IO Module
High-frequency sampling of vibration, pressure and rod-drop sensors, crank-angle referenced
IMBU IO Modules offer a high-frequency sampling of vibration, pressure, and rod-drop sensors, crank-angle referenced. Typically, one IO module is required for every 2 compressor-cylinders (2 * head-end and 2 * crank-end).
Multiple IO modules perform cycle-synchronized measurements, which means that across all the IO modules, the exact same cycle is being measured. Besides offloading raw timewave forms for pressure, vibration, and rod-drop to the server, the IO modules also allow cycle-by-cycle analysis. Up to 80 cases per channel are tested on a cycle-by-cycle basis and counters are incremented if certain conditions are met.
Technical specifications
| Size | Depending on hazardous area certification required, multiple packaging options are available |
| Certification | ATEX Zone 2 (lowest cost option) ATEX Zone 1 IIC (Customs Union, Kosha, Peso, etc.) |
| Controller | Freescale controller |
| Pressure inputs | 4 * 4-20mA (2-wire, loop-powered by IO module) |
| Accelerometer inputs | 6 * ICP/IEPE Accelerometers |
| Proximity probe inputs | 2 * – 20 – 0V (Bently Nevada compatible) |
| Pick-up / encoder inputs | 2 * highly flexible inputs suitable to accept both e.g. passive magnetic pickups but also active proximity probes |
| Power | 24VDC |
| Communications | RS485 daisy-chained from Transmitter to all IO modules |
| Digital outputs | 2 * dry contact |
| Sampling frequency | Typically 64kHz, higher frequencies possible |
| Others | Galvanically isolated IO |
