Siemens 7SR157 Argus, Manual

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7SR157 Technical Manual
Chapter 7 - Page 14 of 14 © 2016 Siemens Protection Devices Limited
4.2 Binary Outputs
Binary Outputs (BO) are mapped to output functions in the OUTPUT MATRIX menu. All are Trip rated and each
can be defined as Self or Hand-Reset. Self-reset contacts are applicable to most protection applications. Hand-
reset contacts are used where the output must remain active until the user expressly clears it e.g. in a control
scheme where the output must remain active until some external feature has correctly processed it.
4.3 LED
S
LEDs are mapped to functions in the OUTPUT MATRIX menu. They can be used to display the status of virtually
all of the different internal functions of the synchronising relay e.g. Line/Bus status, CS In Progress, System Split
etc.
Each LED can be defined as Self or Hand-reset and this is set in the LED CONFIG menu. Hand-reset LEDs are
used where the user is required to expressly acknowledge the change in status. Self-reset LEDs are used to
display features which routinely change state, such as Circuit-Breaker open or close.
The status of Hand-reset LEDs is retained in capacitor-backed memory in the event of supply loss.
Each LED can be assigned as red, yellow or green in colour. There are two methods for doing this: -
1) In the LED Matrix tab: to assign the LED as a red colour select a box on the red row. To assign the
LED as a green colour select a box on the green row. To assign the LED as a yellow colour, select
boxes on both the red and green rows.
NB: If there are no boxes selected the LED will not illuminate.
Figure 4-2 LED configuration via the LED Matrix tab
2) In the settings tab, OUTPUT CONFIG\LED CONFIG menu: to assign the required LED as a
particular colour, either red or green, type the LED number in the appropriate row. To assign the
required LED as a yellow colour, type the LED number in both red and green rows.
NB: If a LED number is not assigned that particular LED will not illuminate.
Figure 4-3 LED configuration via the Settings \ OUTPUT CONFIG \ LED CONFIG menu