The V360 is a single-width, 6U height VME module designed specifically to acquire low frequency inputs from industrial speed sensors. The module can measure frequency and period over a wide dynamic range, and is specifically designed to ensure reliable measurement in high-noise industrial environments.
Differential signal inputs are signal conditioned, filtered and presented to the inputs of a custom gate array chip which manages period and frequency measurement. An on-board microprocessor periodically reads the timer chip, checks and scales data, and loads measured values into a dual-port memory interfaced to the VME bus.
The input signal conditioners can be connected directly to common transducer types, including:FUNCTION | 8-channel signal conditioner/tachometer module |
DEVICE TYPE | 16-bit VME register-based slave: A24:A16:D16:D08(EO) Implements 32 16-bit registers at switch selectable addresses in the VME 16 or 24 bit addressing spaces |
INPUTS | Eight channels, numbered 0 through 7 Each channel has differential inputs, ground, and auxiliary +12 volt source Input impedance is > 60 K to ground on differential inputs Signal level inputs are configurable for standard TTL, open collector, AC generator, and variable reluctance sensor pickups Onboard signal conditioning includes VME-selectable gains, filtering/integration, and trigger levels to accept 10 mV to 150 volt RMS signals up to 100 kHz Inputs will tolerate 1000 volt transients for 50 µs |
RANGE | 32 bit period measurement with 20 ns LSB resolution, approximately 85 seconds maximum period Transparent interlock logic allows skew-free reading of 32-bit period data |
ACCURACY | ±0.005% ±1 LSB |
RS-232 PORT | 9600 baud RS-232 port is provided This provides for monitoring of module performance and permits channel configuration without requiring host CPU programming |
OPERATING TEMPERATURE | 0 to 60°C; MIL/COTS ranges available |
CALIBRATION INTERVAL | One year |
POWER | Standard VME supplies: +5 V: 0.5 A +12 V: 0.2 A -12 V: 0.15 A |
CONNECTORS | D37 female connector for signal inputs and current-limited +12 volt excitation outputs D9 female connector for RS-232 serial port Two BNC signal monitor connectors present analog and digital signal levels of any selected channel |
INDICATORS | Ten LEDs indicate processor heartbeat, VME access, and individual channel trigger activity |
PACKAGING | 6U single-wide VME module |
CONFORMANCE | VMEbus per ANSI/VITA 1-1994 (R2002) |
V360-1: 8-channel VME tachometer