The V385 is a VME/VXI compatible eight-channel strain-gauge signal conditioner applicable to generic bridge-type transducer applications. The V385 adds individual remote-sensed excitation supplies to each channel, increasing its precision over the V380's single excitation supply.
Key to the V385's increased precision is a separate remotely-sensed excitation voltage for each channel. Now users can measure up to eight different sensors with different interface cables without the uncertainty of a single sense point for the excitation supply.
The V385's updated firmware accommodates customer requests for faster access to raw sensor data. A firmware version with weighing-specific functions is also available.
FUNCTION | 8-channel load cell module |
DEVICE TYPE | 16-bit VME register-based slave: A16:D16:D08(EO) Implements 128 words (256 bytes) registers at switch selectable addresses in the VME 16 addressing space |
CHANNELS | 8, 6-wire full-bridge-type load cells |
EXCITATION | Per-channel onboard remote-sensed bridge excitation source, 5- or 10-volt switchable; 40mA max per-channel load |
INPUTS | Eight differential inputs CMRR better than 100dB Input impedance is 60 MΩ typical Maximum input ±50 mV (equivalent to 5 mV/V excitation) |
RESOLUTION | One 24 bit ADC per channel |
ADC | One Analog Devices AD7710 24 bit ADC per channel Default setup is G = 1, 24 bit data, 59.91 Hz sample rate ADCs may be user reprogrammed via VME commands |
SYNCHRONIZE | A mechanism is included to synchronize the sample times of all eight ADCs |
OPERATING TEMPERATURE | 0 to 60°C; extended MIL/COTS ranges available |
CALIBRATION INTERVAL | One year |
POWER | Standard VME supplies: +5 V: 1.5 A max +12 V: 0.2 A -12 V: 0.2 A |
CONNECTORS | Two D25 front-panel females |
INDICATORS | Three LEDs indicate microprocessor heartbeat, VME access, and pass/fail status |
PACKAGING | 6U single-wide VME module |
CONFORMANCE | ANSI/VITA 1-1994 (R2002) VMEbus spec |
OPTIONS | Other excitations, signal ranges, filtering available Special software functions are available |
V385-1: 8-channel VME strain gauge/load cell module