B&R 7EC021.61-2
RS232 interface (IF1) for programming and configuring using B&R Automation Studio CAN interface (IF2) for connecting to a CAN network Profibus DP interface (IF3) for connecting to a Profibus network X2X Link interface (IF4) Ethernet interface (IF6) for connecting to an Ethernet network ARNCO (only on 7EC021.61-2) In addition, a maximum of three digital inputs / outputs are provided. The digital inputs and outputs can be configured individually as input or output. Additional functions such as a counter function with direction switching (stepper motor) or period and gate measurement are integrated. Embedded controller, ARNC0, x86 100 MHz Intel compatible, 32 MB DRAM, 32 kB SRAM, exchangeable application memory: CompactFlash, 1 CAN interface, 1 Profibus DP slave interface, 1 X2X Link master interface, 1 Ethernet interface 100 Base-T, 1 RS232 interface, 3 digital mixed channels can be configured as inputs or outputs, 24 VDC, 0.5 A, order program memory separately. Order 0TB708 and 0TB704 terminal blocks separately.
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
General information
| Module type | Embedded controller |
| Power consumption | <6 W |
Controller
| Operating system | AC140 (Version E2.82 or higher) |
| Processor clock | 100 MHz |
| DRAM | 32 MB |
| SRAM | 32 kB |
Inputs/Outputs
| Module-side connection | 8-pin connector |
| Configuration of digital inputs/outputs | Can be configured individually as input or output |
Interfaces
| Interface IF1 / Type | RS232 |
| Interface IF1 / Variant | 9-pin DSUB plug |
| Interface IF1 / Status indicators | 232 LED |
| Interface IF1 / Max. transfer rate | 115.2 kbit/s to 19200 kbit/s at 15 m |
| Interface IF2 / Type | CAN electrically isolated |
| Interface IF2 / Variant | 9-pin DSUB plug |
| Interface IF2 / Status indicators | CAN LED |
| Interface IF2 / Max. transfer rate | 50 kbit/s at 1000 m to 500 kbit/s at 60m |
| Interface IF2 / Network-capable | Yes |
| Interface IF2 / Bus terminating resistor | Externally wired |
| Interface IF3 / Type | RS485 electrically isolated |
| Interface IF3 / Variant | 9-pin DSUB socket |
| Interface IF3 / Status indicators | PB LED |
| Interface IF3 / Max. transfer rate | 187.5 kbit/s at 1000 m to 12 Mbit/s at 100 m |
| Interface IF3 / Network-capable | Yes |
| Interface IF3 / Bus terminating resistor | External T-connector |
| Interface IF3 / Transfer protocol | PROFIBUS DP |
| Interface IF4 / Type | X2X Link master electrically isolated |
| Interface IF4 / Variant | 4-pin connector |
| Interface IF4 / Status indicators | X2X LED |
| Interface IF4 / Max. distance | 100 m |
| Interface IF4 / Network-capable | Yes, network topology: Line |
| Interface IF6 / Type | IEEE 802.3 Ethernet |
| Interface IF6 / Variant | RJ45 socket |
| Interface IF6 / Status indicators | ACT LED |
| Interface IF6 / Max. distance | 100 m |
| Interface IF6 / Transfer rate | 10/100 Mbit/s |
Incremental encoders
| Counter size | 16-bit |
| Input frequency | Max. 20 kHz |
| Evaluation | 4x |
| Signal form | Square wave pulse |
| Inputs | A/B on input 1/2 reference pulse on input 3 |
Digital inputs
| Quantity | Max. 3 |
| Input voltage | 24 VDC |
| Circuit | Sink |
| Input delay | <5 µs |
| Electrical isolation | Input - PLC |
Event counters
| Signal form | Square wave pulse |
| Input frequency | Max. 100 kHz |
| Inputs | Counter on input 1 |
| Pulse length | Min. 5 µs |
| Counter size | 32-bit |
Gate time measurement
| Signal form | Square wave pulse |
| Counter frequency | 31.25 kHz/4 MHz internal, max. 100 kHz external |
| Input frequency | Max. 100 kHz |
Period measurement
| Signal form | Square wave pulse |
| Input frequency | Max. 100 kHz |
| Counter frequency | 31.25 kHz/4 MHz internal, max. 100 kHz external |
Digital outputs
| Electrical isolation / Input - PLC | Yes |
| Nominal voltage | 24 VDC |
| Output protection | Cutoff for overcurrent or short circuit |
| Nominal current | 500 mA |
| Switching frequency (resistive load) | Max. 100 Hz |
| Switching delay | Typ. 250 μs |
| Interface type | Max. 3 |
| Type | High-side transistor outputs, readable |
Operating conditions
| Degree of protection per EN 60529 | IP20 |
Ambient conditions
| Temperature / Operation | 0 to 45°C |
| Temperature / Storage | -25 to 55°C |
| Relative humidity / Operation | 5 to 95% |
Mechanical properties
| Dimensions / Width | 43 mm |
| Dimensions / Height | 122 mm |
| Dimensions / Depth | 110 mm |
| Note | Backup battery included in delivery |
Documentation & CAD
Files hosted by B&R Industrial Automation; links open the official download page.
Manuals
3D CAD models
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.