FastNet RTU

Individual Flexibility
The physical connection of these inputs and outputs is via removable screw terminal connectors, making isolation and removal of a FastNet-RTU very simple and quick. The digital outputs are flexible and can be assigned individually or as ‘paired outputs’. The unit also fully supports ‘select before execute’ output function, allowing additional control security. This feature is an option, so that it can be disabled if the user wishes to keep the communication to the units to a minimum, such as when a narrow band communication system is deployed. The digital outputs are fully configurable and support both pulse and toggle options, and the pulse times are individually user configurable. Digital inputs can also be assigned individually or in pairs and have a programmable ‘debounce’ or ‘delay’ time. When assigned as a pair, the ‘on’ and ‘off’ delay times can be configured in order to avoid unwanted state changes. The RTU will not transmit the ‘unknown’ state on an associated switch, such as those generated by a switch or circuit breaker which has a certain amount of ‘travel time’ between opened and closed positions.

Chatter Control to Increase Security
The digital inputs also support ‘chatter control’ which prevents an input from permanently sending changes of state, if connected to faulty equipment which is changing its value constantly. This feature is very useful in preventing one RTU from dominating the communication channel.

Analogue Inputs
The 8 analogue inputs are also fully configurable and have programmable sampling times and support ‘dead-banding’ in order to reduce data traffic without compromising performance. A dip switch allows the user to set the analogue measurement mode between voltage and current.