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Start and opera-
tion indicators
Power supply
and I/O module
f
I
= 1A
5A (
I
)
n = 50Hz
n
60Hz
SPAJ 111 C
80...265V ~ –
U
18...80V –
SPCJ 1C7
REGISTERS
0 0 0 0
1
[
]
I
/
I
%
o
n
2
n
(
>
)
I
o
3
(
> >
)
n
I
SGR
o
4
t
t
>
[
%
]
/
5
> >
[
]
t
/
t
%
0
1
RS 421
Ser.No.
1. Either voltage stage has its own operation
indicator (I
> and I
>>), located in the right
0
0
bottom corner of the front plate of the relay
module. Yellow light indicates that the con-
cerned stage has started and red light that the
stage has operated (tripped).
With the SG2 software switchgroup the start
and trip indicators can be given a latching
function, which means that the LEDs remain
lit, although the signal that caused operation
returns to normal. The indicators are reset
with the RESET push-button. An unreset
indicator does not affect the operation of the
relay.
The combined power supply and I/O module
(U2) is located behind the system front panel of
the protection relay and can be withdrawn after
removal of the system front panel. The power
supply and I/O module incorporates a power
unit, five output relays, the control circuits of
the output relays and the electronic circuitry of
the external control input.
The power unit is transformer connected, that
is, the primary side and the secondary circuits
are galvanically isolated. The primary side is
protected by a slow 1 A fuse F1, placed on the
PC board of the module. When the power
B
I
2
I
IRF
o
5
STEP
6.0
I o
>
[ ]
%
aux
STEP
I
n
1.0
10
0.5
SG1
t
[ ]
>
s
1
0.05
1.0
2
3
4
5
30
6
7
I o
>>
[ ]
8
%
40
I
1
n
0
1
2
5
3
4
RESET
5
6
0.5
7
8
t
[ ]
>>
s
0.05
1.0
I o
>
I o
>>
SPCJ 1C7
2. The yellow LED (I
) on the upper black part
0
of the front plate indicates, when lit, that the
value of the neutral current I
being displayed.
3. The red IRF indicator of the self-supervision
system indicates, when lit, that a permanent
internal relay fault has been detected. The
fault code appearing on the display once a
fault has been detected should be recorded
and notified when service is ordered.
4. The green U
LED on the front panel is lit
aux
when the power supply module operates prop-
erly.
5. The LED indicator below a setting knob
indicates, when lit, that the setting value is
being displayed.
6. The LED of the SG1 switchgroup indicates,
when lit, that the checksum of the switch-
group is being displayed.
The start and operation indicators, the function
of the SG2 software switchgroup and the func-
tions of the LED indicators during setting are
described more detailed in manual for the sen-
sitive earth-fault relay module SPCJ 1C7.
source operates properly, the green U
on the front panel is lit.
The power supply and I/O module is available
in two versions which have different input volt-
age ranges:
- type SPTU 240 S1 U
- type SPTU 48 S1
U
The voltage range of the power supply and I/O
module inserted in the relay is marked on the
system front panel of the relay.
is currently
0
LED
aux
= 80...265 V ac/dc
aux
= 18...80 V dc
aux
7
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