(under construction)
Description
This resistance measurement node gives a flexible solution to field measurements of common low-value resistive sensors in various configurations. It can measure values of a resistive sensor in quarter-bridge, half-bridge or full-bridge configurations. In addition, the device can measure 'straight' resistors, potmeters, small-signal DC voltages and thermocouples.
img bridge
comp
comp
img
bridge
bridge
img
half
half
img
quarter
quarter
img
pt100
pt100
img
thermo
thermo
img
potmeter
potmeter
img
dc
dc
Functionality
- Sample rate 1000Hz down to 1/60Hz
- Cable compensation using 3-wire measurements
- Various filtering options
- Capture min/max/avg at slow message rate
- Bus ID assigned via serial number
- Configuration & firmware update via gateway device
- Possibility for custom firmware with specific signal processing functions

Specifications
- Full-bridge + cable compensation: 2mV/V for 100%, 1 channel
- Full-bridge: 2mV/V for 100%, up to 2 channels
- Half-bridge: 1mV/V for 100%, up to 4 channels
- Quarter-bridge mode: 1mV/V for 100% with build-in reference
- Resistance & potentiometer (single-ended): max 3kΩ, up to 6 channels
- Resistance (differential): max 3kΩ, up to 3 channels
- Voltage (single-ended): max 3V at unity gain, 25mV at gain=128, up to 6 channels
- Voltage (differential): max ±3V at unity gain down to ±25mV at 128× gain, up to 3 channels
- Thermocouple: max 3V at unity gain down to 25mV at 128× gain, up to 3 channels
* multi-channel inputs are always in the same IS group.
Specifications
- Excitation source 10µA-1.6mA, max 3.3V
- 24-Bit delta-sigma analog digital converter
- Cold-junction temperature measurement near connector block
- Sensor input galvanically isolated from CAN-bus, intrinsic safe 500V isolation made of 1.5mm solid material
- Operating voltage 9-38VDC, <1W
- 8-Way 3.5mm screw terminal connection
- Ground and 'hazardous-GND' individually terminated to enclosure/earth via 1nF class Y1 safety capacitors <--li>M4 earth-strap terminal + braided copper DIN-rail 'touch-contact'
- DIN rail enclosure 101x80, width 17.5mm
- T-Bus CAN-bus connection // 4-Pin 3.81mm terminal block (both plugs included)
- ATEX (IEC 60079) 'ec' & 'ic'
Availability
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