Geotechnical Dataloggers
GeoNet Digital Vibrating Wire Interfaces
The Model 8960 Series Digital Vibrating Wire Interfaces expand the capacity of GeoNet Dataloggers, Mesh, Cellular, and Wi-Fi® Multi-Channel and Addressable Loggers by allowing users to add additional sensors to the system. The Model 8960 Series also enables the reading of vibrating wire sensors from Modbus® RTU clients using signal conditioning and digital addressing.
The 4- and 8-channel Digital Vibrating Wire Interfaces are also compatible with Model 4900 Vibrating Wire Load Cells. Multiple load cells and VW sensors can be connected to a single interface, provided that the total number of VW gauges does not exceed the channel capacity of the interface.
The Model 8020-38 Addressable Bus Converter is required to connect addressable sensor strings to personal computers, readouts, dataloggers, and programmable logic controllers. The converter acts as a bridge using the TTL or USB protocols between readers and GEOKON RS-485-enabled sensor strings.
| Specifications | |
|---|---|
| Power Supply | 12 VDC |
| Current | 1.2 mA (idle) |
| Maximum Current | 35 mA (180Ω VW Coil), 57 mA (50Ω VW Coil) |
| Interface | RS-485, Half-duplex (two-wire differential) |
| Protocol | Modbus RTU |
| Operating Temperature | −40°C to +80°C |
| L × W × H (Enclosure) |
80 × 125 × 57 mm (single-channel) 180 × 180 × 101 mm (4-channel) 160 × 260 × 91 mm (8-channel) |
| H × Ø (Housing) | 100 × 25 mm (single-channel, Model 8960-01C-CAB) |