Our advance 4-20mA vibration transmitters or loop powered sensors, are engineered for use with the latest PLC (programmable logic controller), BMS (building management system), or SCADA (supervisory control and data acquisition) technologies, offering sophisticated solutions for condition monitoring and preventative maintenance.
The purpose of the 4-20 mA analog current loop is to transmit the signal from an analog vibration sensor over a distance in the form of a current signal. ROKADE's loop power sensors output a 4-20 mA current that is proportional to the overall vibration of the equipment or machinery they are monitoring. This output current has a range of 4-20 mA (4 mA normally representing the sensor's zero-level output, and 20 mA representing the sensor's full-scale output).
Only two wires are required to send the current signal and also supply power to the sensor. A loop supply voltage is used to power the remote sensor. The remote sensor regulates the loop current such that the loop current represents the value of the parameter being measured by the sensor. A series resistor RL at the loop power supply converts this current to a voltage that can be used by the process monitor/controller to record or distribute the parameter being measured.
No Additional Power Required
Pulp and Paper
|Mounted Base Resonance||5kHz min|
|Velocity Ranges||see: 'How To Order' table ±10%|
|Nominal 80Hz at 22oC|
|Frequency Response||10Hz (600cpm) to 1kHz (60kcpm) ± 5% - ISO10816|
|Transverse Sensitivity||Less than 5%|
|Case Material||Stainless Steel|
|Maximum Cable Length||1000 metres|
|Standard Cable Length||5 metres|
|Screened Cable||Braided - length to be specified with order|
|Mounting Threads||see: ‘How To Order ’ table|
|Current Output||4-20mA DC proportional to Velocity Range|
|Supply Voltage||15-30 Volts DC (for 4-20mA)|
|Settling Time||2 seconds|
|Output Impedance||Loop Resistance 600 Ohms max. at 24 Volts|
|Case Isolation||>108 Ohms at 500 Volts|
|Operating Temperature Range||-25 to 90oC|
Vibration sensor should be firmly fixed to a flat surface (spot face surface may be needed to be produced and cable anchored to sensor body.)