Product Overview and Engineering Role
The SimtoLink IEPE piezoelectric accelerometer is a process sensor for IoT. The figures on this page are there for selection, for a bid clause, and for a later maintenance spot check. The sensing and communications path uses an FPGA, so the reading stays predictable across wide temperature, wide pressure, and EMI. The hardware is built to be serviced on site: pluggable terminals, a watchdog and a redundancy check on the critical chips, and signed firmware that can roll back, which suits volume delivery and remote maintenance.
The default interface is a fiber SFP port plus a standard industrial connector, so the accelerometer can join an existing SCADA, energy-management, or IoT platform. SimtoLink supplies a southbound point-list template and northbound MQTT/HTTP push examples, which shortens joint commissioning. Volume projects can add an enclosure legend, harness length, protocol mapping, and a calibration certificate.
Reliability and Site Conditions
On electrical safety and EMC, this accelerometer has cleared the relevant IEC 61000-4 level-4 items. Ports include surge and reverse-polarity protection. Reinforced grounding and a partitioned layout hold down ground loops and common-mode interference. Outdoor or coastal sites can take a higher ingress rating and a corrosion-resistant coating.
Parameters load in bulk, threshold policies can be set, and event video or waveforms can be kept, depending on the model. Configuration and firmware go out by OTA. Before sign-off, run a power-on self-test, sync time on the link, and spot-check a sample. For metering or safety use, SimtoLink helps submit the unit to a third-party metrology institute and provides the type-test documents.
Key Hardware Parameters
These figures are the typical build of this accelerometer, for selection and for a technical clause in a tender. For a wider range, redundant power, or an intrinsically safe explosion-proof variant, ask SimtoLink for the Hardware Specification and the Installation and Commissioning Guide. Order codes in the same family can differ slightly; the nameplate and the papers shipped with the accelerometer govern.
| Parameter | Specification | Remarks |
|---|---|---|
| Measured quantity | Level | Factory calibration certificate |
| Range | 0～10 m/s | Extensible |
| Accuracy / linearity | ±0.16 %FS | Compensated across the temperature range |
| Frequency response | DC～1 kHz | IEPE optional |
| Medium temperature | −21～85 ℃ | Depends on the probe |
| Power supply | DC 12～30 V | Surge protection |
| Output | RS485 | Isolated |
| Process connection | G1/2 thread | 316L stainless steel |
| Protection | IP68 | Continuous submersion |
| EMC | GB/T 17626 level 4 | Industrial sites |
Typical Deployments
Four ways this accelerometer shows up in a project, for scheme design and for judging payback:
Rotating-machine health
Points go on the bearing housing or the casing of pumps, fans, and compressor sets. Kurtosis, envelope, and trend features support predictive maintenance and the spare-parts plan.
Long-term structures and bridges
Key sections of piers, utility tunnels, and high-rises are instrumented to follow modal drift and the response to ambient excitation, which feeds decisions on strengthening and load limits.
Test benches and line inspection
Tied into swept-sine, shock, and endurance benches. Raw waveforms and features are archived so a type test or a customer acceptance stays traceable.
Heavy duty and rail
The accelerometer watches turnouts, cranes, and rail-vehicle bogies for abnormal shocks and the signs of a loose bolt.
Installation, Grounding, and Maintenance
- Check the supply range and polarity before you apply power. Where the bus is shared, confirm voltage and breaker rating with a multimeter.
- Use shielded twisted pair, ground the shield at one end, and do not lay it for a long distance in the same bundle as high-power cables.
- Before the first site cutover, prove bidirectional read and write and a threshold trip against the platform in the lab.
- Outdoors, leave a path for drainage and for air, inspect the gasket faces on a round, and keep the lightning earth resistance inside the local limit.
- While the accelerometer stays in service, spot-check a sample and archive the logs every 12 months.
Ordering, Documentation, and Support
SimtoLink ships a hardware specification, an outline drawing, a wiring table, and a sample project with the accelerometer. Volume orders can include a sample review and an inspection at the factory. Warranty and calibration follow the contract and the papers that travel with the unit.