KM3340 speed transmitter

KM3340The integrated speed transmitter is used in conjunction with magnetic electric or speed switches to monitor the shaft speed of rotating machinery, which is an indispensable part of machine start-up, parking, stable operation, and closed-loop control. The sudden change in rotational speed is also an important symptom reflecting the malfunction of the machine's operating condition,For example, faults such as rotor rubbing, misalignment, stress in the rotor system, and bearing damage will all be manifested in the process of speed changing over time, especially during start-up and shutdown. Therefore, long-term continuous monitoring of the shaft speed of machinery can provide early warnings, avoiding more serious machine damage and unplanned shutdowns.

KM3340The speed transmitter can monitor the high or low shaft speed of rotating machinery stably and reliably for a long time, and is suitable for various types of rotating machinery. It can be equipped with multiple types of speed sensors (such as magneto electric sensors, speed switches, etc.), as long as the input is a sine wave, pulse, or square wave signal. The probe of a general non-contact sensor is installed radially with appropriate clearance on the shaft boss or groove or speed measuring gear plate, facing the sensing body. The use of different sensors has different application requirements for the modulus, number, and distribution of the measuring disc or teeth of the machine. Users need to pay attention to selecting appropriate sensors based on the measurement requirements and on-site conditions of different machines. Users can refer to our sensor selection manual, which provides two types of sensor applications for you to choose from: (speed sensor) and (speed switch).

KM3340The external of the speed monitor is a metal shell, a flexible thin film panel, and the internal uses surface mount components. In terms of technology, the principle of equal precision measurement is applied, and microcontroller technology is carefully designed. This instrument has high-precision speed measurement display and highly reliable overspeed protection function. After long-term operation and testing, its performance is stable, reliable and safe.

KM3340The integrated speed transmitter is easy to install on site and can be installed using guide rails or screws. The transmitter is equipped with a display for easy on-site parameter setting.

2、 Main technical indicators:

◆External power supply: +24VDC±10%

◆merit Consumption: ＜2W

◆lose Enter: Eddy current sensor, magneto electric sensor or speed switch

◆Input points: 1point

◆Output mode 4～20mA(Load ≤500Ω)

★ Note Meaning: Record that the output and input power sources are not grounded together.

◆Alarm method:

Alarm Setpoint 2Point it（+alert, +danger

Relay status Frequent power loss

relay output 2Group normally open relay (caution, danger)

Contact capacity 250VAC/5Aor30VDC/5A

alarm delay 1～9Available within seconds

◆essence Degree:

point show ＜0.1%

standard output ＜0.3%

◆Frequency response: 0.05～10 kHz

◆Work environment:

Operating Temperature -20～70℃

Storage temperature -30℃～85℃

relative humidity 20～95%No condensation

◆Display and parameter adjustment method: Equipped with a built-in display digital tube, parameter adjustment can be directly changed on-site using buttons.

3、 Main functions:

◆quantity Cheng: Optional, users can customize the instrument selection, which is pre-set by the manufacturer.

◆Status indicator light:

OKindicator light: Green light-emitting diode,When it is constantly on, it indicates that the system is working normally;If it doesn't light up,It indicates that the sensor and the connected circuit are not working properly,At the same time, the alarm circuit needs to be disconnected, and the sensors, circuits, or instruments need to be checked. After troubleshooting, the system enters normal monitoring mode, and the lights automatically turn on normally.

ALARMIndicator light: yellow light-emitting diode, used to indicate the alert alarm status; The light on indicates that the alert alarm relay is activated, and the light and relay actions are synchronized.

DANGERIndicator light: red light-emitting diode, used to indicate the danger alarm status; The light on indicates the action of the hazard alarm relay, and the light and relay actions are synchronized.

BYPASSSide street lamp: yellow light-emitting diode. When it is constantly on, it indicates that when the alarm value is reached, the relay does not operate, and the warning and danger alarm indicator lights are on. Its status can be set.

◆Alarm function:

alertAlarm value: Customized by the user during selection, pre-set by the manufacturer or adjusted through the buttons on the panel.

dangerAlarm value: Customized by the user during selection, pre-set by the manufacturer or adjusted through the buttons on the panel.

Alarm delay function: This function of the instrument increases the reliability of the alarm. This delay time is only effective for dangerous relays and is pre-set by the manufacturer or adjusted through buttons on the panel.

◆Alarm reset function:

When an alarm occurs, the alarm state is divided into two modes: self-locking and self resetting; When self-locking, the alarm function is always maintained. After the monitoring situation is normal, it is necessary toRESETKey reset; When self resetting, the alarm function will be automatically released after the monitoring situation is normal. Users can choose one of the methods when selecting instruments, and this function is pre-set by the manufacturer. Or adjust it through the buttons on the panel.. Factory default automatic reset mode.

◆Self diagnostic function:

Any input system malfunction, such as probe rupture, circuit failure, etc., can be automatically detected by the instrument, and the display window will show error code information“OK”The light is not on, and both the "warning" and "danger" alarm circuits are disconnected. The current output is2.0mA左右。

4、 Installation and use

◆System connection

System connection includes connecting sensor probes, transmitters, andDCSThe electrical connections between systems are used to form a measurement system that can be put into operation.

The output of the transmitter should use a mesh shielded cable, and the shielding layer of the shielded cable should be connectedDCSOne end of the system is connected to the signal ground at a single point, that is, the front-end of the shielding layer is not connected,DCSSystem grounding.

The total length of the original signal output cable of the transmitter shall not exceed300Otherwise, the signal attenuation will be too large.

The connection diagram is as follows:

◆Sensor installation

● The speed switch can be operated bySIGTheCOMandPOW(+15V)Three terminal input, when installing the sensor, install it at a distance from the top of the gear1-3mmLeft and right distance, just fix the sensor.

● The speed sensor can beSIGandCOMInput at both ends, install the sensor at a distance from the tooth top1.5mmLeft and right distance, fixed.

◆ Installation of transmitter

transmitterThe requirements for the working environment are much stricter than those for probes. It is usually installed far away from hazardous areas, and the surrounding environment should be free of corrosive gases, dry, with minimal vibration, and the ambient temperature should not differ much from room temperature. Installed next to the machine to ensuretransmitterIt is necessary to use a dedicated installation box for safe and reliable work.

In order to prevent interference caused by different ground potentials, a single point grounding must be used. The transmitter housing is made of aluminum casting. In order to shield external interference, the housing has been connected to the signal terminal inside the transmitter; The installation base plate and guide rail socket are both made of engineering insulating plastic, which ensures that the transmitter housing is isolated from the ground when installing the transmitter(That is, 'floating ground').

5、 Integrated axis displacement transmitterInstallation mechanical diagram:

Overall dimensions:Height x Length x Depth=121mm×71mm×67mm(Minimum depth after adding wiring terminals)80mm）

◆Parameter Settings:

In the parameter setting state, the left display window on the panel displays the parameter category to be set, and the right display window displays the parameter status (parameter value) to be set.

◆Button Instructions

On the instrumentFunctional OperationsWhen switching between different settings, store the set parameter values in the machine, and then enter the next parameter setting state;

On the instrumentFunctional OperationsWhen, shift the digital loop to the left1Position;

On the instrumentFunctional OperationsWhen, increase the corresponding digit1；

Clear the instrument's memory of alarm status and danger, reset the relay,During the parameter setting process, pressing this key will exit the current parameter setting.

◆Parameter Settings:

press The key can cyclically change the number of digits required to set parameter values, while the corresponding digit's digital display flashes.

press The key can increase the current flashing value1Thus, the numerical values can be adjusted from0to9Cycle changes.

Note: At any time during the above setup process, pressing the reset button can terminate the current setup

◆Instructions for setting the number of sensing bodies

When using this instrument for speed measurement, the following parameters are involved:

Z- Number of sensing bodies (number of teeth)

N- Speed (instrument display value)

F- Input signal frequency

N=60*F/Z