EMS Energy Management Controller Reference Design
An illustrative reference design for station-level energy management controllers (EMS) in the PV & ESS management and communication layer: the processor brings out 4 Ethernet ports through a Gigabit switch IC to the PCS, BMS master, monitoring SCADA and dispatch; 8 isolated RS-485 channels to meters, air conditioning, fire protection and the weather station; 4 isolated CAN channels to the battery clusters and PCS; and 4G as the remote O&M backup; powered from 24 V inside the cabinet. With high interface density, every port has a transformer / common-mode suppression and protection. Each position is marked with the VOOHU parts available, recommended part numbers and package pinouts.
Illustrative PCB ⇄ Schematic
Illustrative top-side view arranged by functional zone (not the actual layout). Red numbered dots mark positions VOOHU can supply. Click a component on the board, an entry in the index below or a part in the schematic to see recommended parts and package pinouts on the right.
Illustrative Ethernet topology: the processor connects over RGMII to the Gigabit switch IC U4 (JL6107, 5 + 2 ports); each of the 4 downstream ports passes ESD D1 (WHALD03G4U) and the VOOHU dual-port Gigabit LAN transformer T1 (WHSG48001TG, 2 ports per part) to the 1×4 RJ45 J1; cable-side center taps go to chassis ground through 75Ω×2 + 1nF/2kV. Port P0 is drawn with one pair; the other ports / pairs are identical.
Board bill of materials
Summarized by position; click any row to locate it on the board above.
| No. | Zone | Position | Ref. | VOOHU category | Recommended part | Availability |
|---|---|---|---|---|---|---|
| 01 | A Gigabit Ethernet ports ×4 | RJ45 1×4 ports (PCS / BMS / local monitoring / dispatch) | J1 | RJ45 Connector | SYT561488AB1A3DY1027 | VOOHU |
| 02 | A Gigabit Ethernet ports ×4 | Gigabit LAN transformers ×2 (dual-port) | T1 | LAN Transformers | WHSG48001TG | VOOHU |
| 03 | A Gigabit Ethernet ports ×4 | Ethernet port ESD array | D1 | TVS ESD | WHALD03G4U | VOOHU |
| 04 | A Gigabit Ethernet ports ×4 | Gigabit switch IC (5 + 2 ports) | U4 | Ethernet Switch ICs | JL6107-PI | VOOHU |
| 05 | B RS-485 ×8 (isolated) | RS-485 terminals ×8 | J2 | — | — | Non-VOOHU |
| 06 | B RS-485 ×8 (isolated) | RS-485 GDT ×8 | GDT1 | GDT | WHGT090V1P0A | VOOHU |
| 07 | B RS-485 ×8 (isolated) | RS-485 CMC ×8 | L1 | Signal Line Common Mode Chokes | WHAC-4532A-510U0 | VOOHU |
| 08 | B RS-485 ×8 (isolated) | RS-485 ESD / TVS ×8 | D2 | TVS ESD | WHALD30E2B | VOOHU |
| 09 | B RS-485 ×8 (isolated) | Isolated RS-485 transceivers ×8 | U5 | — | — | Non-VOOHU |
| 10 | B RS-485 ×8 (isolated) | Push-pull driver + rectifier / LDO | U6 | — | — | Non-VOOHU |
| 11 | B RS-485 ×8 (isolated) | Push-pull isolation transformer | T2 | Push-Pull Transformers | WHST06K02A0 | VOOHU |
| 12 | C CAN ×4 / 4G | CAN terminals ×4 | J3 | — | — | Non-VOOHU |
| 13 | C CAN ×4 / 4G | CAN CMC ×4 | L2 | Signal Line Common Mode Chokes | WHAC-3225B-510U0 | VOOHU |
| 14 | C CAN ×4 / 4G | CAN ESD / TVS ×4 | D3 | TVS ESD | WHALD30E2B | VOOHU |
| 15 | C CAN ×4 / 4G | Isolated CAN transceivers ×4 | U7 | — | — | Non-VOOHU |
| 16 | C CAN ×4 / 4G | Nano SIM card socket | J4 | SIM Card Sockets | WHNS135-T1151-01 | VOOHU |
| 17 | C CAN ×4 / 4G | SIM card ESD array | D4 | TVS ESD | WHTA5V01P2C | VOOHU |
| 18 | C CAN ×4 / 4G | 4G Cat.1 module | U8 | — | — | Non-VOOHU |
| 19 | D Processor | Processor (EMS strategy + protocols) | U1 | — | — | Non-VOOHU |
| 20 | D Processor | DDR memory | U2 | — | — | Non-VOOHU |
| 21 | D Processor | eMMC | U3 | — | — | Non-VOOHU |
| 22 | E 24 V power | 24 V in-cabinet power terminal | J5 | — | — | Non-VOOHU |
| 23 | E 24 V power | Bidirectional input TVS | D5 | TVS ESD | WHTB058VA | VOOHU |
| 24 | E 24 V power | Input power-line common-mode choke | L3 | Power Line Common Mode Chokes | WHAL-7060A-102T0 | VOOHU |
| 25 | E 24 V power | Buck converter (24 V → 5 V) | U9 | — | — | Non-VOOHU |
| 26 | E 24 V power | Buck converter (5 V → 3.3 V / core) | U10 | — | — | Non-VOOHU |
| 27 | E 24 V power | Molded inductors ×2 (DC-DC) | L4 L5 | Molded Inductors | WHYT0630 Series | VOOHU |
Resources & downloads
Board bill of materials
Reference designators, zones, VOOHU categories, recommended parts and availability for all 27 positions. Opens directly in Excel.
Datasheet collection
Datasheet PDFs for the VOOHU parts recommended on this board.
Design files & footprint library
Schematic, PCB, and VOOHU part footprints and 3D models.
Coming soonRequest the EMS energy management controller reference design full package
Includes the full-board position list, datasheets for the recommended VOOHU parts and position-by-position selection notes. For selection advice tailored to your Ethernet / 485 / CAN port count, protocol (Modbus / IEC 104 / IEC 61850) or protection level, please include it in your requirements. We reply within 24 hours on working days.
