3根線電子積木接口，輸入5V - GND。S腳為輸出模擬電壓值。可以使用跳線選擇輸出的並聯電阻來調整輸出的模擬值範圍。具體參見產品手冊。--互感器只能感應交流電
Electrical characteristics
| Parameter | Min. | Typical | Max. | Unit |
| Transformation coefficient | - | 1000:1 | - | - |
| Input current | 0 | - | 5 | A |
| Output current | 0 | - | 5 | mA |
| Sampling resistor | - | 200 | - | Ω |
| Sampling voltage | 0 | - | 1 | V |
| Working frequency | 20 | - | 20000 | Hz |
| Working temperature | -55 | - | 85 | ℃ |
| Dielectric strength | - | 6 | - | KAC/1min
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