What Are "Base Units", "Remote Units" And "Repeaters; Base Unit: Rtr-500Nw / Rtr-500Aw; Remote Unit: Rtr-501 / Rtr-502 / Rtr-503; Repeater: Rtr-500 - T&D RTR-500AW Introductory Manual

What are "Base Units", "Remote Units" and "Repeaters"?

Base Unit: RTR-500NW / RTR-500AW

Base Unit collects via wireless communication current readings and
data measured by and recorded in Remote Units as well as monitors
for warnings.

Remote Unit: RTR-501 / RTR-502 / RTR-503

A Remote Unit is a Data Logger designed to measure and record
temperature and humidity. The wireless communication range between
a Remote Unit and a Base Unit, if unobstructed and direct, is about 150
meters [500 ft].
Remote Unit Base Unit Network
Wireless Communication
Transmission Distance
150m (500ft)

Repeater: RTR-500

If wireless communication cannot successfully be carried out due to
obstacles, or if you wish to extend the wireless communication range,
please add Repeater(s) between Remote Unit(s) and the Base Unit.
12 Introduction