Anet-1E1SM Gateway
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Anet-1E1SM Gateway
Anet-1E1SM Gateway

● 4G, Ethernet, WiFi Gateway

● Embedded Linux platform

● 1 Ethernet port (RJ45 10/100M) + 1 optically isolated RS485 (ANet-1E1SM) or 2 RS485 (ANet-1E2SM)

● Downlink protocols: MODBUS-RTU / MODBUS-TCP

● Uplink protocols: MODBUS-TCP (master/slave) and MQTT

● Industrial-grade design


  • ANet-1E2SM+4GHW+manual.pdf ANet-1E2SM+4GHW+manual.pdf
  • Description
Smart IoT Gateway · 4G LTE
ANet-1E2SM-4GHW
Intelligent Communication Gateway
Also available: ANet-1E1SM-4GHW — same gateway with single RS485 port

An embedded-Linux, IoT-ready data gateway that collects energy data from water, electricity, gas, oil, cooling and heating meters — then uploads it to your platform via 4G LTE, Ethernet or WiFi with Modbus-TCP and MQTT.

ANet-1E1SM / ANet-1E2SM-4GHW Smart IoT Gateway
4G LTE
GLOBAL BANDS · 150/50 Mbps
1-2 RS485
1E1SM · 1 PORT / 1E2SM · 2 PORTS
MQTT
MODBUS-TCP · CLOUD-READY
EDGE
EDGE COMPUTING BUILT-IN
Product Overview
One Gateway, Every Meter Connected

The ANet-1E1SM / ANet-1E2SM series is a general-purpose intelligent communication gateway independently developed by Acrel, based on an embedded Linux platform and specifically designed for IoT applications. It meets the data acquisition needs of sub-metering for water, electricity, gas, oil, cooling and heating energy consumption.

ANet-1E1SM features one optically isolated RS485 port; ANet-1E2SM features two. Both share the same embedded Linux platform, 4G LTE / WiFi uplink and edge computing engine. The gateway delivers high performance, low power consumption, real-time data acquisition and convenient device management, widely deployed in building energy systems, power monitoring, demand-side management, comprehensive energy platforms and the ubiquitous power IoT.

4G & WiFi Wireless Communication
Global 4G LTE bands with optional WiFi 6 — connect where wired networks are not available.
Flexible & Convenient Management
Configurable template libraries, one-click instrument point generation and batch operations.
Stable & Secure Software
4-level alarms, resumable transmission, XML data format and AES encryption.
GATEWAY COMMUNICATION CHAIN
Energy Meters
AMC · ACR · ADW · PZ · 3rd-party
DOWNLINK — MODBUS RTU / DL/T645 / CJT188
ANet-1E1SM / ANet-1E2SM-4GHW
Smart IoT Gateway · Edge Computing
UPLINK — MODBUS TCP / MQTT · 4G / RJ45 / WiFi
EMS / DCIM / Cloud Platform
Acrel EMS · 3rd-party SCADA · IoT Cloud
Key Features
Engineered for Reliable Data Collection
01
4G Global Communication
LTE-FDD/TDD, UMTS and GSM global bands with external SMA antenna. 150 Mbps downlink / 50 Mbps uplink.
02
1 or 2 RS485 + Ethernet
ANet-1E1SM: 1 optically-isolated RS485. ANet-1E2SM: 2 RS485 (2400-115200 baud) plus 1 RJ45 10/100M adaptive port.
03
Edge Computing
Virtual data summation, secondary data calculation and logic control — process data locally before upload.
04
Secure Data Transmission
Resumable transmission, XML data format and AES encryption protect data integrity from meter to platform.
05
Flexible Configuration
Reusable template libraries, one-click generation of instrument points and batch operations for fast commissioning.
06
Type-C Debugging
Type-C debugging port and embedded web configuration for easy local and remote maintenance.
07
Industrial EMC
Full unit passed EMC testing. All communication terminals passed 2kV power frequency withstand voltage test.
08
Data Storage & Export
Supports SFTP and CSV data export with up to 3 years of local historical data retention.
09
Wide Environment Range
Operating -20°C to +55°C, up to 2500m altitude, DIN 35mm rail installation — built for the cabinet.
Model Configuration
Decoding the ANet Model
ANet - 1E1SM / 1E2SM - 4GHW
SERIES
ANet
Smart Gateway Series
MAIN MODEL
1E1SM / 1E2SM
1 Ethernet · 1/2 Serial · DIN rail
AUXILIARY
4GHW
4G LTE Global Module
— No auxiliary function
4GHW 4G communication, global module (SMA magnetic antenna, 1.5m cable standard, 3m optional)
LR LoRa downlink wireless (410MHz-525MHz, magnetic antenna 2m cable)
K Switch input/output: 6DI (dry contact) + 4DO (dry contact)
WF WiFi 6, IEEE 802.11 a/b/g/n/ac/ax, dual-band 2.4GHz/5GHz
Technical Specifications
ANet-1E1SM / 1E2SM-4GHW Datasheet
POWER & PROCESSOR
Supply VoltageDC 9-36V (paired 100-240Vac to 12Vdc adapter)
ProcessorARM9 @ 804MHz
Memory128M RAM + 256M NAND Flash
Power Consumption≤ 10W · 50Hz (45-65Hz)
INTERFACES
Ethernet1 RJ45, 10/100M adaptive
RS4851× optically isolated (1E1SM) / 2× optically isolated (1E2SM), baud 2400-115200
4G LTELTE-FDD 150Mbps DL / 50Mbps UL · LTE-TDD 130/30
WiFi (WF option)WiFi 6, 802.11 a/b/g/n/ac/ax, dual-band 2.4/5GHz
LoRa (LR option)410MHz-525MHz downlink wireless
DI/DO (K option)6DI (dry contact) / 4DO (dry contact)
DebuggingType-C debugging port
4G LTE GLOBAL BANDS (4GHW)
LTE-FDDB1/2/3/4/5/7/8/12/13/18/19/20/25/26/28
LTE-TDDB38/39/40/41
UMTSB1/2/4/5/6/8/19
GSMB2/3/5/8
ENVIRONMENT & SAFETY
Operating Temperature-20°C to +55°C
Storage Temperature-25°C to +70°C
Relative Humidity≤ 95% (@25°C) · Altitude ≤ 2500m
Withstand Voltage2kV power-communication terminals, 1 min
Insulation Resistance>100MΩ (input/output to chassis)
EMC (GB/T 17626)ESD L4 · RF L3 · Fast Transient L4 · Surge L4
Mounting & Size35mm DIN rail · 72 × 90 × 77mm · Cat II · Pollution 2
Protocol Support
Open Protocols, Any Platform
DEVICE SIDE (DOWNLINK)
• Modbus RTU / TCP
• DL/T645-97/07
• DL/T698
• CJT188-2004
MASTER SIDE (UPLINK)
• Modbus TCP (Master/Slave)
• MQTT protocol
• Multi-platform upload with
different protocols
EDGE & COMPATIBILITY
• Edge computing (virtual sum,
secondary calc, logic control)
• All Acrel meters (ACR, PZ, AMC,
APM, ADW, AEW, DTSD)
• 3rd-party device integration
Applications
Where the Gateway Adds Value
01
Building Energy Management
Sub-metering aggregation for water, electricity, gas, cooling and heating in commercial buildings.
02
Power Monitoring & Demand-side
Real-time power monitoring and demand-side management for industrial facilities and utilities.
03
Distributed PV Plants
Collecting inverter, meter and weather-station data with 4G uplink for remote PV fleet monitoring.
04
Data Center Sub-metering
PDU and rack-level energy data upload to DCIM via Modbus-TCP and MQTT.
05
Comprehensive Energy Platform
Feeding grid comprehensive energy platforms and ubiquitous power IoT scenarios.
06
Retrofit & Brownfield Sites
DIN-rail gateway that fits existing cabinets — add remote monitoring without rewiring the whole site.
Wiring Overview
Simple Terminal Connection
RS485
A1 / B1
1st channel RS485
RS485
A2 / B2
2nd channel RS485 (1E2SM)
POWER
DC+ / DC-
9-36Vdc power input
NETWORK
LAN / SIM
RJ45 Ethernet · 4G SIM tray

Recommended cables: RS485 — RVSP 2×1.5mm² · Ethernet — Cat6 · Power — 2-core 22AWG paired with 100-240Vac to 12Vdc adapter (included in each pack).

Need a Gateway for Your Project?

Get datasheets, quotations and configuration support for the ANet-1E1SM / 1E2SM series. Our specialist responds within 24 hours.

Aliness Sun
North & South America Sales Manager
WhatsApp: +86 150 0036 0686
Company: Acrel Co., Ltd.
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