User Manual

SGD-SB2025NT-TUM, Part 2
Jan 12 Page 49
SOLAR COMMISSIONING
Figure 42. Isolated Input Options.
Each input is assigned to either a ‘Monitor’ mode, which provides a visual indication of the status of
an input, or an ‘Auto’ mode, which pre-defines the duty of each input as shown overleaf in
Table 1
.
The ‘(Inv)’ option of each setting inverts the “ON” state of the input; i.e. in non-inverted mode the
indicator and any associated function is “ON” when the input is taken low, in the inverted mode the
indicator and function is “ON” when the input is taken high or left open circuit.
To change the mode of an input, carry out the following:
1. On the ‘NI Engineering’ window, select the ‘Eng’ button (IN).
2. On the ‘Signalling’ page, select the ‘Isolated Inputs – Mode’ tab to access the ‘Mode’ page.
3. On the ‘Mode’ page, for the input in question, using the drop-down list, select the mode
required.
Note.
On the Isolated Inputs Status page, there is provision for the user to enter a text label
of choice against each input as a reminder of the role assigned to the input.
4. On the ‘Signalling’ page, select the ‘Isolated Inputs – Status’ tab to access the ‘Status’ page.
5. On the ‘Status’ page, for the input in question, click in the text box and enter or amend the
text as required.
6. On the ‘NI Engineering’ window, select the ‘Apply’ button.
More than one item may be changed at a time but the action must be completed by selecting
‘Apply’. At this point, any new setting or text will turn
Blue
until full confirmation is received from
the opposing end of the system. For text labels this will take several minutes as text is given
lowest priority in the supervisory process.
Table 1. Isolated I/P Functions.
Input Central NI Station NI
#1 Channel Tx Key (PTT) Rx squelch open (COR)
#2 Controlled T/T No function assigned
#3 No function assigned SB2000 Alarm state
The use of Input #1 at a Station NI to indicate receiver squelch status is not mandatory as the
‘Signalling In’ facility can be setup to provide this function (see
Section 5.2.2.1
).