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 CMCP530 is available in ISO Standard (10 Hz to 1 kHZ) and ISO Low Frequency (2 Hz to 2 kHz).
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.
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.
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.