945U-E Wireless High-Speed, Long-Range Ethernet Modem

Key Features:

The ELPRO 945U-E Wireless Ethernet Modem is a robust, license-free wireless transceiver capable of long range and high bandwidth communications. Operating at 900MHz and up to 630mW, the 802.11 standards-based ELPRO 945U-E is optimized for throughputs of up to 54Mbps which provides robust and secure two-way wireless communications in challenging outdoor environments typical of industrial monitoring and control applications.

• 902 – 928MHz Frequency and 250 – 630mW RF Power
• 802.11 DSSS to 54Mbps Data Throughput
• 1.25/2.5/5/10/20MHz Channel Spacing Options
• Transmit and Receive Antenna Diversity
• Access Point/Client and Bridge/Router Configuration
• Serial Client/Server/Multicast Modbus TCP to RTU Gateway
• 10/100baseT IEEE 802.3 Ethernet
• Spanning Tree (Self-Healing) Support
• Deterministic AP to AP Mesh Network Repeatability
• AP to AP Fast Roaming for movable Machinery
• IEEE 802.11i Secure 128bit AES Encryption (WPA2)
• MAC and IP Address Filtering
• Digital I/O Channel Transfer
• Configurable Settings for High Noise Environments
• Over-The-Air Network Diagnostics and Configuration
• VLAN Taggiing Supported for Bridgiing and Routing Modes

Product Details

Transmitter and Receiver


902–928 MHz

915–928 MHz

Transmit power

250 mW (+24 dBm) to 1W (+30 dBm)


Direct sequence spread spectrum (DSSS)


802.11g orthogonal frequency data modulation (OFDM)

Receiver sensitivity

–95 dBm @ 0.25 Mbps, –71 dBm @ 54 Mbps (8% FER)

Channel spacing

9 x 1.25 MHz, 9 x 2.5 MHz, 4 x 5 MHz, 4 x 10 MHz, 2 x 20 MHz

Data rate

1–54 Mbps

0.25–27 Mbps

Auto mode selects fastest rate possible relative to RSSI

Range (LoS) 18 miles (30 km) @ 1W

Antenna connector 2 x female SMA standard polarity

Use CSD-SMA-2500 surge diverter

Input and Output

Discrete I/O Input voltage-free contact

Output FET 30 Vdc 500 mA e

Ethernet Port

Ethernet port 10/100Base-T, RJ-45 connector, IEEE 802.3

Link activity Link, 100BaseT via LED

Serial Port

RS-232 D-B9 female DCE, RTS/CTS/DTR/DCD

RS-485 2-pin terminal block, non-isolated f

Data rate (Bps) 1200, 2400, 4800, 9600, 14400, 19200, 38400, 57600, 76800, 115200, 230400

Serial settings 7/8 data bits, stop/start/parity (configurable)

Protocols and Configuration

System address ESSID; 1to 31-character text string

Protocols supported TCP/IP, UDP, ARP, SNMP, RADIUS/802.1x, DHCP, DNS, PPP,

ICMP, HTTP, FTP, TFTP, TELNET, Modbus and Modbus TCP

User configuration User-configurable parameters via HTTPS embedded Web server

Configurable parameters

Access point/client/bridge/router/VLAN

Point to point, point to multipoint

Wireless distribution system (AP-to-AP repeater)

Modbus TCP/RTU gateway

Serial client/server/multicast

Simultaneous RS-232/RS-485 connection

Embedded Modbus master/slave for I/O transfer


Data encryption, 802.11i with CCMP 128-bit AES

Support for 802.1x Radius server

Secure HTTP protocol

Bandwidth protection

MAC address, whitelist/blacklist

IP filtering, whitelist/blacklist

ARP/GARP filtering, whitelist/blacklist

LED Indication and Diagnostics

LED indication Power/OK, RX, TX/link, link/100bT, RS-232, LAN, RS-485,

Digital I/O status

Reported diagnostics RSSI measurements (dBm), connectivity information/statistics, system log file

Network management Optional network management system


EMC FCC Part 15; EN 301 489–17; AS/NZS CISPR22

RF (radio) EN 300 328; FCC Part 15; RSS 210

Hazardous area g CSA Class I, Division 2; ATEX; IECEx NA IIC

Safety IEC 60950 (RoHS compliant)

UL UL listed


Temperature rating –40°F to +140°F (–40°C to +60°C)

Humidity rating 0–99% RH noncondensing

Power Supply

Nominal supply 9–30 Vdc, under/over voltage protection

Average current draw 300 mA @ 12V (idle), 160 mA @ 24V (idle)

Transmit current draw 500 mA @ 12V (+30 dBm), 250 mA @ 24V (+30 dBm)