Siemens SIPROTEC 7SS523 V3.2 Manual page 82

Configuration
4.5.2 Marshalling Bay Unit Information
4.5.2.1 Allocable Information
Binary inputs
Signal relay
LED indicators
66
The bay unit 7SS523 features 20 binary inputs which are designated BINARY INPUT
1 to BINARY INPUT 20, bay unit 7SS525 features 10 binary inputs.
The binary inputs are marshalled in the address block 6100/BU. It can be selected for
each binary input function whether it is to operate as make circuit or as break circuit.
A - Make Circuit:
The input acts as a make-contact element meaning that the control voltage at the input
terminal activates the allocated function;
R - Break circuit
The input acts as a break-contact element meaning that the control voltage at the input
terminals resets the function, the function is active without control voltage.
Note
Marshalling a logic function to 2 or more binary inputs is not supported (no intercon-
nection). A logic function must be allocated to one binary input.
It is, however, possible to allocate different functions to one binary input.
Table A-24, page 387 and Table A-30, page 391 shows the default assignment of the
binary inputs upon delivery.
Chapter A.10, page 372 gives an overview of the allocable input functions with their
function numbers (FNo.).
The bay unit has a freely allocable signalling output labelled SIGNAL RELAY 1. The
allocation is made under 6201/BU.
Several logic signalling functions (up to 20) can be marshalled to the signal output.
Indications starting with ">" are the direct checkbacks of the binary inputs and are
identical to them. They appear for as long as the corresponding binary input is active.
The default setting of the signal relay is "Bay o of Serv." (FNo. 7640/BU).
Chapter A.10, page 372 contains the complete list of all possible signalling function
with the function numbers (FNo.).
The bay unit 7SS523 features 18 LEDs for optical event indication.
There are 16 LEDs which are freely allocable labelled LED 1 to LED 16.
It is possible to assign several indications to each LED and also one indication to sev-
eral LEDs.
Besides the specification of the logic function it is indicated whether the indication is
in latched mode "m" or in unlatchted mode "nm".
The ex-factory setting of the LEDs can be looked up in Table A-29, page 390.
The default setting of the LEDs 1 to 16 can be displayed upon selection and can also
be modified.
7SS52 V4 Manual
C53000-G1176-C182-1