2 Chapter 1: Introduction
DUG-10009-01 RTM II FlexNet User Guide
1.1 RTM II Overview
The RTM II uses the radio network to enable communications between IEDs with supported protocols
and Sensus AutomationControl™. When it receives data from the RTM II, AutomationControl displays
the data immediately. Alternatively, the customer can use Sensus Automation’s DNP SCADA-Xchange™
software, which uses a secure TCP/IP connection to transfer the DNP3 data directly to the utility's
SCADA system.
Most newer generation Remote Termina
l Units (RTUs) and IEDs use the standard DNP3 communication
protocol to communicate with utility SCADA systems. The RTM II also provides a Modbus interface to the
many IEDs and RTUs that support this protocol.
The RTM II connects to an IED such as a recloser, voltag
e regulator, or capacitor bank controller through
an RS-232 serial port or an optional RS-485 serial port. The RTM II can either be installed as a
communications board within the IED enclosure or externally in its own weatherproof enclosure.
Pass Through Port
IED Port
PC Port
IED Terminal DC Power
Radio Transmit
IED Comm
Radio Coverage
RTM Status
Figure 1-2: RTM II Bottom View
Figure 1-3: RTM II Status LEDs
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