Magneto-electric rotation detector
MP-981/AP-981
Non-contact gear detection type
MP-981
AP-981 (Water Proof Type)
The MP-981 is a magneto-type detector using an internal magneto resistive element,
a permanent magnet, DC amplifier, and voltage regulator and responding to flux (i.e., the resistance value changes in response to flux changes),
so that a rectangle waveform is output from ultra low speed to high speed (1 to 20,000 r/min (60 P/R)).
There are 3 types of detectors:
- General type：MP-981
- High speed type：MP-9820
- Water & acid proof type：AP-981
As for the MP-981, the signal cable, extension cable, and connectors are sold separately.
As for the AP-981, the signal cable is directly output cable of 1.9 m length.
Features
- Detectable from ultra low speed (almost 0 r/min)
- Safe detection as non-contact detection
- Compact, lightweight and easy to install
- Compact, lightweight and easy to install Water & acid proof (AP-981)
Detection gears
Specification of gears
| Shape of gear | Involute gear or equivalent |
|---|---|
| Module | 0.5 to 3 (MP-981), 1 to 3 (AP-981) |
| Tooth width | 3 mm or more |
| Material | Strong magnetic properties (e.g., S45C, SS400 etc.) |
Relationship between detection distance and gear modules
The detection distance depends on the modules of detective gear, with longer distances being possible with larger modules. Also detection distance depends on temperature. In cases where the ambient temperature varies greatly, it should be mounted with minimum of detection distance. The detectable range shown in the right figure assumes an output waveform duty cycle of 50 % ±20 %.
Application examples (MP-981)
Precautions of installation
Rotation Detectors Classification table
MP series Rotation Detector Classification table
（PDF 2.3 MB）
Specifications
| MP-981 | AP-981 | |
|---|---|---|
| Detection method | Magneto resistive element and electromagnetic property gear | Magneto resistive element and electromagnetic property gear |
| Detective gear | Strong magnetic properties (e.g., S45C, SS400 etc.), | Strong magnetic properties (e.g., S45C, SS400 etc.), |
| Module 0.5 to 3，teeth width 3 mm or more | Module 1 to 3, teeth width 3 mm or more | |
| Detection distance | Depends on gear module | |
| Measurement range | 1 Hz to 20 kHz (using a 60 P/R of detection gear) | |
| Output waveform | Rectangular waveform Hi level:+5 ± 0.5 V or less, Lo level:+ 0.5 V or less | |
| Output impedance | Approx. 330 Ω | |
| Applicable tachometers | TM-4000 series, TM-3100 series, TM-5100, etc. | |
| Power requirement | VDC 12±2, approx. 40 mA | |
| Protection circuit | Power supply polarity protection | |
| Operating temperature range | -10 °C to +70 °C | −10 ℃ to ＋70 ℃ |
| −10 ℃ to ＋50 ℃ （with a nitric acid mist concentration of 10%） |
||
| Withstand voltage | DC 250 V | |
| Maximum vibration (powered on) |
49 m/s2 in X, Y and Z for each direction | 1.2 mm double-sided amplitude at 30 Hzin X, Y and Z directions for one hour each |
| Maximum shock (unpowered) |
490 m/s2 in X, Y and Z direction three times each | 490 m/s2 in X,Y and Z directions three times each |
| Weight | Approx. 80 g (including mounting nuts) | Approx. 130 g （including signal cable） |
| Signal cable | Sold separately (30 m or less, MX-7000 / 8000 series connection cables in used) | Nitric acid resistant cable 1.9 m, direct output |
| Remarks | ---- | Outer surface material : PolycarbonateWaterproof type, conforming to protection class IPX7 according to JIS C0920Acid-resistant type, can be used in nitric acid mist atmosphere |
Connection signal cables (MP-981/MP-9820)
|
For TM-3100/4100 seires MX-7105 (one side crimp terminal) 5m MX-7110 (one side crimp terminal) 10m MX-7115 (one side crimp terminal) 15m MX-7120 (one side crimp terminal) 20m |
For CT-6700, TS-2800/3200A MX-8105 (both ends connectorsl) 5m MX-8110 (both ends connectorsl) 10m MX-8115 (both ends connectorsl) 15m MX-8120 (both ends connectorsl) 20m |
|
For TM-4200/4300/4400 series MX-7305 (one side ferrule terminal) 5m MX-7310 (one side ferrule terminal) 10m MX-7320 (one side ferrule terminal) 20m |
Related information
Last update : 2024/03/05