Document UT-MT-0872-EN
Page 11 of 31
Edition 27/09/2018
LIMS INSTRUCTION MANUAL
Three different LED strips are possibly mounted on the signs, according to the overall sign lengths.
The correspondence between sign length and LED strip length are showed in Table 4:
Sign length A
[mm]
Strip LEDs
Quantity
Length [mm]
1094
1
960
1354
1
1200
1574
2
720
2054
2
960
2294
3
720
2534
2
1200
2994
3
960
Table 4: Sign-strip length combination
3.1.8
Monitoring Option
The electronic card of the signs with Monitoring Option has an electromechanical relay with a
normally closed contact. This contact is assembled in series with the feeding circuit of the
electronic card.
When one or more LED strips fail, the normally closed contact opens, turning off the electronic
board and the sign lights off.
A manual intervention is needed to restore the relay contact in closed position and then to permit
the sign to switch on again.
Note: If the relay contact is restored after a LED strip failure and no
replacement is performed, the monitoring functionality is
automatically disabled. The monitoring will not be reactivated by the
system until the failed LED strips will be replaced with good strips.
The Figure 8 shows the positions of the relay contact.
Figure 8: Electromechanical relay
