User manual
10
Part C – Applications
Part C – Applications
Generic Connectivity
The E Series has been designed for SCADA and
telemetry applications, and any other applications that
use an ASCII communications protocol, and which
connect physically using the RS232 interface standard
(although converters can be used to adapt other
interfaces such as RS422/485, RS530/V35, G703 etc).
Any protocol that can be displayed using a PC based
terminal program operating via a serial communications
port is suitable for transmission by the E Series radio
modems.
An ASCII protocol is any that consists of message strings
formed from ASCII characters, that being defined as a
10 or 11 bit block including start and stop bits, 7 or 8
data bits and optional parity bit(s). Port set-up dialogue
that includes the expressions “N,8,1”, or E,7,2” or similar
indicate an ASCII protocol.
Most of the dominant telemetry industry suppliers utilise
proprietary ASCII protocols, and also common ‘open
standard” industry protocols such as DNP3, MODBUS,
TCP/IP, and PPP. These are all ASCII based protocols.
Industries and Applications
The E Series products are widely used in point-to-point
and point-to-multipoint (multiple access) applications for
remote interconnection of PLCs, RTUs, dataloggers, and
other data monitoring and control devices - including
specialist utility devices (such as powerline ACRs). In
addition, other applications such as area wide security
and alarm systems, public information systems (traffic
flow and public signage systems) and environmental
monitoring systems.
Application Detail
SCADA Systems
This is where one or more centralised control sites are
used to monitor and control remote field devices over
wide areas. Examples include regional utilities monitoring
and controlling networks over entire shires or a greater
city metropolis. Industry sectors include energy utilities
(gas and electricity distribution), water and sewerage
utilities, catchment and environment groups (rivers,
dams and catchment management authorities).
Telemetry Systems
Dedicated telemetry control systems interconnecting
sequential devices either where cabling is not practical or
distances are considerable.
Examples include:
• Oreconveyororslurrypipelinesystems
• Watersystems(pumpandreservoirinterlinking)
• broadcastindustry(linkingstudioto
transmitter) etc.