IEC 61851-23-1:2026 pdf download,Electric vehicle conductive charging system – Part 23-1: DC electric vehicle supply equipment – Automated connection device.
IEC 61851-23-1:2026 is an IEC standard that sets out requirements for DC electric vehicle supply equipment (EVSE) when it uses an automated connection device (ACD) to make a conductive connection to the vehicle. It targets systems where the charging side A can reach up to 1,000 V AC or 1,500 V DC, while side B can reach up to 1,500 V DC. The standard focuses on DC charging infrastructure that relies on specific “system B” and “system C” approaches referenced from IEC 61851-23:2023 annexes BB and CC. It defines general requirements for the control communication between the DC EVSE and the EV, helping ensure that control signaling works correctly during coupling, handshaking, and operation. For energy transfer control via digital communications, it points to ISO 15118-20:2022 and IEC 61851-24:2023. It also clarifies what is outside scope: reverse power transfer (RPT) and bidirectional power transfer (BPT) are not specified (under consideration), and EMC requirements are handled elsewhere (IEC 61851-21-2:2018). The document limits applicability to automatic couplers of category 2, described as using an electro-mechanical interface aligned with automated charging systems under IEC 63407. It explicitly excludes category 1 couplers (IEC TS 61851-27) and category 3 couplers (IEC TS 61851-26). Finally, it notes that not all maintenance safety aspects are covered, and some topics—like certain separation concepts between side A and side B and EVSE variants without current/voltage/power control—are also under consideration. In short, it standardizes how an automated coupler-enabled DC charger should connect and communicate for controlled conductive DC charging, within defined voltage ranges and a specific coupler category framework.
