC 2.6 W / channel
External I/O 5 kHz
24 VDC 2 W / channel
48 VDC 2.1 W / channel
60 VDC 2.2 W / channel
Additional power dissipation caused by actuators (resistive) [W] -
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 cURus E225616
Power conversion equipment
HazLoc cCSAus 244665
Process control equipment
for hazardous locations
Class I, Division 2, Groups ABCD, T5
KC Yes
Digital inputs
Quantity 16
Nominal voltage 24 VDC
Input characteristics per EN 61131-2 Type 1
Input voltage 24 VDC (-15% / +20%)
Input current at 24 VDC Approx. 4 mA
Input circuit Sink
Input filter
Hardware <5 µs
Software -
Connection type 1-wire connections
Input resistance Typ. 6 kΩ
Additional functions 4x ABR incremental encoder
Switching threshold
Low <5 VDC
High >15 VDC
Insulation voltage between channel and bus 500 Veff
ABR incremental encoder
Quantity 4
Encoder inputs 24 V, asymmetrical
Counter size 16-bit
Input frequency Max. 50 kHz
Evaluation 4x
Signal form Square wave pulse
PWM output
Quantity 4
Nominal voltage 24 to 48 VDC ±25%
Nominal current 6 A
Maximum current 10 A (2 s)
PWM frequency 15 Hz to 50 kHz
Actuator power supply
Supply External
Fuse Required line fuse: Max. 32 A slow-blow (see "Overcurrent protection")
Output protection Thermal shutdown in the event of overcurrent or short circuit
Variant H bridge
Configurable dither Amplitude, frequency
Period duration resolution 16-bit, min. 20 μs
Phase shift PWM1, 2, 3, 4 90° each
DC bus capacitance 680 μF
PWM pulse width
PWM mode 15 bits plus sign ≥10 ns
Current mode 15 bits plus sign ≥10 ns
Insulation voltage between channel and bus 500 Veff
Electrical properties
Electrical isolation Channel isolated from bus
Channel not isolated from channel
Operating conditions
Mounting orientation
Horizontal Yes
Installation elevation above sea level
0 to 2000 m No limitation
>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 0 to 50°C
Vertical mounting orientation Not permitted
Derating -
Storage -25 to 70°C
Transport -25 to 70°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 2x terminal block X20TB12 separately.
Order 1x terminal block 0TB3103-7020 separately.
Pitch 87.5+0.2 mm
Material number:
  • 4x outputs (H bridge) with PWM control and 24 to 48 VDC ±25% supply
  • 6 A nominal current (10 A max current)
  • 15 Hz to 50 kHz frequency, 16-bit
  • PWM resolution, 15-bit, + sign, minimum 10 ns
  • Configurable dither
  • 4x 4 inputs 24V, can be configured as ABR
  • Sink connection
  • 1-wire connections

The PWM motor bridge module is used to control 4 DC motors with a nominal voltage of 24 to 48 VDC ±25% at a nominal current up to 6 A.

Mandatory Accessories
Terminal blocks
0TB3103-7020 Accessory terminal block, 3-pin, screw clamps 6 mm²
X20TB12 X20 terminal block, 12-pin, 24 VDC keyed
Automation Studio HW Upgrades Version (Date) Download
V2.6 HW Upgrade (X20MM4456) EXE / 2 MB
V3.0 HW Upgrade (X20MM4456) EXE / 3 MB
V4.0 HW Upgrade (X20MM4456) EXE / 2 MB
Certificates Version (Date) Download
244665 CSA HazLoc Certificate of Compliance X20, X67 PDF / 149 KB
Safe cutoff of potential groups PDF / 0 B
X20, X67 KC certificates PDF / 6 MB
Documentation Version (Date) Download
Datasheet X20MM4456 PDF / 648 KB
Installation- / EMC-Guide PDF / 20 MB
X20 System User´s Manual PDF / 7 MB
E-CAD (Electro or EPLAN Templates) Version (Date) Download
X20 EPLAN P8 from V2.4 EXE / 158 MB
M-CAD (Mechan. Templates) Version (Date) Download
3D File STEP X20MM445x ZIP / 995 KB

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