V385 8-channel VME strain gage/load cell module

Strain Gage/Load Cell Module- V385
  • Excites and measures up to eight strain gage load cells
  • Separate, remotely sensed excitation supply for each channel
  • 24-bit ADC per channel
  • 100 dB CMRR
  • Clean, logical VME bus interface is well suited to PLC-based weighing applications
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The V385 is a VME/VXI compatible eight-channel strain-gage 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

PDF Datasheet: V385 strain gage/load cell module

PDF Manual: V385 strain gage/load cell module

V385-1: 8-channel VME strain gage/load cell module