LTE Module 4 20 mA Controller RS485 Modbus Server 4G ROUTER GPS
MODEM
- Introduction of 4 20 mA Controller
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.
Parameters of 4 20 mA Controller
| 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 4 20 mA Controller 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.
Operating Mode:
Host mode: In this mode, the server can send Modbus data (the address is the
product address) to communicate with the product. If the sent data
cannot be identified by the product, it will forward the data to
the RS485 bus where the product is located; Devices on the same
RS485 bus can also send Modbus data (the address is the product
address) to communicate with the product. If the data cannot be
identified by the product, it will forward such data to the server.
Slave mode: In this mode, the server can send Modbus data (the address is the
product address) to communicate with the product. If the sent data
cannot be identified by the product, the data will be directly
discarded and will not be forwarded; Devices on the same RS485 bus
can also send Modbus data (the address is the product address) to
communicate with the product. If the data cannot be identified by
the product, such data will be directly discarded and no longer
forwarded.
Special Functions:
Serial Heartbeat
Function description: The serial port sends out the specified data
regularly
Serial port heartbeat 1~serial heartbeat 4 register address:
40789~40828 (0x0314~0x033B)
Support function codes: 03 (read holding registers), 10 (write
multiple holding registers)
Default value: all 0x00
Register package function
Function description: "Registration package" is used in the server
to identify device data. The registration package supports two
types: "connect to send" and "data carrying". "Connect to send"
means to send a registration package when the device establishes a
connection with the server. "Data carrying" means that the device
carries the registration package before the data and sends it to
the server.
Heartbeat packet function
Function description: "Heartbeat package" is used to maintain a
long connection between the server and the device
Default value: 0x0001
Heartbeat packet holding register address: 41379~41391
(0x0562~0x56E)
FAQ
Q1. How can we know the product quality?
A1: We have professional QA and QC teams, 100% quality inspection
is performed before the goods out of the factory.
Q2:Can I have a small order? what's ur MOQ?
A2: Welcome to order sample to test and check quality. MOQ is 1 for
normal item.
Q3: If I am not familiar with the operation, do you have a manual
to help?
A3: Our Software, User Manual and Programme case can be downloaded
freely on our official website, or you could consult the sales for
those documents.Meantime, we have engineers team who could do help
on your technician problem and give you useful solution.
Q4: Does your factory have the design and development capabilities,
can you factory accept customized products?
A4: Our R&D department are well experienced in the IoT
industry, We can make customized products especially for you.
| ZHC4661 |
RS485 Modbus | √ |
RS485 Automatic Acquisition | √ |
Virtual Serial Port | √ |
Connfiguration Software | √ |
Threshold Report | √ |
| Configuration Software Docking | √ |
Modbus RTU/TCP | √ |
