Cement Drum Sensor Rotation Speed and Orientation Detector DZ300 High/Low Digital RS232 Output
1 OverviewThe DZ300 is one kind of magnetic proximity sensors, which is specially designed for rotation speed and orientation detection. It has RS232 output as well as high/low digital outp
The DZ300 is one kind of magnetic proximity sensors, which is specially designed for rotation speed and orientation detection.
It has RS232 output as well as high/low digital output. The RS232 output the rotation speed in rpm and orientation in specified protocol of Dingtek. The high/low digital line output high or low according to the different orientation, clockwise or anti-clockwise.
It is applicable for rotation system, the speed of which is in 0-120 rpm. Especially it can be applied to status detection of mixing or discharging for the cement drum. Therefore, it can be used to detect if there is illegal discharging (output/unload) for the cement drum vehicle. Also, it can be used to detect the status of the fixed cement drum device with the embedded system or SCADA.
Furthermore, DTU or PLC or GPS tracker can work with this sensor.
Cement mixer fleet management
Mixing device management
Other rotation device management
2* high/low digital line
Magnetic proximity detection
-20 ~ +70℃
-40 ~ +85℃
Optional for zigbee, wifi
5 Mechanical Size
(Notes: only for reference, real product update frequently without notification.)
6 Interface Definition
Red line: +10~32VDC.
Black line: GND.
Green line: RS232 Tx/RS485 A.
Yellow line: RS232 Rx/RS485 B.
Brown line: A->B high level
White line: B->A high level
(Notes: If there is label on the sensor, please use it as the final decision.)
7.1 with PC by RS232
7.2 with PC by RS485
7.3 with GPS Tracker by RS232
7.4 with GPS Tracker by RS485
7.5 with GPS Tracker by High/Low level line
8 Status List
The high level volt is about 0.7V less than the power supply. For example, if power supply is 24VDC, the high level volt is about 23.3V.
9 Protocol & Test
9.1 Communication Setting
For the RS232 communication, Baudrate 9600, data bit 8, stop bit 1, no odd/even checksum.
9.2 Packet Format
Header 1 byte，$ in ascii and in hex 0x24 for the request to sensor. And * in ascii and in hex 0x2A for the reply from sensor. Tail 2 byte, in hex 0x0D 0A.
Refer to command list at Part 3. For command in reply is same as the command in request.
Sum of bytes from header to id, then select the low 8 bit, finally convert to ASCII and show in Hex. E.g. If sum is 0x0356, then low 8 bit is 0x56, to ascii, the value is 56(0x35 0x36 in Hex).
9.3 Command List
read speed in rpm
Request Direction of rotation for sensor 01
Reply for direction
Request of speed
Reply for speed in rpm
104rpm is current speed.
10 Installation & Cases
10.1 Frame Installation
Wield the fixing frame (made by user according to the machine) with vehicle.
Put the sensor face the track of the bolt on the drum as below.
Move the magnetic part pass through the sensor A->B and B->A, measure the output of high/low level line or RS232 line to confirm the sensor works successfully. If not work, user maybe switch the magnetic part because only one side activate the sensor, the other side does not active the sensor.
Stick the magnetic part at the bolt on the drum. While drum rotation, magnetic part should pass through the sensor A->B or B->A.
Adjust the sensor position, recommend 1 cm from the sensor to the magnetic parts.
Generally the magnetic part force is strong enough to stick to the bolt. If not, user should use glue to fasten the magnetic part to the bolt.