JW-D541(H02) 4G CAT1 DTU Serial Gateway is an industrial data transmission terminal designed to connect RS232 and RS485 serial devices to 4G cellular networks. It supports TCP UDP HTTP MQTT peer to peer transmission SMS transparent transmission Modbus gateway JSON reporting offline cache and remote AT commands, making it suitable for industrial automation, smart metering, environmental monitoring, power systems, transportation, fire safety, agriculture, and remote equipment management.
2. Product Overview
JW-D541(H02)4G CAT1 DTU Serial Gateway HY D541 provides reliable serial to 4G cellular data transmission for industrial IoT applications. It supports both RS232 and RS485 interfaces, allowing field devices such as meters, controllers, sensors, PLCs, and industrial instruments to upload data to cloud servers or remote monitoring platforms through 4G CAT1 networks.
With 9 to 36V wide voltage input, software and hardware watchdog protection, remote upgrade, remote AT command support, and multiple exception handling mechanisms, HY D541 is designed for stable operation in demanding industrial environments.
The product supports 4 Socket transparent transmission channels, mainstream protocols such as TCP UDP HTTP MQTT, SMS transparent transmission, Modbus polling, Modbus TCP RTU conversion, and Modbus data collection with JSON reporting.
Item
Specification
Product Type
4G CAT1 DTU Serial Gateway
Model
HY D541
Cellular Network
4G CAT1
Serial Interfaces
RS232 and RS485
RS232 Interface
3P pluggable terminal 3.81mm
RS485 Interface
2P pluggable terminal 3.81mm
Power Input
9 to 36V
Power Current
100mA at 12V
Power Interface
Pluggable terminal 3.81mm
LTE FDD Bands
B1 B3 B5 B8
LTE TDD Bands
B34 B38 B39 B40 B41
LTE FDD Data Rate
Uplink 5Mbps Downlink 10Mbps
LTE TDD Data Rate
Uplink 2Mbps Downlink 8Mbps
LTE Transmit Power
Class 3 23dBm
Baud Rate
1200 to 460800bps
Default Baud Rate
115200bps
Parity
NONE ODD EVEN
Data Bits
7 or 8
Stop Bits
1 or 2
Hardware Flow Control
NFC or 485
USB Interface
Micro USB
Network Protocols
DNS TCP UDP PING
Transmission Protocols
TCP Client UDP Client HTTP MQTT Peer to Peer
SMS Function
SMS transparent transmission SMS AT command
Modbus Function
Modbus gateway Modbus polling JSON reporting
Positioning
Optional GPS and base station positioning
Offline Cache
20KB up to 50 data records
AT Commands
Serial AT Network AT SMS AT
Remote Management
Status monitoring parameter setting remote upgrade
Device Maintenance
Local upgrade network upgrade exception handling
Operating Temperature
-35°C to 70°C
Operating Humidity
5% to 95%
Dimensions
89 x 64 x 25 mm excluding side ears antenna connector and terminals
3. Interface Description
Interface
Function
Antenna Connector
4G antenna connection
SIM Card Slot
SIM card installation
Micro USB
Local configuration or upgrade interface
RS232 Terminal
RS232 serial device connection
RS485 Terminal
RS485 serial device connection
9 to 36V Power Terminal
Wide voltage power input
IO Reserved Port
Optional customized IO input or output
Reload Button
Restore default parameters
Power LED
Power status indication
WORK LED
Network registration and running status
DATA LED
Server connection and data transmission status
4. Application Scenarios：
Industrial Automation: Connect PLCs, controllers, inverters, production equipment, and industrial meters to remote servers through 4G networks.
Smart Metering: Transmit data from water meters, electricity meters, gas meters, heat meters, flow meters, and pressure meters using RS485 or RS232 interfaces.
Environmental Monitoring: Use the DTU for weather stations, hydrological stations, air quality monitoring, water quality monitoring, and remote environmental data collection.In remote flood monitoring stations, the 4G DTU can transmit data from RS485 rain gauges, radar water level sensors, and field controllers to a cloud platform. Its Modbus polling, MQTT or HTTP communication, and offline cache functions make it suitable for a 4G flood monitoring network.
Power and Utility Monitoring: Deploy HY D541 in power distribution rooms, pump stations, energy management systems, and remote utility monitoring projects.
Transportation and Fire Safety: Support remote communication for traffic monitoring devices, fire alarm systems, emergency equipment, and safety supervision terminals.
Agriculture and Forestry: Connect irrigation controllers, soil sensors, greenhouse monitoring devices, pump controls, and forestry monitoring stations to cloud platforms.
ining and Remote Sites: Use 4G cellular transmission for remote equipment monitoring where wired networks are difficult to deploy.
FAQ
Q
1. What is the JW-D541(H02) 4G CAT1 DTU used for?
A
JW-D541(H02) is used to transmit RS232 or RS485 serial data through a 4G CAT1 cellular network to remote servers, cloud platforms, or monitoring systems.
Q
2. Does JW-IoT provide 4G CAT1 DTU solutions?
A
Yes. JW-IoT provides 4G CAT1 DTU solutions for industrial automation, smart metering, environmental monitoring, power systems, and remote equipment management.
Q
3. Which serial interfaces does this DTU support?
A
The device supports both RS232 and RS485 interfaces. Users can connect serial meters, PLCs, controllers, sensors, and industrial instruments.
Q
4. What communication protocols are supported?
A
JW-D541(H02) supports TCP Client, UDP Client, HTTP, MQTT, peer to peer transmission, and SMS transparent transmission.
Q
5. Can JW-D541(H02) support Modbus data collection?
A
Yes. JW-D541(H02) supports Modbus gateway functions, Modbus active polling, Modbus TCP RTU conversion, and JSON data reporting.
Q
6. Does the DTU support offline data cache?
A
Yes. The device supports offline cache. It can temporarily store data when offline and upload cached data after the network is restored.
Q
7. Can this product be configured remotely?
A
Yes. It supports remote AT commands, remote device management, remote upgrade, and parameter read or write operations.
Q
8. Is GPS supported?
A
GPS is optional. The product can also support base station positioning depending on project requirements and hardware configuration.
Q
9. Why choose JW-IoT for 4G DTU projects?
A
JW-IoT can provide 4G DTU hardware, serial communication integration, Modbus data acquisition, MQTT or HTTP cloud access, and complete industrial IoT communication support.
+86 13520127780 
info@jingelway.com
