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MODEL V365 VME TACHOMETER/OVERSPEED
MODULE
  • Intelligent 8-channel period/frequency/RPM measurement module.
  • Ideal for signal conditioning of magnetic speed pickups, flowmeters, and encoders.
  • High noise immunity ensures accurate measurement in industrial environments.
  • Internal signal conditioning accepts direct input from common speed sensors.
  • Register-based 16-bit VME module.
  • Incorporates four programmable overspeed/underspeed blocks with independent SPDT relay outputs
The V365 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
Differential signal inputs are signal conditioned, filtered and presented to the inputs of a custom gate array chip which manages period and frequency measurement.
The input signal conditioners can be connected directly to common transducer types ,including variable reluctance or hall-effect magnetic speed pickups, AC line voltage or alternator windings up to 150 volts RMS, optical pickups, reed-switch or signal-conditioned fuel flow meters, contact closures, or other special levels

Four independent programmable overspeed blocks are provided. Each may be aimed at any selected tach channel, and each is programmable to trip on static or latched overspeed or underspeed conditions. Control provisions include relay polarity and startup override, and provision is made for self-test of the overspeed facilities.
MODEL V365 VME TACHOMETER / OVERSPEED MODULE SPECIFICATIONS
FUNCTION 8-channel pulse period measurement and overspeed module
CONFORMANCE Conforms with ANSI/IEEE 1014-1987 VMEbus spec; Meets VXIC VXI spec rev 1.4 for 'B'-size VXI module when used in A16 mode.
PACKAGING Single-width 6U Eurocard
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 tach channels, numbered 0 through 7. Each channel has differential inputs, ground, and +12 volt source.
Input impedance is > 60K 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 100 millivolt to 150 volt RMS signals up to100 kilohertz.
Inputs will tolerate 1000 volt transients for 50 us.
PERIOD MEASUREMENT
RANGE
32 bits 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 diagnostic port provides alternate means of monitoring and configuration. A PC-compatible test/setup program is provided.
CONNECTORS DB37 female connector for signal inputs and current-limited +12 volt excitation outputs. HD15 female connector provides four SPDT relay contacts for overspeed/underspeed function.
2.5 mm stereo phono connector for RS-232 serial port.
Three SMB signal monitor connectors monitor analog and digital signal levels of any selected channel and access test signal frequency
RELAY OUTPUTS Four isolated SPDT overspeed output relays, Fujitsu type FTR-B3.
Contacts rated 1 A at 30VDC, 0.3 A at 120VAC, resistive loads.
INDICATORS Ten LEDs indicate processor heartbeat, VME access, and individual channel trigger activity
Highland Technology V365 VME Tachometer Overspeed Module Data Sheet August 2006
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