Led Indicators - Siemens 7UT51 Instruction Manual

7UT51 v3
A lp han um eric D isp la y
O n/O ff S w itch
K eypa d
N am eplate
In clu des m ode l nu m b er
Figure 14.2 7UT513 Front Panel
14.1.5

LED Indicators

The 7UT512 relay has eight LEDs, six of which can be
configured by the user. The 7UT513 relay has 16
LEDs, 14 of which can be configured by the user.
Each configurable LED can indicate up to ten events
of conditions chosen from a long list. See Section 13.4
on page 128 of this manual for more information.
The LEDs that cannot be changed for either relay
model are as follows:
Power – Lights up GREEN to indicate the relay
powered on and is working properly. Normally, this
indicator will remain on. It will be off if the On/Off
switch is in the "Off" position or if power to the relay is
interrupted. It also will be off if any of the internal
failure monitoring functions detect a device failure.
Blocked – Lights up RED to indicate that the relay has
detected an internal problem and has blocked itself
from operation. This LED also will light briefly during
initial power-up and after the protected system setting,
system frequency setting, or input/output function
assignments are changed and saved.
PRIM-2330C
7 U T
Nu merica l Differential P rotection
Transformer / Gen erator/ M otor
On
Pass Direct
Off
7 8 9
word Addr
Target Target
Event 4 5 6
Reset Reset
1 2 3
0 + -
Back ∞
F Enter
Space
Yes No
Operation Using the Front Panel Controls
Power
7
Blocked
8
1 9
2 10
3 11
4 12
5 13
6 14
Data Port
The remaining LEDs (1 through 6 for the 7UT512 or 1
through 14 for the 7UT513) will light up RED to
indicate that the annunciation assigned to this LED
indicator during the configuration process has
occurred. These indicators will remain on until reset,
and the relay will retain this data even if power is lost.
Whether or not the indications are retained in the
nonvolatile memory is a configuration option. If the
indications are not retained, they will be reset when
the fault condition is removed. If they are retained,
they can be reset locally by the Target Reset key on
the front panel, through a serial port, through a binary
input. If another fault occurs before the LEDs are
reset, the relay will automatically reset the LEDs and
light the LEDs appropriate for the new fault.
To reset the LEDs, press Target Reset on the front
panel, or go to Address 8201 RESET LED? and
press Yes.
14
P ow e r LE D
In dicate s re lay is in se rvice
(G reen )
B lo cked LE D
In dicate s re lay pro tection
fu nction is blo cked
(R ed)
P rog ram m ab le L E D s (R ed )
R S -232
C om m un icatio ns
In terfa ce
139