Beckhoff BK3120 Profibus Economy Plus BUS Coupler
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PROFIBUS Bus Coupler The BECKHOFF BK3120 is a PROFIBUS Economy Plus Bus Coupler designed for reliable industrial communication, supporting up to 12 Mbaud and flexible Bus Terminal integration.
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| Number of Bus Terminals | 64 (255 with K-bus extension) |
| Max. number of bytes fieldbus | 128 byte input and 128 byte output |
| Transmission rate | automatic detection up to 12 Mbaud |
| Bus interface | 1 x D-sub 9-pin socket with shielding |
| Transmission medium | shielded copper cable, 2 x 0.25 mm² |
| Power supply | 24 V DC (-15%/+20%) |
| Input current | 70 mA + (total K-bus current)/4, 500 mA max. |
| Current supply K-bus | 1750 mA |
| Power contacts | max. 24 V DC/max. 10 A |
| Electrical isolation | 500 V (power contact/supply voltage/fieldbus) |
| Operating temperature | -25…+60°C |
| Relative humidity | 95%, no condensation |
| Vibration/shock resistance | conforms to EN 60068-2-6/EN 60068-2-27 |
| EMC immunity/emission | conforms to EN 61000-6-2/EN 61000-6-4 |
| Protect. rating/installation pos. | IP20/variable |
| Approvals/markings | CE, CCC, UL, ATEX, IECEx, DNV, cFMus |
| Ex marking ATEX | II 3G Ex ec IIC T4 Gc/IECEx:Ex ec IIC T4 Gc |
| cFMus | Class I, Division 2, Groups A, B, C, D/Class I, Zone 2, AEx ec IIC T4 Gc |
| Design form | compact terminal housing with signal LEDs |
| Material | polycarbonate |
| Installation | on 35 mm DIN rail, conforming to EN 60715 with lock |
| Side by side mounting by means of | double slot and key connection |
| Marking | labeling of the BZxxxx series |
| Dimensions (W x H x D) | 51 mm x 100 mm x 69 mm |
| Stock key | CON-003 |
| Condition | New |
| SKU | 1100794 |
| Weight | 0,20 |





















