Installing Relays - ABB CoreSense M10 Installation Manual

Installing relays

This is the diagram to install the communication relays between external sensors and the
CoreSense M10. These relays are underneath the terminal box (see Figure 3 on page 13). For more
information, see "Power and relays" on page 91.
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Figure 45 Relays
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Table 5
Relay behavior
1 if the instrument is functional (blue LED off)
Relay 1
(Maintenance)
0 if there is a problem with the CoreSense M10 (blue LED lit)
1 if no gas alarm is active (green LED it)
Relay 2
(System)
0 if an alarm is active (warning or alarm). (green LED off)
1 if one of the elements analyzed by CoreSense M10 is in warning (yellow LED lit)
Relay 3
(Warning)
0 if no warning on analyses (yellow LED off)
1 if one of the elements analyzed by CoreSense M10 is in alarm(red LED lit)
Relay 4
(Alarm)
0 if no alarm on analyses (red LED off)
Examples of combined relay behavior
1-1-0-0 System OK
0-0-0-0 Internal problems, and gas concentration predictions not possible
1-0-1-0
If a gas concentration is above a threshold but below an alarm
1-0-0-1 In case of excessive gas concentrations
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Installation Guide