Procurement teams shortlist BK3120 with Beckhoff Bk9100, Beckhoff Bk5200 and Beckhoff Bk9105, aligning budget approvals, warranty terms, and multisite availability for smoother rollout across plants.
BK3120 - Beckhoff EtherCAT Bus Couplers
BK3120 Beckhoff EtherCAT Bus Couplers Technical Specifications
| Brand | Beckhoff |
| Product Type | EtherCAT Bus Couplers |
| Product | BK3120 |
BK3120 Beckhoff EtherCAT Bus Couplers Technical Specifications
| Specification | Value |
|---|---|
| Number of Bus Terminals | 64 (255 with K-bus extension) |
| Max. number of bytes fieldbus | 128 byte input and 128 byte output |
| Data transfer rates | automatic detection up to 12 Mbaud |
| Bus interface | 1 x D-sub 9-pin socket with shielding |
| Data transfer 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, 500Â mA max. |
| Recommended fuse | ≤ 10 A |
| Current supply K-bus | 1750 mA |
| Power contacts | max. 24 V DC/max. 10 A |
| Electrical isolation | 500 V (power contact/supply voltage/fieldbus) |
| Weight | approx. 170 g |
| Operating temperature | -25...+60°C |
| Storage temperature | -40...+85°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 GL, cFMus |
| Ex marking | ATEX:Â Â II 3G Ex ec IIC T4 GcIECEx:Â Â Ex ec IIC T4 GccFMus:Â Â Class I, Division 2, Groups A, B, C, DÂ Â Class I, Zone 2, AEx ec IIC T4 Gc |
| Housing - Design form | compact terminal housing with signal LEDs |
| Housing - Material | polycarbonate |
| Housing - Dimensions (W x H x D) | 51 mm x 100 mm x 69 mm |
| Housing - Installation | on 35 mm DIN rail, conforming to EN 60715 with lock |
| Housing - Side by side mounting by means of | double slot and key connection |
| Housing - Marking | labeling of the BZxxxx series |
| Housing - Wiring | solid conductor (s), flexible conductor (st) and ferrule (f): spring actuation by screwdriver |
| Housing - Connection cross-section | s*: 0.08...2.5 mm²,st*: 0.08...2.5 mm²,f*: 0.14...1.5 mm² |
| Housing - Stripping length | 8...9 mm |
| Housing - Current load power contacts | Imax: 10 A |
