905U-1,2,3,4 Wireless Multi-I/O Simple to deploy, long‑range, reliable wireless I/O connectivity Description The ELPRO 905U Wireless Multi-I/O is a node that extends communications to sensors and actuators in local, remote, or difficult-to-reach locations. Designed with a long‑range, license-free or licensed wireless transceiver, the ELPRO 905U module provides a simple‑to‑deploy solution to transfer process I/O signals reliably over long distances or within an industrial plant. Capable of transferring analog or discrete I/O points in point‑to‑point or point–to–multi-point situations. Each 905U product can also provide repeater functionality to extend the distance of the network and capture remote I/O points. The I/O is scalable using 115S serial expansion units at each 905U unit. Link I/O inputs to single or multiple I/O outputs (peer to peer) Reliable point–to–multi-point two-way communications combining exception reporting, self-checking and data encryption Multi-hop repeater function provides increased communication distance Multiple I/O channels for monitoring and controlling field devices with set-point, pulse count, and rate available. Additional internal I/O points provided for health monitoring Communication failure notification and diagnostics, including radio path measurement, communications logging, and verification of I/O values Built-in low voltage AC/DC/battery power options, UPS battery charger and solar regulator User-friendly configuration software Flow meter monitoring Storage tank monitoring Pipeline cathodic protection Pump stop-start Weather station reporting High‑level alarms

Technical Data EL-905U-1234 Effective October 2018 SPECIFICATION DESCRIPTION Transmitter and Receiver Frequency865-867 MHz ©, 902-928 MHz ®, 915-928 MHz ® Transmit power 1W Transmission Frequency hopping spread spectrum (FHSS) Modulation Frequency shift keying Receiver sensitivity -106 dBm @ 19.2 kbps Data rate 19.2 kbps Range (LoS) 20 miles (32 km) @ 4W ERIP © 9.3 miles (15 km) @ 1W EIRP (other countries) Antenna connector 1 x female SMA standard polarity Input and Output Digital input Voltage free/NPN, wetting current 0.5 mA 905U-2: 1 FET output 30 Vdc/500 mA 905U-3: 8...

Technical Data EL-905U-1234 Effective October 2018 Accessories PRODUCT CODE DESCRIPTION Antennas - 900 MHz DG900-1 Whip antenna, SMA male, angle bracket, -2 dBi gain, 3' ( 1m) coaxial cable WH900-SMA Whip antenna, SMA male, -2 dBi gain CFD890EL Dipole antenna, SMA male, mounting bracket, 2 dBi gain, 16' (5m) coaxial cable SG900EL Collinear antenna, N-type female, 5 dBi gain SG900-6 Collinear antenna, N-type female, 8 dBi gain YU6-900 Yagi antenna, N-type female, 9 dBi gain YU16-900 Yagi antenna, N-type female, 15 dBi gain Cables CC3/10/20-SMA Coaxial cable kit, 9.8' (3m)/32'...