B&R X20cMM2436
2x outputs (H bridge) with PWM control and 24 to 39 VDC ±25% supply 3 A nominal current (3.5 A max current) 15 Hz to 50 kHz frequency, 16-bit Frequency mode with 10 to 6553.5 Hz or 1 to 655.35 Hz resolution. PWM resolution, 15-bit + sign, minimum 10 ns Configurable dither 2x 2 inputs 24V, can be configured as AB Sink connection 1-wire connections The motor bridge module is used to control 2 DC motors with a nominal voltage of 24 to 39 VDC ±25% at a nominal current up to 3 A. The module can be reconfigured and used in current controller mode for controlling inductive loads. The module is also equipped with 4 digital inputs, which can be used as incremental counters. Each motor is controlled with a full-bridge (H-bridge). This enables the motors to be moved in both directions.
Lifecycle & replacement
No manufacturer-published lifecycle data for B&R part numbers is indexed here yet. Ask IAC to check availability and an upgrade path.
IAC stocks legacy spares and exchange units and quotes upgrade paths. Send us the nameplate details and we will confirm a compatible replacement.
Technical specifications
Short description
| I/O module | 2-channel PWM motor bridge, 2 AB incremental encoders |
General information
| Diagnostics / Module run/error | Yes, using LED status indicator and software |
| Diagnostics / Output | Yes, using LED status indicator and software |
| Diagnostics / I/O power supply | Yes, using software |
| Power consumption / External I/O / 24 VDC | 2.45 W |
| Power consumption / External I/O / 48 VDC | 3.15 W |
| Power consumption / Bus | 0.01 W |
| Power consumption / Internal I/O | - |
| Certifications / CE | Yes |
| Certifications / UKCA | Yes |
| Certifications / CRA (Cyber Resilience Act) | In preparation |
| Certifications / ATEX | Zone 2, II 3G Ex nA nC IIA T5 Gc IP20, Ta (see X20 user's manual) FTZÚ 09 ATEX 0083X |
| Certifications / UL | cURus E225616 Power conversion equipment |
| Certifications / HazLoc | cCSAus 244665 Process control equipment for hazardous locations Class I, Division 2, Groups ABCD, T5 |
| Certifications / DNV | Temperature: B (0 to 55°C) Humidity: B (up to 100%) Vibration: B (4 g) EMC: B (bridge and open deck) |
| Certifications / CCS | Yes |
| Certifications / LR | ENV1 |
| Certifications / KR | Yes |
| Certifications / ABS | Yes |
| Certifications / BV | EC33B Temperature: 5 - 55°C Vibration: 4 g EMC: Bridge and open deck |
| B&R ID code | 0xE752 |
| Status indicators | I/O function per channel, operating state, module status |
| Additional power dissipation caused by actuators (resistive) [W] | - |
Digital inputs
| Input filter / Hardware | <5 µs |
| Input filter / Software | - |
| Switching threshold / Low | <5 VDC |
| Switching threshold / High | >15 VDC |
| Quantity | 4 |
| Nominal voltage | 24 VDC |
| Input voltage | 24 VDC (-15% / +20%) |
| Input current at 24 VDC | Approx. 1.3 mA |
| Input circuit | Sink |
| Connection type | 1-wire connections |
| Input resistance | Typ. 18 kΩ |
| Additional functions | 2x AB incremental encoder, 1x ABR counter, 2x event counter, 2x period duration/gate measurement |
| Insulation voltage between channel and bus | 500 Veff |
AB incremental encoder
| Quantity | 2 |
| Encoder inputs | 24 V, asymmetrical |
| Counter size | 16-bit |
| Input frequency | Max. 50 kHz |
| Evaluation | 4x |
| Signal form | Square wave pulse |
PWM output
| Actuator power supply / Supply | External |
| Actuator power supply / Fuse | Required line fuse: Max. 10 A, slow-blow |
| Quantity | 2 |
| Nominal voltage | 24 to 39 VDC ±25% |
| Nominal current | 3 A |
| Maximum current | 3.5 A (2 s) |
| PWM frequency | Standard operating mode: 15 Hz to 50 kHz Frequency operating mode: 1 Hz to 6553.5 Hz SuperVibe operating mode: 1 Hz to 50 kHz |
| Output protection | Thermal shutdown in the event of overcurrent or short circuit |
| Variant | H bridge |
| Configurable dither | Amplitude, frequency |
| Period duration resolution (PWM/current operating mode) | 16-bit, min. 20 μs |
| Frequency resolution | Frequency mode Scaling 0.1 Hz <3000 Hz: 0.1 Hz; 3000 to 6553.5 Hz: 0.1 to 0.4 Hz Scaling 0.01 Hz <300 Hz: 0.01 Hz; 300 to 655.35 Hz: 0.01 to 0.04 Hz SuperVibe mode Scaling 1 Hz <10 kHz: 1 Hz; 10 to 50 kHz: 1 to 40 Hz Scaling 0.1 Hz <1000 Hz: 0.1 Hz; 1000 to 6553.5 Hz: 0.1 to 4 Hz |
| Phase shift PWM1 to PWM2 | 180° - if possible (according to operating mode) |
| DC bus capacitance | 100 μF |
| PWM pulse width | 15 bits plus sign ≥10 ns |
| Frequency 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 |
| Installation elevation above sea level / >2000 m | Reduction of ambient temperature by 0.5°C per 100 m |
| Degree of protection per EN 60529 | IP20 |
Ambient conditions
| Temperature / Operation / Horizontal mounting orientation | -25 to 50°C |
| Temperature / Operation / Vertical mounting orientation | Not permitted |
| Temperature / Derating | See section "Derating". |
| Temperature / Starting temperature | Yes, -40°C |
| Temperature / Storage | -40 to 85°C |
| Temperature / Transport | -40 to 85°C |
| Relative humidity / Operation | Up to 100%, condensing |
| Relative humidity / Storage | 5 to 95%, non-condensing |
| Relative humidity / Transport | 5 to 95%, non-condensing |
Mechanical properties
| Note | Order 1x terminal block X20TB12 separately. Order 1x bus module X20cBM31 separately. |
| Pitch | 25⁺⁰.² mm |
Documentation & CAD
Files hosted by B&R Industrial Automation; links open the official download page.
Datasheets
Manuals
3D CAD models
ECAD / EPLAN
Certificates
- ABS Certificate of Product Design Assessment - X20 IO Series
- EU Data Act - X20 IO - Connected Product Information Notice
- EU Declaration ATEX X20
- EU Declaration of conformity PLC X20
- KR Type Approval Certificate MIL39390-AC003 (X20 System)
- Lloyds Register (X20 only)
- RINA Type Approval Certificate - X20 / Power Panel T30
- TAA00000BJ DNV Type Approval Certificate X20
- UK Declaration PLC X20
Get a quote for a replacement
Industrial Automation Co. stocks, sources, and repairs B&R parts — new, refurbished, or exchange units with warranty.
Specifications from the official B&R product catalog. Always confirm against the datasheet for your exact revision.