Chengdu Zongheng Intelligence Control Technology Co., Ltd.
Internet of Things Devices and Solutions Provider
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RS485 to LTE 4 20 mA Controller Wireless Control for Agriculture IOT Project
ZHC4661 is an industrial-grade 4G RTU that provides 4 channels of AI, 2 channels of AO and 1 channel of RS485 interfaces, supports Modbus RTU/TCP adaptive, automatic acquisition and active reporting, 4-20mA analog control acquisition, automatic calibration threshold reporting, support one-to-one, many-to-one connection, which can be widely used in power systems.
Antenna: LTE network antenna
SIM: Press the yellow dot on the side of the SIM card slot, pop out the card tray, and insert the SIM card
RESET: restore factory button
DC12~36V (DC power socket): DC12~36V input
DC12~36V (terminals): DC12~36V input
POW: Power indicator
WORK: Equipment operating status indicator
LINK: Network status indicator
DATA: Data transmission indicator
AI: 4~20mA analog signal input
485: RS485 interface
AO: 4~20mA analog signal output
Wiring: PC is connected to ZHC4661 via USB to RS485 tool.
Networking: Insert the SIM card before powering on the device.
Power supply: DC12~36V.
After power-on, open the corresponding serial port, you can configure the ZHC4661 through the host computer
Parameters of ZHC4661
| Analog Quantity | AI | AO |
| Number of Interface | 4 | 2 |
| Satandard | 4*AI 2*GND | 2*AO 2*GND |
| Detection / Output Range | 4~20mA | 4~20mA |
| Serial Port | ||
| Standard | RS485 (A / B) | |
| Baud Rate | 600~921600 bps | |
| Data Bit | 8, 9 | |
| Stop Bit | 0.5, 1, 1.5, 2 | |
| Parity Bit | NONE EVEN ODD | |
| Mechanical Structure | ||
| SIZE | 93*69*25mm(L*W*H) | |
| SHELL | Galvanized Steel Sheet | |
| Work TEMP. | -40℃~85℃ | |
| Storage TEMP. | -40℃~125℃ | |
| Work Humidity | 5~95% | |
| Storage Humidity | 1~95% | |
Function of ZHC4661
The signal current of general instruments is 4-20mA, which means that the minimum current is 4mA and the maximum current is 20mA. When transmitting a signal, consider that there is also resistance on the wire. If voltage transmission is used, a certain voltage drop will be generated on the wire, and a certain error will occur in the signal at the receiving end. Therefore, the current signal is generally used as the standard transmission of the transmitter.
ZHC4661 is a remote control product that supports analog follow and control acquisition.
Support 4 analog inputs, default current detection.
Support 2 analog output, default current output.
Support analog follow and control acquisition.
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| ZHC4661 |
| RS485 Modbus | √ |
| RS485 Automatic Acquisition | √ |
| Virtual Serial Port | √ |
| Connfiguration Software | √ |
| Threshold Report | √ |
| Configuration Software Docking | √ |
| Modbus RTU/TCP | √ |