Product Details

YD470 CW/CCW Rotation Speed Monitor

1. Main Function

The instrument is both for speed measurement, display, a nd also for speed and reverse warning alarm.When one of the two input sensors fails, it will automatically switchto another sensor to measure the rotational speed, and in the meantim0.e make a alarm instructions (point out which direction of the sensor is failure), and automatically block reversal protection relay malfunction.

Measurement Rang Selection: Sub-file option is available within 0 to 9999 rev / min speed range, user can have the instrument custom- made while selecting instrument and factory will preset the meter.

Display Function: Rotational speed measurement value, alarm values, function information is show on the display window. Instruction light of different color on the panel coordinate with instrument measurement status give signals. Within full measurement range, the accuracy of the measurement exceeing 1%.

Alarm Function: Proving one stop alarm set point, users can set the stop alarm value of the rotational speed by themselves, and meanwhile the instrument light on the panel can instruct the “stop” alarm, wiring terminal Provide relay output.

Reverse Alarm Function: Provide a “reverse rotation “alarm set point, when the machine reverses, the instrument will alarm at the first time, and instrument light on the panel will instruct “reverse rotation “alarm, wiring terminal provide relay output.

Alarm Reset Function: When alarms, alarm reset is divided into self-locking and automatic reset; while self-locks, alarm status keeping all the way, “reset” key should be pressed after monitoring status is normal, while self-reset, alarm status will relieve automatically after monitoring status is normal. Users can select one of the ways while selecting the instruments.

Self-diagnostic Function: Any input system breakdown, like probe break, wiring fault can be detected, while one of the wiring of the two input sensor breakdown, it will automatically transfer to another one to measure the rotational speed, it will issue a warming indication at the same time (point out which way of the sensor go wrong), to avoid error action for reverse protection, it will automatically cut off reverse protection circuit.

Sensor Power Supply Current Limit Protection: If the sensor power is short circuit in the course of usage by accident, current limit ≤ 30mA,it will not produce sparks and it suitable for the safe requirement of flammable and explosive occasion.

Record Output Function: There are 4~20mA analog signal output on the wiring terminal, measurement range which corresponding with the record output can be set in parameter setting function.(F2), users can adjust by themselves, output terminals are designed with short circuit protection function.

Pulse Output Function: Pulse Output is 0~5V square-wave signal, pulse output equals per minute revolutions of the measured staff multiplied by the gear amount of the measured gear tray .

Speeding and Reverse Rotation Alarm Response Time: Speeding and Reverse Rotation Alarm Response Time is very fast, response delay time <50ms.

Parameter Setting Function: Instrument function using and parameters can be set by the key on the panel; it is smooth operation, convenient and quick.

2. Technical Specification

Input

Sensor input: integrated eddy current sensor;

Input point: 2 point;

Input Impedance: 50KΩ

System Input/Output Transfer Accuracy:

Record Output < ±0.3% 25°C Digital Display < ±0.1% 25°C

Frequency Reponse: 1~18KHz

Record Output: 4~20mA ( Load ≤ 500Ω ) or 1~5V ( Load ≥1KΩ )

Buffered Output: Sensor signal output from the rear of the panel termina l after amplified by the buffer.

Sensor Power Output: 24VDC±10%, 15mA, Short Circuit limite≤30mA

Alarm