The CMCP530 Accelerometer based
Velocity Transmitter is available in either "Peak" or "True RMS" signal
detection versions and English or Metric scaling. The CMCP530 is
compatible with all 100mV/g output accelerometers, and provides a 4-20
mA output proportional to the overall measurement. Each unit provides
constant current power for the accelerometer, checks for faults,
processes the vibration signal to determine overall amplitude, and
outputs a 4-20 mA dc current that is proportional to a user selectable
range of 0.5, 1.0, 1.5, 2.0 and 2.5 in/sec (metric equivalent of 12.7,
25.4, 38.1, 50.8 and 63.5 mm/sec) with a 100 mv/g Input. Combining
transmitters with an existing PLC or DCS system results in a high
density, low cost vibration monitoring system.
The Optional Alarm Module provides ok,
alert and danger relays, selectable time delay, trip multiply, bypass
and 0 to 5 VDC outputs for displays. The relay outputs can be used to
trigger machine shut-down or other alarms.
Custom Input and Output Calibrations are Available on Request.
A BNC connector mounted on the front of the unit provides access to the buffered transducer output signal. This includes both the unfiltered vibration signal, and the DC bias voltage. Portable test equipment or analyzers can be connected to this output without disturbing other system outputs.
On board fault detection circuitry continuously monitors the transducer for normal operation. If a fault occurs, the output current is reduced to <2 mA to indicate the fault to the readout system. A green LED on the front of the unit is turned off to provide a local indication of the fault.
For applications that require monitoring specific frequency bands, optional high-pass and low-pass filters can be specified. These filters are modular and can be installed by the factory or in the field. Each module attenuates out-of-band signals at a rate of approximately 24 dB/octave. Corner frequencies from 2 Hz to 20 kHz may be specified. Filter modules may be cascaded to form higher order filters or to create a band-pass response. Filtering does not effect the buffered transducer output.
Alarms relays and trip multiply are
available with the Monitor version
Alarms - The CMCP500A Series Monitors have
two independent set points, with LED alarm indicators and output relay contacts
(Alert and Danger). Set points are adjustable via potentiometer, from 0 to 110%
of full scale. Each has an adjustable delay of 1 to 10 seconds. SPST Relay
contacts are rated 5 Amps @ 30 Vdc or 250 Vac for resistive loads.
Relay contacts can be independently
configured by the user for either Normally Open (NO) (Standard) or Normally
Closed (NC) operation. Relays are normally de-energized and can be configured
for latching or non-latching (standard) operation. Latched alarms may be reset
locally or by remote contact closure.
Trip Multiply - The monitors
have set point multiplication of 3X via contact closure (2X available). To
avoid tripping the alarms during machine start-up.