ABB Unitrol 1000-PM40 - Potential free Output Alarm; Alarm Relay Functionality; Start up Sequence, LED Display; Startup LED Sequence

Document number Lang. Rev. ind. Page
ABB Switzerland Ltd
3BHS200200 E80
en A 13
2.3.6 Potential free Output Alarm
Signal Description
Relay turned off Normal operation
Relay turned on Alarm
The relay can indicate the alarm only, if the unit is powered. Otherwise the
relay is turned off!
2.3.7 Start up Sequence, LED Display
When the supply voltage Upwr powers the unit shows the following sequence with LED’s:
Time Action
Normal operation
LED Power ON lights up only
LED Power ON and that LED which had led to the last interruption lights up:
- Interruption CAN Bus connection -> LED Excitation ON lights up
- Overtemperature -> LED Overtemperature lights up
- ICL recovery fault -> LED Excitation ON and LED Overtemperature lights up
LED Power ON lights up only
All LED’s except the LED alarm light up
[s]
0
1
2
3
4
5
Normal operation
(No alarm signal possible)
Normal operation: see display LED’s, section 2.3.5