905U-G Range Wireless Gateway

Key Features:

ELPRO wireless gateways designed to provide the interface and communication between industrial data-bus devices and field devices Connected via RS-232/RS-485/RJ-45, register-allocated data-bus values are transmitted and received by radio.In addition ELPRO 905U-G series products can multi-hop repeat up to four times in addition it is considered and ideal solution in creating powerful I/O and data bus networks as it support a variety of industrial protocols .
• 865–867 MHz/902–928 MHz 1W, 19.2 kbps radio communications to 20 miles (32 km)
•Multi-hop repeater function provides increased communication distance
•Able to connect similar and dissimilar industrial protocols and vendor devices (incorporating master/slave, slave/slave, and master/master networks)
•Simple to complex networks, high reliability point-to-multipoint communications with forward error correction (FEC), data integrity check (CRC), and data encryption
•Eight configurable digital onborad I/O with I/O expansion via ELPRO 115S I/O expansion range
• AC/DC/battery power options with UPS battery charger
• Module diagnostics including read/write of register I/O, reporting of signal strength indication (RSSI), communications logging, and internal measurement of low/normal and battery supply voltages
•Class I Div 2 hazardous area approval (US/Canada)

Product Details

Transmitter and Receiver


865–867 MHz , 902–928 MHz , 915–928 MHz

Transmit power


Transmission Frequency hopping spread spectrum (FHSS)

Modulation Frequency shift keying

Receiver sensitivity –106 dBm @ 19.2 kbps

Channel spacing 50 x 250 kHz b

Data rate 19.2 kbps

Range (LoS) 20 miles (32 kms) @ 4W ERIP

9.3 miles (15+ km) @ 1W EIRP (other countries)

Antenna connector 1 x female SMA standard polarity

Input and Output

Discrete I/O 8 input voltage-free/NPN, wetting current 0.5 mA 8 ouput FET 30 Vdc/500 mA

Ethernet Port

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

Link activity Link, 100Base-T via LED Serial Port

RS-232 9-pin DB-9 female connector

RS-485 2-pin terminal block, nonisolated f

Data rate (bps) 300, 600, 1200, 2400, 4800, 9600, 14400, 19200

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

Protocols and Configuration

System address Configurable system address

Protocols supported

Model specific

905U-G-MD1 Modbus RTU (master/slave), or Allen Bradley DF1

Up to 4300 I/O points: analog and/or discrete I/O

Modbus, RS-232/RS-485: 300–38400 bps

DF1 (full duplex), RS-232: 300–38400 bps

905U-G-ET1 Ethernet/IP (level 2 I/O server)

Modbus/TCP (class 0, 1: partially class 2 slave)

TCP/IP functions; embedded Web system (dynamic HTTP)

On-board file system for downloadable Web pages via FTP

server; email (SMTP)

2048  bytes input/2048 bytes output: up to 4300 DI/O or 1024

AI/1024 AO10/100 Mbps, RJ-45 connector

905U-G-PR1 Profibus DP slave to EN 50170 standard

416 I/O bytes (up to 1952 DI/1952 DO or up to 122 AI/122 AO)

RS-485 optically isolated with on-board DC/DC converter

Automatic baud rate detection: 9600 bps to 12 Mbps

905U-G-PR2 Profibus DP master to EN 50170 standard

2048 bytes input/2048 bytes output: up to 4300 DI/O or

1024 AI/1024 AO

RS-485 optically isolated with on-board DC/DC converter

Automatic baud rate detection: 9600 bps to 12 Mbps

905U-G-DE1 DeviceNet™ slave

512 bytes input/512 bytes output (up to 4300 DI/O or256 AI/256 AO)

Register size 16 bit, number of remote addresses 500

RS-422 optically isolated (selectable baud rate between 125, 250, 500 kbps)

905U-G-M+1 Modbus+slave

Global database transactions: routing up to six networks

2048 bytes input/2048 bytes output (up to 4300 DI/O or 1024 AI/1024 AO)

RS485 optically isolated: standard baud rate 1 Mbps

User configuration E-series configuration utility

Configurable parameters

Individual I/O mappings, update time, data bus mappings, protocol settings

Security 64-bit encryption on radio and serial

LED Indication and Diagnostics

LED indication Active, OK, serial TX and RX, radio TX and RX, I/O LED status Refer to the product manual for further information.

Reported diagnostics RSSI, comms logging, I/O status, battery voltage

Power Supply

Nominal supply 12–24 Vac/9–30Vdc, over voltage/reverse power protected

Average current draw 905U-G-MD1: 150 mA @ 12V, 90 mA @ 24V, add 5 mA per I/O

905U-G-ET1/PR1/PR2/DE1/M+1: 270 mA @ 12V, 170mA @ 24V, add 5 mA per I/O

Transmit current draw 600 mA @ 13.8 Vdc (1W)

Battery supply 11.5–15.0 Vdc (nattery dupply volts internal I/O value)

Battery charge circuit Suitable for 12 Vdc sealed lead acid batteries Max. charge current 2.0A (5W), 0.9A (500 mW)


EMC FCC Part 15

RF (radio) FCC Part 15.247, RSS 210, AS/NZS4268

Hazardous area CSA Class I, Division 2

Safety EN 60950


Temperature rating

905U-G-MD1: –40 to 140°F (–40 to +60°C)

905U-G-ET1/PR1/PR2/DE1/M+1: –32 to 140°F (0 to +60°C)

Humidity rating

905U-G-MD1: RH noncondensing 0–99%

905U-G-ET1/PR1/PR2/DE1/M+1: RH noncondensing 0–95%