ELPRO 905U-L Wireless I/O Transmitter Unit Quick Start Guide
ELPRO 905U-L Wireless I/O Transmitter Unit v1.7 page 7 of 8
Thank you for selecting the WI-I/O 9-L-T transmitter for your telemetry needs. We trust it will give you many years of
valuable service. To ensure your WI-I/O 9-L-T 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.
Exposure to RF energy is an important safety consideration. The FCC has adopted a safety standard for human
exposure to radio frequency electromagnetic energy emitted by FCC regulated equipment as a result of its actions in
Docket 93-62 and OET Bulletin 65 Edition 97-01.
FCC Notice when used in USA: WI-I/O 9-L-T Module
Part Additional information
15 This device has been tested and found to comply with the limits for a Class B digital device, pursuant to
Part15 of the FCC rules (Code of Federal Regulations 47CFR Part 15). Operation is subject to the condition
that this device does not cause harmful interference.
90 This device has been type accepted for operation by the FCC in accordance with Part90 of the FCC rules
(47CFR Part 90). See the label on the unit for the specific FCC ID and any other certification designations.
Industry Canada: Wireless I/O Module
RSS-119 - This device has been type accepted for operation by Industry Canada in accordance with RSS-119 of the
Industry Canada rules. See the label on the unit for the specific Industry Canada certification number and any other
certification designations.
NOTE: Any changes or modifications not expressly approved by Weidmuller Inc. could void the user’s authority to
operate this equipment.
To operate this equipment legally the user must obtain a radio-operating license from the government agency. This is
done so the government can coordinate radio users in order to minimize interference.
Safety information - FCC Notice
This device complies with Part 15.247 of the FCC Rules. Operation is subject to the following two conditions:
This device may not cause harmful interference; and
This device must accept any interference received, including interference that may cause undesired operation
NOTE: This equipment is suitable for use in Class 1 Division 2 groups A, B and C or non-hazardous locations only.
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 ±1ºover ambient temp
range: -40ºto +70ºC.
Power supply 1 9-30 VDC 1 Amp CSA certified Class 2 power supply. For use in
Class 1 Div 2 explosive areas, the power supply must be approved
for Class 1 Div 2 use.
WARNING: Explosion hazard - do not disconnect while circuit is
live unless area is known to be non-hazardous.
Transmitter 1 1 Watt Frequency Hopping Spread Spectrum (FHSS) Transmitter.
Frequency 902-928 MHz Actual frequency range depends on country.
