The Denki Seigyo DSWM-S4G-RS485 is a compact industrial wireless communication module combining 4G CAT.1 cellular connectivity with an RS-485 serial interface.
The module enables existing RS-485 equipment to communicate with remote monitoring systems without requiring direct Ethernet or Wi-Fi connectivity. Its transparent data transmission architecture makes it suitable for integrating industrial controllers and meters into remote monitoring and IoT applications.
Product Overview
The DSWM-S4G-RS485 is engineered for:
- Remote RS-485 equipment communication
- Industrial IoT connectivity
- Machine data transmission
- Remote monitoring
- Cloud-based equipment management
- Distributed automation systems
The module uses a SIM-based 4G connection and provides an external antenna interface for reliable cellular communication.
Special Features of DSWM-S4G-RS485
4G CAT.1 Wireless Communication
The module provides cellular connectivity for industrial equipment installed at locations where wired Ethernet or Wi-Fi is unavailable or inconvenient.
Transparent Data Transmission
RS-485 serial data can be transmitted between industrial equipment and a remote server through the 4G network without changing the original serial communication architecture.
Multiple Network Protocols
The module supports common communication protocols including:
- TCP
- UDP
- MQTT
- HTTP
- DNS
Industrial RS-485 Interface
The integrated RS-485 interface supports a wide range of baud rates and serial communication configurations for compatibility with industrial controllers and meters.
Compact Industrial Design
The compact housing allows installation inside control panels, automation cabinets and machine enclosures.
Key Features
✔ 4G CAT.1 cellular communication
✔ SIM-based wireless connectivity
✔ RS-485 industrial communication interface
✔ Bidirectional transparent data transmission
✔ TCP / UDP communication
✔ MQTT support
✔ HTTP support
✔ DNS support
✔ RS-485 baud rate up to 230400 bps
✔ External SMA antenna interface
✔ Wide 8–28 VDC power supply
✔ PWR / STATE / DATA / LINK LED indicators
✔ DIN rail / panel mounting
✔ Compact industrial housing
✔ Conformal-coated PCB
✔ Wide operating temperature range
✔ Suitable for industrial IoT applications
Available Model
| Model | Communication | Interface | Application |
|---|---|---|---|
| DSWM-S4G-RS485 | 4G CAT.1 | RS-485 | Industrial wireless communication |
Model Structure
Example: DSWM-S4G-RS485
| Code | Description |
|---|---|
| DSWM | Denki Seigyo Wireless Module |
| S | SIM / Cellular Communication |
| 4G | 4G CAT.1 Cellular Network |
| RS485 | RS-485 Communication Interface |
Technical Specifications
General Specifications
| Parameter | Specification |
|---|---|
| Product Type | 4G Wireless Communication Module |
| Communication Technology | 4G CAT.1 |
| Communication Interface | RS-485 |
| Data Transmission | Bidirectional Transparent Transmission |
| SIM | SIM Card |
| RF Interface | SMA-K |
| Antenna | External 4G Antenna |
Electrical Specifications
| Parameter | Specification |
|---|---|
| Power Supply | 8–28 VDC |
| Recommended Supply | 24 VDC |
| Current | Model dependent |
| Serial Interface | RS-485 |
| Connector | Spring Terminal |
| Terminal Pitch | 2.54 mm |
RS-485 Communication
| Parameter | Specification |
|---|---|
| Interface | RS-485 |
| Baud Rate | 1200–230400 bps |
| Default Baud Rate | 115200 bps |
| Data Bits | 8 |
| Stop Bits | 1 / 2 |
| Default Stop Bit | 1 |
| Parity | None / Odd / Even |
| Default Parity | None |
Network Communication
| Protocol | Support |
|---|---|
| TCP | Supported |
| UDP | Supported |
| MQTT | Supported |
| HTTP | Supported |
| DNS | Supported |
Cellular Network
| Parameter | Specification |
|---|---|
| Cellular Technology | 4G CAT.1 |
| LTE-FDD | B1 / B3 / B5 / B7 / B8 / B20 / B28 |
| LTE-TDD | B38 / B40 / B41 |
| SIM Interface | SIM Card |
| Antenna Interface | SMA-K |
Cellular-band availability may vary according to regional network requirements
LED Indicators
| Indicator | Function |
|---|---|
| Green PWR LED | Power indication |
| STATE LED | SIM / cellular network status |
| DATA LED | RS-485 data transmission |
| LINK LED | Server connection status |
The LED indicators provide quick visual information about module power, network registration, serial data activity and server connectivity.
Mechanical Specifications
| Parameter | Specification |
| Dimensions | 80 × 28 × 27 mm |
| Weight | Approx. 40 g |
| Mounting | DIN Rail / Positioning Hole |
| Housing | Industrial Enclosure |
| RF Connector | SMA-K |
| RS-485 Connection | Spring Terminal |
| PCB Protection | Conformal Coating |
Environmental Specifications
| Parameter | Specification |
|---|---|
| Operating Temperature | −40°C to +85°C |
| Environmental Protection | Conformal Coating |
| Moisture Resistance | Yes |
| Mildew Resistance | Yes |
| Salt-Spray Resistance | Yes |
Communication Architecture
The DSWM-S4G-RS485 can be used as a communication bridge between industrial RS-485 equipment and remote servers.
RS-485 Industrial Equipment
↓
DSWM-S4G-RS485
↓
4G CAT.1 Network
↓
Internet / Cloud
↓
Remote Server / SCADA / IoT Platform
Typical Connected Devices
The DSWM-S4G-RS485 can be connected to:
- PLCs
- Energy meters
- Power meters
- Temperature controllers
- VFDs
- Industrial sensors
- Remote I/O modules
- Data loggers
- HMI controllers
- Automation controllers
Applications
The DSWM-S4G-RS485 is suitable for:
- Industrial IoT
- Remote PLC monitoring
- Machine monitoring
- Energy monitoring
- Power meter communication
- Remote equipment monitoring
- SCADA systems
- Water and wastewater monitoring
- Solar power monitoring
- Pump monitoring
- Generator monitoring
- HVAC monitoring
- Factory automation
- Remote data acquisition
- Smart energy systems
- Distributed industrial automation
Installation
The DSWM-S4G-RS485 can be installed inside:
- Industrial control panels
- Automation cabinets
- Machine control panels
- Electrical enclosures
- Remote monitoring panels
The external SMA antenna provides flexibility for positioning the antenna in locations with better cellular signal reception.
Why Choose Denki Seigyo DSWM-S4G-RS485?
✔ Reliable 4G CAT.1 connectivity
✔ Easy integration with RS-485 equipment
✔ Transparent serial data transmission
✔ Multiple industrial communication protocols
✔ Compact industrial construction
✔ Wide 8–28 VDC supply range
✔ Wide operating temperature range
✔ DIN-rail and panel installation
✔ Suitable for remote monitoring and IoT
✔ Cost-effective solution for wireless industrial communication
Ordering Information
| Model | Network | Interface | Supply | Mounting |
|---|---|---|---|---|
| DSWM-S4G-RS485 | 4G CAT.1 | RS-485 | 8–28 VDC | DIN Rail / Panel |
Product Summary
The Denki Seigyo DSWM-S4G-RS485 is an industrial 4G CAT.1 wireless RS-485 communication module designed to provide reliable remote connectivity for PLCs, meters, controllers, sensors and other RS-485 equipment.
With 4G cellular communication, transparent data transmission, TCP/UDP/MQTT/HTTP support, RS-485 connectivity, external antenna interface and compact industrial construction, the DSWM-S4G-RS485 provides a practical solution for industrial IoT, remote monitoring, SCADA, energy monitoring and machine automation applications.
What is a 4G RS-485 communication module?
A 4G RS-485 communication module connects industrial RS-485 equipment to a cellular network, allowing data to be transmitted to remote monitoring systems and servers.
What is the DSWM-S4G-RS485 used for?
The DSWM-S4G-RS485 is designed for remote monitoring, industrial IoT, PLC communication, machine data transmission, energy monitoring and other applications requiring cellular connectivity for RS-485 equipment.
Can the DSWM-S4G-RS485 connect to a PLC?
Yes. The module is designed to provide an RS-485 communication interface for compatible PLCs and other industrial serial devices.
Is the DSWM-S4G-RS485 suitable for industrial IoT?
Yes. Its 4G CAT.1 cellular communication and support for network protocols such as TCP, UDP, MQTT and HTTP make it suitable for industrial IoT and remote monitoring applications.
What is the difference between RS-485 and 4G communication?
RS-485 provides the local industrial serial connection between the module and equipment, while 4G provides the wireless connection between the equipment and a remote server or cloud platform.
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