CRS 40 V2
Installation, operation and service manual M2019/02a
3. DESCRIPTION OF THE EQUIPMENT
3.1. GENERAL DESCRIPTION OF THE EQUIPMENT
CRS 40 is a system for centralized remote reading of radio heat cost allocators (E-30 ITN) and radio
modules for water meters (E-RM 30) operating in the 868 MHz ISM band. Reading network consists of one
or more collecting units A (concentrator) and one central unit B (coordinator) for coordinating meter reading
networks and sending data over the Internet (Ethernet, optional WiFi or GSM) to the remote operator. The
control unit B also serves to adjust the readings (error messages, schedule of readings and possibly base
plan). All elements of the meter reading networks communicate via wireless network. Units of the reading
network are powered from the network of low voltage of 230 V. The readings of heat cost allocators and radio
water meters are performed with daily periodicity. Users log into the system from personal computer or
mobile device via an encrypted connection using a simple web GUI. The automatic transfer of data from the
meter reading network can be done using e-mail or synchronization script. CRS 40 is designed for indoor
environment (installation in residential buildings).
3.1.1. Unit type A (collecting unit, the concentrator)
A unit is designed to collect data from radio transmitting devices (heat cost allocators and radio modules) and
have them forwarded to the control unit B. Unit B (coordinator) further evaluates the data, stores and
transmits possibly over the Internet. Unit A consists of a plastic box, power supply (NZCC1101), radio module
(RFCC1101) and panel antennas attached from the inner side to the cover box.
3.1.2. Unit B (Control Unit Coordinator)
The control unit B manages a group of A units, receives data, evaluates, stores, and eventually sends via the
Internet.
Unit B consists of a box, power supply (adapter), radio module (RFCC1101), panel antenna mounted on the
inner side of the lid and the module box miniature computers (OLIMEX A20).
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Pic. 2: Schematics of unit A
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