ACAL Microsystems now brings to the market an LVDT/RVDT to Digital Converter on a PC104 card.
Designated 73LD4, this PC104 DSP based, stack through module offers six independent, transformer isolated, programmable LVDT/RVDT tracking converter measurement channels, each with 16 bit resolution. Each channel has an accuracy of +/- 0.025%, accurate digital velocity output, differential incremental encoder (A&B) outputs with programmable resolution and a zero degree marker pulse.
There are many built in features, for example the module has a self calibrating facility which does not require the module to be removed for calibration, continuous background testing with Excitation and Signal loss detection and an optional programmable excitation reference supply for each channel.
The versatility of this unit is far reaching. The unique design requires only a single +5 VDC power supply, operates over a frequency range of 360Hz to 10KHz and has autoranging input between 2 Vrms and 28 Vrms. Each unit includes two banks of 8 (16 total) digital input / output channels - programmable for each bank with a latch feature for reading all channels simultaneously. Additionally, each channel can be programmed for 2 wire or 3, 4 wire inputs. The board can be supplied as an option with a reference generator for the LVDT/RVDT
The 73LD4 provides continuous background Built in Test (BIT) on all functions and channels, including reference and signal loss detection and is completely transparent to the user, needs no programming and does not interfere with the normal operation of the card.
March 2007