# PG46-DC RS485/Ethernet 4G LTE Router (DC Power)

> DC-powered RS485 and Ethernet 4G LTE router for remote monitoring and networking of industrial serial and Ethernet equipment.

- **URL**: https://www.iiotsys.net/products/pg46-dc-rs485ethernet-4g-lte-router-dc-power
- **Markdown**: https://www.iiotsys.net/products/pg46-dc-rs485ethernet-4g-lte-router-dc-power.md
- **Model**: PG46-DC
- **SKU**: IIS-SG-PG46-DC
- **Price**: $65.00 USD
- **Category**: Industrial Routers & Switches

## Overview

The IIoTSys PG46-DC is an RS485 and Ethernet 4G LTE router for remote monitoring and networking of industrial serial and Ethernet equipment. This DC-powered model accepts 9–48 VDC @ 1 A. It uses a MIPS microcontroller at 320 MHz, with 16 MB Flash and 32 MB SRAM, and runs the OpenWRT Linux operating system.

Two 4G band options are available. Each option combines LTE-FDD and LTE-TDD bands in one selection. Check the selected option against the intended mobile operator before deployment. The device uses a Nano SIM card with 1.8 V or 3 V support and has an SMA cellular antenna connector. The band selection identifies the supported 4G radio bands, rather than a guaranteed connection on every network. The technical specifications list non-CA LTE Category 4, with LTE-FDD rates up to 50 Mbps uplink and 150 Mbps downlink, and LTE-TDD rates up to 35 Mbps uplink and 130 Mbps downlink.

The unit provides one 10/100M Ethernet port. The port defaults to LAN and can be configured as WAN; when used as WAN, it can connect to a router LAN port for network access. Network working modes include transparent transmission, HTTP, MQTT, and WebSocket. The device supports a maximum of 5 TCP or UDP connections, with a 1400-byte data cache for each connection. Documented network protocols include IP, TCP, UDP, DHCP, DNS, HTTP server and client, ARP, AutoIP, ICMP, Telnet, NTP, and Modbus TCP. VPN support includes PPTP, L2TP, and L2TP+IPSEC. APN is supported. Modbus functions include Modbus master and Modbus TCP to Modbus RTU conversion. These functions cover serial and Ethernet networking without requiring a change to the connected equipment's interface.

The serial interface is one RS485 port. Serial framing includes 7 or 8 data bits, 1 or 2 stop bits, and None, Even, or Odd parity. Software flow control is specified. The baud range is labeled TTL: 2400–460800 bps. Connect A+ to A+ and B− to B−. Pin 6 is the RS485 GND and is usually left unconnected; a shared GND connection is suggested when interference is very severe. The RS485 interface operates in half-duplex mode. It supports up to 32 devices and a maximum cable length of 1200 m. The installation instructions call for a 120 Ω termination resistor when cable length exceeds 300 m.

Configuration is available through serial AT commands and companion configuration software over the serial or network connection. Registration packets and heartbeat packets can combine ICCID, IMEI, IMSI, software version, and cellular connection status. Firmware updates are available through UART and network OTA. The technical specifications also list TLS v1.2, AES 128-bit, and DES3. Scheduled remote-management working time can limit operation to a defined period to reduce data usage.

The enclosure measures 102.03 × 64.95 × 27.50 mm and mounts on a C45 guide rail. Operating temperature is −40 to +70 °C. Storage conditions are −40 to +85 °C and 5–95% RH without condensation. Net, Active, Power, and Link indicators show cellular network status, Ethernet or UART activity, power, and server connection status. After power-up, hold Reload for more than 3 seconds and release to restore factory settings. Reset performs a hardware reset.

## Description

RS485 and Ethernet 4G LTE router with two band options and 9–48 VDC @ 1 A input. Supports transparent transmission, HTTP, MQTT, WebSocket, VPN, APN, Modbus master, and Modbus TCP to Modbus RTU conversion.

## Specifications

- Model: PG46-DC
- SKU: IIS-SG-PG46-DC
- Product type: RS485 and Ethernet 4G LTE router
- 4G band options: Each option combines LTE-FDD and LTE-TDD bands
- CN 4G bands: B1 / B3 / B5 / B8 / B38 / B39 / B40 / B41
- GL 4G bands: B1 / B2 / B3 / B4 / B5 / B7 / B8 / B12 / B13 / B18 / B19 / B20 / B25 / B26 / B28 / B38 / B39 / B40 / B41
- LTE category: Non-CA CAT4, as stated in the technical specifications
- LTE data rates: FDD: up to 50 Mbps uplink / 150 Mbps downlink; TDD: up to 35 Mbps uplink / 130 Mbps downlink, as stated in the technical specifications
- Processor: MIPS microcontroller, 320 MHz
- Memory: 16 MB Flash / 32 MB SRAM
- Operating system: OpenWRT Linux
- Serial interface: 1 × RS485
- Serial wiring: Connect A+ to A+ and B− to B−. Pin 6 is the RS485 GND and is usually left unconnected; a shared GND connection is suggested when interference is very severe.
- Baud rate: TTL: 2400–460800 bps
- Data bits: 7 / 8
- Stop bits: 1 / 2
- Parity: None / Even / Odd
- Flow control: Software flow control
- RS485 duplex: Half-duplex
- RS485 terminals: Pin 5: B−; pin 6: GND; pin 7: A+
- RS485 bus capacity: Maximum 32 devices
- RS485 cable length: Maximum 1200 m
- RS485 termination: 120 Ω termination for cable lengths over 300 m
- Ethernet interface: 1 × 10/100M RJ45; WAN/LAN switchable; default LAN
- Working modes: Network transparent transmission / HTTP / MQTT / WebSocket
- TCP/UDP connections: Maximum 5 connections; 1400-byte data cache per connection
- Network protocols: IP, TCP, UDP, DHCP, DNS, HTTP server/client, ARP, AutoIP, ICMP, Telnet, NTP, Modbus TCP
- VPN: PPTP, L2TP, L2TP+IPSEC
- APN: Supported
- Modbus: Modbus master; Modbus TCP to Modbus RTU
- Time synchronization: NTP
- Encryption: TLS v1.2; AES 128-bit; DES3, as listed in the technical specifications
- SIM card: Nano SIM, 1.8 V / 3 V
- Antenna connector: SMA cellular antenna connector
- Configuration: Serial AT commands; companion serial or network configuration software
- Registration and heartbeat packets: Can combine ICCID, IMEI, IMSI, software version, and cellular connection status
- Firmware update: UART and network OTA
- Power input: 9–48 VDC @ 1 A
- Power terminals: Pin 1: VCC+; pin 2: GND−
- Average working current: Approximately 300 mA at 9 VDC
- Peak current: 2 A; test conditions are not specified
- Dimensions: 102.03 × 64.95 × 27.50 mm (L × W × H)
- Mounting: C45 guide rail
- Operating temperature: −40 to +70 °C
- Storage conditions: −40 to +85 °C; 5–95% RH, non-condensing
- Indicators: Net (cellular network status); Active (Ethernet connection or UART data); Power; Link (Socket A server connection)
- Factory reset: After power-up, hold Reload for more than 3 seconds and release
- Hardware reset: Reset button
- EMC: Class B, as stated in the manual; no certification claim

## Protocols

- 4G LTE (native): CN: B1 / B3 / B5 / B8 / B38 / B39 / B40 / B41. GL: B1 / B2 / B3 / B4 / B5 / B7 / B8 / B12 / B13 / B18 / B19 / B20 / B25 / B26 / B28 / B38 / B39 / B40 / B41. Non-CA CAT4, as stated in the technical specifications.
- Ethernet (native): One 10/100M RJ45 port. Defaults to LAN and can be configured as WAN.
- RS485 (native): One serial interface. Connect A+ to A+ and B− to B−. Pin 6 is usually left unconnected; a shared GND connection is suggested when interference is very severe.
- TCP (native): TCP connections for serial and Ethernet networking
- UDP (native): UDP connections for serial and Ethernet networking
- HTTP (native): HTTP working mode; HTTP server and client, as listed in the technical specifications
- MQTT (native): MQTT working mode
- WebSocket (native): WebSocket working mode
- NTP (native): Network time support
- DHCP (native): DHCP, as listed in the technical specifications
- DNS (native): DNS, as listed in the technical specifications
- Telnet (native): Telnet, as listed in the technical specifications
- VPN (native): PPTP, L2TP, and L2TP+IPSEC
- Modbus TCP to Modbus RTU (convert): Converts Modbus TCP to Modbus RTU.
- Modbus Master (gateway): Modbus master function, as listed in the product characteristics. Detailed polling behavior is not specified in the available manual.
- TLS (native): TLS v1.2, AES 128-bit, and DES3, as listed in the technical specifications. Application details are not specified in the available manual.

## Features

- One RS485 interface and one 10/100M Ethernet port; 9–48 VDC @ 1 A input
- Ethernet defaults to LAN and can be configured as WAN
- Half-duplex RS485; up to 32 devices and 1200 m cable length; 120 Ω termination over 300 m
- Two 4G band options: Each combining LTE-FDD and LTE-TDD bands
- MIPS microcontroller at 320 MHz; 16 MB Flash / 32 MB SRAM; OpenWRT Linux
- Transparent transmission, HTTP, MQTT, and WebSocket working modes
- Maximum 5 TCP/UDP connections with a 1400-byte cache for each connection
- VPN: PPTP, L2TP, and L2TP+IPSEC; APN support
- Modbus master and Modbus TCP to Modbus RTU conversion; NTP
- Nano SIM supporting 1.8 V and 3 V; SMA cellular antenna connector
- Serial AT commands and companion serial or network configuration software
- Registration and heartbeat packets with device and connection information
- UART and network OTA firmware updates
- TLS v1.2, AES 128-bit, and DES3, as listed in the technical specifications
- 7/8 data bits; 1/2 stop bits; None/Even/Odd parity; software flow control
- C45 guide-rail mounting; −40 to +70 °C operation

## Use cases

- Remote monitoring of serial or Ethernet equipment
- Industrial sensor and controller networking
- Production asset tracking and monitoring
- Data acquisition equipment connectivity
- UPS power management equipment networking
- ATM and telecommunication equipment networking

## FAQ

### Which interfaces does the PG46-DC provide?
It has one RS485 interface and one 10/100M Ethernet port. The Ethernet port defaults to LAN and can be configured as WAN. Connect RS485 A+ to A+ and B− to B−. Pin 6 is the RS485 GND and is usually left unconnected; a shared GND connection is suggested when interference is very severe.
### Which power supply does this model require?
The PG46-DC accepts 9–48 VDC @ 1 A. Use the DC VCC+ and GND− input terminals (pin 1: VCC+; pin 2: GND−).
### Which 4G band options are available?
Each parent model has two 4G options. CN includes B1 / B3 / B5 / B8 / B38 / B39 / B40 / B41. GL includes B1 / B2 / B3 / B4 / B5 / B7 / B8 / B12 / B13 / B18 / B19 / B20 / B25 / B26 / B28 / B38 / B39 / B40 / B41. LTE-FDD and LTE-TDD bands are combined in each selection. Check compatibility with the intended operator before deployment.
### What SIM card does it use?
It uses a Nano SIM card and supports 1.8 V and 3 V SIM operation.
### Does it support Modbus, VPN, and other network modes?
It supports Modbus master and Modbus TCP to Modbus RTU conversion. Working modes include network transparent transmission, HTTP, MQTT, and WebSocket. VPN support includes PPTP, L2TP, and L2TP+IPSEC. APN is supported. A maximum of 5 TCP/UDP connections is supported, each with a 1400-byte cache.
### How is it mounted, and what are its environmental limits?
The 102.03 × 64.95 × 27.50 mm enclosure mounts on a C45 guide rail. Operating temperature is −40 to +70 °C. Storage conditions are −40 to +85 °C and 5–95% RH without condensation.
### Which serial framing and baud settings are documented?
Serial framing supports 7 or 8 data bits, 1 or 2 stop bits, and None, Even, or Odd parity. Software flow control is specified. The baud range is labeled TTL: 2400–460800 bps.
### How is the device configured and updated?
Use serial AT commands or companion configuration software over the serial or network connection. Firmware updates are available through UART and network OTA. After power-up, hold Reload for more than 3 seconds and release to restore factory settings. Reset performs a hardware reset.

## Related

- [4G LTE](https://www.iiotsys.net/technologies/4g-lte)
- [Ethernet](https://www.iiotsys.net/technologies/ethernet)
- [RS-485/RS-232](https://www.iiotsys.net/technologies/rs-485rs-232)
- [Modbus RTU/TCP](https://www.iiotsys.net/technologies/modbus-rtutcp)
- [MQTT](https://www.iiotsys.net/technologies/mqtt)
- [DIN Rail Mount](https://www.iiotsys.net/technologies/din-rail-mount)