The V380 is a VME/VXI compatible eight-channel strain-gauge signal conditioner which is optimized for load-cell weighing applications. The module includes tare (zero reference), DSP-based high-order filtering, averaging, triggered weighing, and other functions not commonly available in conventional strain-gauge signal conditioners. Filtering and averaging are programmable with fine granularity to allow precise optimization of high-speed weighing applications.
All module functions are programmable; except for the VME-bus address switch, the module has no jumpers, switches, or trimpots. All parameters, tare values, and calibration factors are retained in nonvolatile memory.
FUNCTION | 8-channel load cell module |
DEVICE TYPE | Register-based slave: A16:D16:D08(EO) 512-byte data block in bus A16 address range (VME short I/O space) Bus address is set by onboard dipswitch |
CHANNELS | 8 load cells |
EXCITATION | Onboard remote-sensed bridge excitation source, 10-volt standard; 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 | 16 bits (65536 counts) MAX after tare and calibration One 24-bit ADC per channel, 32-bit after filtering, 92.132 pV per LSB |
TARE | On-demand, per-channel subtraction of reference weight up to full-scale signal range |
FILTERING | Programmable digital filtering (Bessel in 0.1 sec, 0.2 sec, and 0.4 sec risetime) and averaging (last N samples) |
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: 0.6 A -12 V: 0.2 A |
CONNECTORS | One front-panel 25-pin D-sub female |
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 |
V380-1: 8-channel VME strain gauge/weighing module