Dual-Display Fiber-Type Hot Metal Detection Sensor
| Item | Spec. |
|---|---|
| Product type | Fiber-type hot metal detection sensor (HMD) |
| Detection method | Infrared energy radiated from hot material |
| Current models | FD-A320 FD-A320H |
| Power supply | 100–240VAC, +10%/-15%, 50/60Hz |
| Power consumption | 6W max. |
| Detecting object temperature | 350°C or higher |
| Detecting distance | 0.50 m |
| Detecting object diameter | Φ28 mm |
| Low-temperature range | 350–800°C |
| High-temperature range | 490–1300°C |
| Temperature range selection | Low/high ranges selectable by internal switch |
| Operating threshold display | Green LED, 2-digit numerical display |
| Operating threshold setting range | 1.0–9.0, 0.1 steps |
| Operation mode | Light-ON |
| STB function | Provided |
| Optical head / fiber ambient temperature | −25 to +200°C |
| Amplifier ambient temperature | −25 to +50°C, non-freezing |
| Ambient humidity | 35–85% RH, non-condensing |
| Fiber allowable bending radius | 50 mm |
| Protective structure | IP64 |
Specification notes
Q1: What is the FD-A320 Series?
A: The FD-A320 Series is a fiber-type hot metal detection sensor that detects infrared energy radiated from heated steel and other hot materials without requiring a separate light emitter.
Q2: Which models are available in the FD-A320 Series?
A: The current lineup consists of FD-A320 and FD-A320H. Their main differences are relay output type and response time.
Q3: What hot-material temperatures can the FD-A320 Series detect?
A: With an OHA optical head and FG2 2 m fiber, and when the target is larger than the detection field, the low-temperature range is 350–800°C and the high-temperature range is 490–1300°C.
Q4: What information is shown on the FD-A320 dual display?
A: The displays simultaneously show received light intensity and the output operating threshold, allowing the current detection condition to be compared directly with the set value.
Q5: What is the difference between FD-A320 and FD-A320H?
A: FD-A320 uses a mini power relay with PhotoMOS output, while FD-A320H uses a Bestact relay with PhotoMOS output. Their relay ratings and response times also differ.
Q6: Does the FD-A320 Series provide a 4–20 mA analog output?
A: Yes. Received light intensity can be output as a 4–20 mA analog current signal with an allowable load resistance of 0–500 Ω.
Q7: How are the low- and high-temperature ranges selected?
A: Two temperature ranges are built into the sensor and can be selected using an internal switch.
Q8: What is the FD-A320 simulation function used for?
A: An external input can force a simulated hot-material detection and generate the same output operation as actual detection, allowing control circuits and equipment operation to be checked.
Q9: What are the protection rating and operating temperatures of the FD-A320 Series?
A: The protective structure is IP64. The optical head and fiber operate from -25 to +200°C, while the amplifier operates from -25 to +50°C.
Q10: What applications is the FD-A320 Series suitable for?
A: It is suitable for presence, passage, and position detection of heated steel and other hot materials, including red-hot steel at furnace outlets, with dual displays and 4–20 mA output available for received-light monitoring.