Beckhoff BK3120
Profibus bus coupler, for up to 64 bus terminals, (255 with k-bus extension), 12 mbaud, economy plus
This Beckhoff BK3120 is supplied brand new by PartLogic for machine control, process automation, industrial communication, equipment maintenance and replacement applications. It forms part of our Industrial automation > Plc controllers > Bus couplers range and is referenced internally as PartLogic SKU PL26805610555.
Before ordering, please confirm the manufacturer part number, product specifications and compatibility with your existing equipment. If you are replacing a failed, obsolete or hard-to-find part, contact PartLogic and we can help check suitability or source related components.
| Model | BK3120 |
| Bus system | PROFIBUS DP, DP V1 services |
| Interface | 1 x D-sub 9-pin socket, shielded |
| Data rate | Automatic detection up to 12 Mbaud |
| Process data | 128 byte input, 128 byte output |
| Bus Terminals | 64 (255 with K-bus extension) |
| Power supply | 24 V DC (-15%/+20%) |
| Input current | 70 mA + (total K-bus current)/4, 500 mA max |
| K‑bus current supply | 1750 mA |
| Power contacts | Max. 24 V DC / max. 10 A |
| Electrical isolation | 500 V (power contact/supply voltage/fieldbus) |
| W x H x D | 51 mm x 100 mm x 69 mm |
| Weight | Approx. 170 g |
| Material | Polycarbonate housing |
| Mounting | 35 mm DIN rail per EN 60715, with lock |
| Operating temperature | -25 to +60 °C |
| Storage temperature | -40 to +85 °C |
| Relative humidity | 95%, non-condensing |
| Protection rating | IP20 |
| Standards EMC | EN 61000-6-2 / EN 61000-6-4 |
| Vibration/Shock | EN 60068-2-6 / EN 60068-2-27 |
| Approvals/Markings | CE, CCC, UL, ATEX, IECEx, DNV, cFMus |
| ATEX/IECEx marking | II 3G Ex ec IIC T4 Gc / Ex ec IIC T4 Gc |
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