This document introduces the features and characteristics of the BLF-S7B series current sensors, which can be used to measure DC, AC, and pulse currents. The sensors have high insulation performance, use Hall effect, are easy to install, and have small size and light weight. They are suitable for applications such as variable frequency speed control systems, welding machines, communication power supplies, uninterruptible power supplies UPS, choppers, and electrochemistry.
This manual describes the LEM BLF‑S7B series current sensors, covering their electrical characteristics, accuracy, and environmental limits. It includes data for the various models (BLF50‑S7B, BLF200‑S7B, etc.) and explains how to install and connect the sensor.
The document lists key parameters such as rated primary current, secondary current, output voltage, power consumption, temperature range, weight, and mechanical dimensions. Installation details include mounting hole spacing and recommended wiring connections. This manual is written in Chinese.
| Output voltage | ±15 V, 0 V |
|---|---|
| Power consumption | 15 mA |
| Operating temperature range | -10 °C to +80 °C |
| Storage temperature range | -25 °C to +85 °C |
| Load resistance | 10 kΩ |
| Weight | ≈120 g |
| Frequency response | 50 Hz‑3 kHz |
| Mounting hole spacing | 20 mm |
The sensor draws about 15 mA of current.
It operates between –10 °C and +80 °C.
The sensor outputs +15 V, –15 V, and 0 V signals.