Specifications

ELPRO 105U-L-T Wireless I/O Transmitter Unit Quick Start Guide
ELPRO 105U-L-T Wireless I/O Transmitter Unit Version 1.8 page 7 of 8
Safety information
Thank you for selecting the 105U-L transmitter for your telemetry needs. We trust it will give you many years of
valuable service. To ensure your 105U-L transmitter enjoys a long life, double-check ALL your connections with the
user’s manual before powering on the unit.
WARNING: Incorrect termination of supply wires may cause internal damage and will void warranty.
Unit specifications
Input/output Number Additional information
Digital inputs
2
Dry-contact digital inputs slow-pulsed at 10Hz.
All inputs are suitable for voltage free contacts (e.g. mechanical
switches) or NPN transistor devices (e.g. electronic proximity switches).
NOTE: PNP transistor device inputs are NOT suitable.
Analog inputs
1
0-20mA differential input; 16-bit resolution, 0.1% accuracy, 10 ohm input
impedance.
Thermocouple
inputs
1
J, K or T type thermocouple with on-board cold-junction compensation.
Cold junction compensation accuracy ±1º over ambient temp range: -40º
to +70ºC.
Power supply
1
9-30 VDC 1 Amp CSA certified Class 2 power supply. For use in Class I
Div 2 explosive areas, the power supply must be approved for Class I
Div 2 use.
WARNING: Explosion hazard - do not disconnect while circuit is live
unless area is known to be non-hazardous.
Transmitter
1
5 mW or 500 mW DFSK Fixed Frequency Transmitter.
Frequency
868.525 MHz
869.875MHz
500 mW - 5km out of plant, 1km obstructed environment.
5 mW – 1km out of plant. 300m obstructed environment