B&R X20cDC2395
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.
Lifecycle & replacement
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Technical specifications
Short description
| I/O module | 1 SSI absolute encoders 24 V, 1 ABR incremental encoders 24 V, 2 AB incremental encoders 24 V, 4x event counter or 2x pulse width modulation, time measurement, relative timestamp |
General information
| Diagnostics / Module run/error | Yes, using LED status indicator and software |
| Diagnostics / Outputs | Yes, using LED status indicator and software (output state) |
| Power consumption / Bus | 0.01 W |
| Power consumption / Internal I/O | 1.4 W |
| 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 | cULus E115267 Industrial control 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 / LR | ENV1 |
| Certifications / KR | Yes |
| Certifications / ABS | Yes |
| Certifications / BV | EC33B Temperature: 5 - 55°C Vibration: 4 g EMC: Bridge and open deck |
| Input voltage | 24 VDC -15% / +20% |
| B&R ID code | 0xE503 |
| Status indicators | I/O function per channel, operating state, module status |
| Additional power dissipation caused by actuators (resistive) [W] | - |
| Type of signal lines | Shielded lines must be used for all signal lines. |
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 proof, overload-proof |
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 |
| Coding | Gray/Binary |
| CLK: Output current | Max. 100 mA |
| Overload characteristics of encoder power supply | Short-circuit proof, overload-proof |
Event counters
| Input filter / Hardware | ≤2 µs |
| Input filter / Software | - |
| Switching threshold / Low | <5 VDC |
| Switching threshold / High | >15 VDC |
| 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 |
Edge detection / Time measurement
| Counter frequency / Internal | 8 MHz, 4 MHz, 2 MHz, 1 MHz, 500 kHz, 250 kHz, 125 kHz, 62.5 kHz |
| Possible measurements | Gate time, period duration, edge offset for various channels |
| Measurements per module | Up to 9 |
| Measurements per channel | Up to 2 |
| Signal form | Square wave pulse |
| Counter size | 16-bit |
| Measurement type | Continuous or triggered |
Digital outputs
| Pulse width modulation / Period duration | 41.6 µs to 1.36 s |
| Pulse width modulation / Factor for period duration | n/48000 s, n = 2 to 65535 |
| Pulse width modulation / Pulse duration | 0 to 100% |
| Pulse width modulation / Resolution for pulse duration | 0.1% |
| Switching delay / 0 → 1 | <2 µs |
| Switching delay / 1 → 0 | <2 µs |
| Switching frequency / Resistive load | Max. 24 kHz |
| Switching frequency / Inductive load | See section "Switching inductive loads". |
| 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 shutdown in the event of overcurrent or short circuit, integrated protection for switching inductive loads |
| 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 nominal 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) |
| 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 |
| Mounting orientation / Vertical | 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 60°C |
| Temperature / Operation / Vertical mounting orientation | -25 to 50°C |
| Temperature / Derating | - |
| 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 X20cBM11 separately. |
| Pitch | 12.5⁺⁰.² mm |
Documentation & CAD
Files hosted by B&R Industrial Automation; links open the official download page.
Datasheets
Manuals
ECAD / EPLAN
Certificates
- 2226379 CSA Certificate of Compliance X20 X67
- 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
- FTZU 09 ATEX 0083X
- 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
- X20 Package leaflet ATEX/CSA
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.