ABB REF 542plus Technical Reference Manual page 16

REF 542plus REF 542plus
16
Multifunction Protection and Switchbay Control
Unit
Technical Reference Manual
Electronic Keys Sensor
The Electronic Keys Sensor recognizes electronic keys. Two different electronic
keys are provided. One key allows changing the parameters of the protection
functions. The other one is used to change the control modes. The sensor
automatically detects which key has been inserted. The two keys are labeLED
"Protect" and "Control" to distinguish them. When required, a general key to access
both modes can be provided. It is also possible to program an 8-character custom
code in the keys to increase the security levels or for any other specific reason. This
can be done easily with a program available on request.
Object Control
Object Control push buttons allow operating the primary objects.
Menu Navigation
Menu Navigation push buttons allow navigating trough the REF 542plus menu.
Programmable LEDs
8 freely programmable, three-color LEDs are available for indications. There are 4
pages of these LEDs. The assignment of the LED to a specific condition is done
with the Operating Tool.
PC interface
PC interface is the infrared serial (IrDa) interface port to connect the REF 542plus
with a personal computer. By using the appropriate cable and the Operating Tool,
the following actions are possible:
Downloading a configuration into the unit
*
Uploading the current configuration from the unit
*
Uploading the fault recorder
*
Uploading other information (measurements, binary inputs status, binary output
*
status).
Measurements Bars
3 freely programmable bars are provided for a quick inspection of the switchgear
load situation. The three bars are marked M1, M2, and M3. Each bar is composed of
twelve LEDs: ten green and two red. The ten green LEDs are normally dedicated to
display between 0% and 100% of the nominal value of the configured measurement,
each LED corresponding then to 10% of the nominal value. The two red LEDs
indicate an overload condition of 20%. The measurement displayed by the bar is set
with the Operating Tool. M1..M3 reference text can be configured and displayed on
the display is display´s graphical side.
1MRS755859