Chapter 19 - Digital I/O and PSL Configuration
CONFIGURING DIGITAL INPUTS AND OUTPUTS
Configuration of the digital inputs and outputs in this product is very flexible. You can use a combination of
settings and programmable logic to customise them to your application. You can access some of the settings
using the keypad on the front panel, but you will need a computer running the settings application software to fully
interrogate and configure the properties of the digital inputs and outputs.
The settings application software includes an application called the PSL Editor (Programmable Scheme Logic
Editor). The PSL Editor lets you allocate inputs and outputs according to your specific application. It also allows you
to apply attributes to some of the signals such as a drop-off delay for an output contact.
In this product, digital inputs and outputs that are configurable are:
Optically isolated digital inputs (opto-inputs). These can be used to monitor the status of associated plant.
Output relays. These can be used for purposes such as initiating the tripping of circuit breakers, providing
alarm signals, etc..
Programmable LEDs. The number and colour of the programmable LEDs varies according to the particular
product being applied.
Function keys and associated LED indications. These are not provided on all products, but where they are,
each function key has an associated tri-colour LED.
IEC 61850 GOOSE inputs and outputs. These are only provided on products that have been specified for
connection to an IEC61850 system, and the details of the GOOSE are presented in the documentation on
InterMiCOM inputs and outputs. These are not used by all products. If your product is equipped with an
InterMiCOM feature, you will find details of allocation and configuration in the chapter dedicated to the