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Operation
indicators
I/O module
ABB Automation
= 1A
I
n
=
I
0,2A
n
f n =
50Hz
U
100V ...120V (
n
U
=
60Hz
100V/110V/120V
n
SPAS 348 C
80...265 V ~ –
18...80 V –
OPERATION INDICATORS
U1
U2
SPCS 4D11
SPCS 4D12
0
0
1
>
1
>
I
I
Start
Start
2
>
2
>
I
I
Start
Start
3
>
3
>
I
I
Trip
Trip
4
>>
4
>>
I
I
Start
Start
5
>>
5
>>
I
I
Trip
Trip
6
>>>
6
>>>
I
I
Start
Start
7
>>>
7
>>>
I
I
Trip
Trip
9
9
CBFP
CBFP
RS 431
Fig. 4. Front panel of feeder protection relay
SPAS 348 C
1. The green LED U
on the system panel is lit
aux
when the power supply unit is operating.
The I/O module of the feeder protection relay
SPAS 348 C is fitted in the rear part of the relay,
in the same direction as the mother PC board.
The module can be withdrawn after undoing
the fixing screws and disconnecting the protec-
tive earth conductor of the cover and the flat
cable connected to the mother PC board.
The I/O module incorporates the output relays
(8 pcs + IRF), the control circuits of the relays,
the electronic circuits for the five external con-
trol inputs and the D connector required for
serial communications. The input and output
signals of the I/O module are linked to the
mother board over a flat cable.
5A ( ) I
2
1A
(
I
)
0
U
)
5
(
U
)
0
U
aux
U3
SPCS 2D26
0
1
>
U
Start
0b
2
>
U
Trip
0b
3
>
I
/
Start
01
>
U
Start
01
4
>
I
/
Trip
01
>
U
Trip
01
5
>
I
/
Start
02
>
U
Start
02
6
>
I
/
Trip
02
>
U
Trip
02
A
CBFP
Ser.No.
2. Measured values, settings and start and trip
data are indicated on the display of the relay
modules. Starting and tripping are indicated
by the red operation code to the left of the
display. The operation codes are explained in
the manuals of the separate protection relay
modules and on the system panel of the
feeder protection relay.
The start indications can be programmed to
remain on even though the stage resets. Nor-
mally, the numbers indicating start are auto-
matically reset, whereas the trip codes have to
be reset by pressing the RESET push-button.
The TRIP indicator at the bottom part of the
front panel can be set to indicate starting and
tripping. The BS1, BS2 and RRES signals
can be configured to reset the trip indicators
automatically. An unreset operation indica-
tor does not affect the operation of the relay
module.
3. Measured values and settings presented on
the display are identified by yellow LEDs on
the front panel.
4. A permanent fault detected by the self-super-
vision system is indicated by the IRF indica-
tor of the concerned relay module. The fault
code appearing on the display when a fault
occurs should be recorded to facilitate main-
tenance and repair.
The operation indicators are described in detail
in the manuals of the individual relay modules.
The output signals SS1...SS4, TS1...TS3 and
TS4 control an output relay with the same
designation. The operation of the stages are not
fixed to a particular output relay, but can be
programmed to the desired output relays. It
should, however, be noted that the output relays
TS1, TS2, TS3 and TS4 can be used for circuit
breaker control. The configuration of the
switchgroups is described in detail in the relay
module manuals.
The operation of the external control inputs is
determined by the setting of the configuration
switchgroups of the relay modules. The control
inputs can be used for blocking one or several
protection stages, for resetting latched output
relays, selecting second settings, etc.
9
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