1 The Leader in Industrial Data Communication Solutions Training: SRM Advanced Topics

2 SRM Block Diagram

3 SRM Operational Details  Proprietary US military battlefield technology  Designed to be highly secure  RF Packets  Masters  Create them  Fill with data as necessary  Transmit them regularly  Repeaters relay them  Slaves fill them with data  RF packet Structure  Header  Data fields  Viewed at packet level, it is a full duplex RF link

4 Repeaters  Repeaters are Store-and-Forward  Adding the first repeater reduces the entire radio network throughput by 50%. Adding more repeaters does not further reduce throughput. Use back to back radios to eliminate throughput reduction.  Repeaters can be configured to simultaneously operate as slaves  P2P networks can include up to two repeaters  P2MP networks can have unlimited repeaters

5 P2P Operation  P2P Operation  RF Data handshaking  User data cannot be lost in RF link  Throughput  Radio Identification by Callbook only

6 P2MP Operation  RF Data handshaking  User data can be lost in RF link  Throughput  Radio Identification by  Callbook  Network ID  Network ID and Subnet ID

7 CallBook – Multiple Paths  A radio can be permitted to communicate with any one of several masters or repeaters.  There is no guaranteed order of connection.  Use with caution.

8 Callbook, Network ID & Subnet ID

9 Frequency Key Mapping

10 Ethernet Networks: NIC Settings  Network Interface Card (NIC) Settings  IP Address  Subnet Mask  Gateway  Normally the SRM Series Products do not use these settings however LincView diagnostics using UDP will require an IP address set in the master. In current versions of the SRM Ethernet radios it be pinged.

11 Ethernet Networks: Packet Types  Many packet types can be present on an ethernet network including:  TCP/IP point to point  Typical MSG instructions  Broadcast - DHCP and BootP requests  Unigram Data Packets (UDP)  AB Logix engine PLCs use UDP for  Producer/Consumer communications  Remote I/O over Ethernet  Multi-cast - Streamed data such as video

12 Ethernet Networks: Data Filtering  A function between the user’s equipment and the RF transmitter to permit only necessary data traffic into the RF network.  Filter may not block all unwanted data  Filter is switch selectable

13 SRM Security  Reference WhitepaperWhitepaper  Security Extends beyond RF Technology  Limit Access to radio equipment  Secure and change radio configuration  Proprietary technology designed for security and reliability  Slaves cannot “listen in” to other slaves

14 The Leader in Industrial Data Communication Solutions