B&R X20DC137A
1 ABR incremental encoder 24 V, differential Encoder input monitoring 2 additional inputs, e.g. for latch input 24 VDC and GND for encoder supply NetTime timestamp: Counter change The module is equipped with 1 input for an ABR incremental encoder with 24 V encoder supply. The encoder inputs are monitored (A, B, R, A\, B\, R\). The module is suitable for incremental encoders with symmetrical push-pull outputs. The plug-in module does not come equipped with line terminating resistors. For this reason, it is possible to connect encoders with low output current; nevertheless, the module is suitable only for low counter frequencies or short encoder cables due to possible line reflections.
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 | 1 ABR incremental encoder 24 V |
General information
| Diagnostics / Module run/error | Yes, using LED status indicator and software |
| Power consumption / Bus | 0.01 W |
| Power consumption / Internal I/O | 1.2 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 / 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 | 0xDD28 |
| 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. |
Digital inputs
| Input filter / Hardware | ≤2 µs |
| Input filter / Software | - |
| Switching threshold / Low | <5 VDC |
| Switching threshold / High | >15 VDC |
| Quantity | 2 |
| Nominal voltage | 24 VDC |
| Input characteristics per EN 61131-2 | Type 1 |
| Input voltage | 24 VDC -15% / +20% |
| Input current at 24 VDC | Approx. 3.3 mA |
| Input circuit | Sink |
| Connection type | 3-wire connections |
| Input resistance | 7.03 kΩ |
| Additional functions | Latch input |
| Insulation voltage between channel and bus | 500 Veff |
ABR incremental encoder
| Input filter / Hardware | ≤0.5 µs |
| Input filter / Software | - |
| Switching threshold / Low | >5 V |
| Encoder inputs | 24 V, symmetrical |
| Counter size | 16/32-bit |
| Input frequency | Max. 300 kHz |
| Evaluation | 4x |
| Minimum diff. slew rate | 1 V/μs |
| Encoder power supply | Module-internal, max. 600 mA |
| Common-mode range | -10 V ≤ VCM ≤ +13 V |
| Overload characteristics of encoder power supply | Short-circuit proof, overload-proof |
| Insulation voltage between encoder and bus | 500 Veff |
Electrical properties
| Electrical isolation | Channel isolated from bus Channel not isolated from channel |
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 | See section "Derating". |
| Temperature / Storage | -40 to 85°C |
| Temperature / Transport | -40 to 85°C |
| Relative humidity / Operation | 5 to 95%, non-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 X20BM11 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
- 64331_A1 BV Certificate of Compliance X20
- 64331_A1 BV Certificate of Compliance X20(de)
- ABS Certificate of Product Design Assessment - X20 IO Series
- CCS Type Approval Certificate - X20
- E115267 UL Certificate of Compliance X20
- 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)
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.