B&R X20cDO8331
8 digital outputs with 2 A Sink connection 1-wire connections Power feed integrated in the module Integrated output protection This module is equipped with 8 outputs for 1-wire connections. The outputs are designed for a sink circuit. The nominal output current is 2 A. The output supply is fed directly to the module. An additional supply module is not needed. There is no connection between the module and the I/O supply potential on the bus module.
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 | 8 digital outputs 24 VDC for 1-wire connections |
General information
| Diagnostics / Module run/error | Yes, using LED status indicator and software |
| Diagnostics / Outputs | Yes, using LED status indicator and software (output error status) |
| Diagnostics / Supply voltage monitoring | Yes, using software |
| Power consumption / Bus | 0.22 W |
| Power consumption / Internal I/O | - |
| Power consumption / External I/O | 0.9 W |
| Certifications / CE | Yes |
| Certifications / UKCA | Yes |
| 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 |
| B&R ID code | 0xE22B |
| Status indicators | I/O function per channel, operating state, module status |
| Additional power dissipation caused by actuators (resistive) [W] | +0.56 |
Digital outputs
| Actuator power supply / Supply | External |
| Actuator power supply / Fuse | Required line fuse: Max. 10 A, slow-blow |
| Switching delay / 0 → 1 | <300 µs |
| Switching delay / 1 → 0 | <500 µs |
| Switching frequency / Resistive load | Max. 500 Hz |
| Switching frequency / Inductive load | See section "Switching inductive loads". |
| Variant | FET current-sinking |
| Nominal voltage | 24 VDC |
| Switching voltage | 24 VDC -15% / +20% |
| Nominal output current | 2 A |
| Total nominal current | 8 A |
| Connection type | 1-wire connections |
| Output circuit | Sink |
| Output protection | Thermal shutdown in the event of overcurrent or short circuit (see value "Short-circuit peak current") Internal freewheeling diode for switching inductive loads (see section "Switching inductive loads") Reverse polarity protection of supply voltage |
| Diagnostic status | Output monitoring with 10 ms delay |
| Leakage current when the output is switched off | 75 µA |
| RDS(on) | 35 mΩ |
| Peak short-circuit current | <24 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 | Typ. 50 VDC |
| Insulation voltage between channel and bus | 500 Veff |
| Additional functions | Outputs can be connected in parallel to increase the output current. |
Electrical properties
| Electrical isolation | Channel isolated from bus Channel not isolated from channel and I/O power supply |
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 | 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.
Manuals
ECAD / EPLAN
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.