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Alarm indications
of supervision
functions
Energizing current
monitoring
Trip circuit
supervision
RS 232 interface
The energizing current monitoring alarm is lo-
cally indicated with a flashing "C.I.F." (Current
Input Fault) message on the display. The "C.I.F."
message is acknowledged by pressing the STEP
and SELECT ∩ push-buttons simultaneously.
The measured phase current value can be called
The trip circuit supervision alarm is locally in-
dicated with a flashing "O.C.F." (Open Circuit
Fault) message on the display. The "O.C.F."
message is acknowledged by pressing the STEP
and SELECT ∩ push-buttons simultaneously.
After acknowledge the display will reset, if the
The 9-pole RS 232 interface on the front panel
is used for setting the control module via a PC.
The entire serial communication of the feeder
terminal goes over the control module SPTO
1D6. This enables protection modules of the
same feeder terminal to be set via the RS 232
interface of the control module.
If a PC is connected to the RS 232 interface the
RS 485 interface on the rear panel of the feeder
terminal is disconnected. The use of the RS 232
interface requires a SPA bus protocol.
RS 232 interface of SPTO 1D6
Signal name
Pin number
9-pin male conn. 9-pin female conn. 25-pin male conn.
Data receive, Rx
Data transmit, Tx
Earth
DSR
DTR, +12V
Pin 4 of the RS 232 interface of the control
module SPTO 1D6 can be used for feeding sup-
ply voltage to an optic modem. An optic mo-
up for display by means of the STEP push-but-
ton, although the monitor is in the alarm state,
but no other display menu items.
The energizing current monitoring function can
be disabled with switch SG1/2.
fault has disappeared. If the fault still exists, the
steady "O.C.F." message remains on until the
fault is cleared. The alarm contact output is au-
tomatically reset when the fault disappears.
The trip circuit supervision function can be disa-
bled with switch SG1/2.
The following serial communication parameters
should be used:
- Number of data bits, 7
- Number of stop bits, 1
- Parity, even
- Baudrate, 9.6 kilobauds as a default
The table below shows the signal names and pin
numbers of the cable to be used between the
RS 232 interface and the devise used for set-
ting.
Setting device
Pin number
2
3
3
2
5
5
6
4
4
-
dem may be necessary between the control
module and the programming device if the pos-
sible potential difference cannot be eliminated.
Pin number
Signal name
2
Data
transmit, Tx
3
Data
receive, Rx
7
Earth
20
DTR
-
-
13
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