Migration Master Station; Operation - 4RF Aprisa SR+ User Manual

Migration Master Station

The Aprisa SR+ Migration Master Station (MMS) provides migration from legacy radio networks to Aprisa SR+
SCADA radio networks utilizing existing frequencies and antenna infrastructure.
The Aprisa SR+ Migration Master Station is comprised of a standard Aprisa SR+ Protected Station and a
Aprisa SR+ Migration Switch, a fully redundant RF switch. The MMS is available in the 928 MHz, 896 MHz,
400 MHz and 220 MHz frequency band options and 2E2S (two Ethernet and two Serial) data port option.
Example Part Numbers:
A complete Aprisa SR+ Migration Master Station requires two parts to be ordered.
The Aprisa SR+ Protected Station (48 VDC):
Part Number
APSQ-R896-SSC-HD-22-ENAB
The Aprisa SR+ Migration Switch compatible with the Protected Station:
Part Number
APSB-XMSW-900

Operation

The Aprisa SR+ inspects the serial SCADA traffic packets to determine the destination address. Each packet
is mapped to either the legacy or the Aprisa SR+ network based on SCADA address learning, utilizing the
address / destination ID field of the SCADA protocol. Initially all SCADA protocol addresses will be assumed
to exist on the legacy network. If a transaction to a remote address times out or there is no response the
packet can be resent on the Aprisa SR+ network. If an address is detected as working on the Aprisa SR+
network, it is added to the address map for the Aprisa SR+ network.
This allows you to progressively switch out legacy remote radios without any configuration of the MMS
address map or host controller. The address map can also be manual defined as an option. When migration
of all remotes is complete, the legacy master and the migration switch component of the MMS can be
removed resulting in a standard Aprisa SR+ master station installation.
Part Description
4RF SR+, PS, 896-902 MHz, SSC, Half Dup, 2E2S, EN, 48VDC
Part Description
4RF SR+ Acc, Migration Switch, 896-960 MHz
Aprisa SR+ User Manual 1.5.3
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