915U-2 Wireless Mesh Networking I/O & Gateway

Key Features:

The ELPRO 915U-2 Wireless Mesh Networking I/O and Gateway is a multiple I/O node that extends communications to sensors and actuators in local, remote, or difficult to reach locations. Designed with a long range, license-free 900MHz wireless transceiver, the ELPRO 915U-2 is capable of providing IP-based mesh networking across sprawling industrial environments typical of industrial applications.

• 902–928 MHz frequency hopping spread spectrum (FHSS) up to 1W RF Power
• 869 MHz wideband up to 500 mW for Europe
• Self‑healing IP-based wireless mesh networking
• Multi-hop repeater and gateway functionality
• Gather-scatter and block mapping
• Serial client/server/multicast Modbus TCP to RTU gateway
• Configurable digital, pulse, and analog I/O to 14‑bit resolution
• 10/100Base‑T IEEE 802.3 Ethernet
• Secure 128-bit AES encryption
• Modbus RTU and TCP support
• Over-the-air network diagnostics and configuration
• Optional support for logging of register variables (see 915U-LOG data sheet)

Product Details

Transmitter and Receiver

Frequency

902–928 MHz , 869.525 MHz, 869.875 MHz

Transmit power

1 mW (+0 dBm) to 1W (+30 dBm)

1 mW (+0 dBm) to 500 mW (+27 dBm)

Transmission Frequency hopping spread spectrum (FHSS)

Single frequency

Modulation Frequency shift keying (FSK)

Receiver sensitivity

–109 dBm @ 19.2 kbps (3% FER)

–109 dBm @ 14.4 kbps (3% FER)

Channel spacing

50 x 250 kHz b d, single 250 kHz

Data rate 19.2–115.2 kbps a b, 14.4–76.8 kbps

Range (LoS)

20 miles (32 km) @ 1W

6 miles (10 km) @ 500 mW

Antenna connector 1 x female SMA standard polarity

Input and Output

Discrete input

8 digital I/O (1–4 configurable as PI or PO)

On-state voltage: <2.1 Vdc

Wetting current: 5 mA

Max. I/P pulse rate–DI 1/2: 50 kHz, DI 3/4: 1 kHz

Max. I/P pulse width–DI 1/2: 10 μs, PI 3/4: 0.2 ms

Discrete output

8 digital I/O (1–4 configurable as PI or PO)

On-state voltage–DO max.: 30 Vdc

Wetting current–DO max.: 200 mA

Max O/P pulse rate–PO max. rate: 1 kHz

Analog inputs

4 AI (2 differential, 2 single ended)

Current range: 0–24 mA

Current resolution: 14 bits

Accuracy (current): 0.1%

Voltage input range: AI 1/2: 0–25V, AI 3/4: 0–5V

Voltage resolution: 14 bits

Accuracy (voltage): 0.1%

Analog output 2 AO (sourcing)

Current range: 0–24 mA

Current resolution: 13 bits

Accuracy (current): 0.1%

Ethernet Port

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

Link activity    Link, 100Base-T via LED

Serial Port

RS-232 EIA-562 (R-45 connector)

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, 1 to 31-character text string

Protocols supported TCP/IP, UDP, HTTP, FTP, TFTP, TELNET, Modbus, Modbus TCP

User configuration All user-configurable parameters via HTTPS

Configurable parameters

Unit details, I/O mappings and parameters, radio settings (for more information, refer to the user manual)

Modbus TCP/ RTU gateway

Embedded Modbus master/slave for I/O transfer

Security

Data encryption, 128-bit AES, secure HTTP protocol

LED Indication and Diagnostics

LED indication Power/OK, TX/RX, RS-232, RS-485, digital I/O, analog I/O status

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

Network management Optional network management system

LED Indication and Diagnostics

LED indication Power/OK, TX/RX, RS-232, RS-485, digital I/O, analog I/O status

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

Network management Optional network management system

Compliance

EMC FCC Part 15; EN 301 489; AS 3548

RF (radio) FCC Part 15.247; EN 300 220; AS 4268.2; RFS29 NZ

Hazardous area UL/CSA Class I, Division 2; ATEX; IECEx Na IIC

Safety IEC 60950 (RoHS compliant)

UL UL listed

General

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

Humidity rating 0–99% RH noncondensing

Power Supply

Nominal supply 10.8–30 Vdc, under/over voltage protection

Average current draw 220 mA @ 12V (idle), 110 mA @ 24V (idle)

Transmit current draw 500 mA @ 12V (1W), 250 mA @ 24V (1W)

SOLUTIONS

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