Rear Panel MX410/MX412 System Manual4-4 PRELIMINARY 61189500L1-1BAlarm Contacts/AUX InputsThe alarm contacts and auxiliary (AUX) inputs are shown in Figure 4-4.Figure 4-4. Alarm Contacts and AUX InputsThe alarm interfaces connect to the nine Form C type relays on the MX410/MX412 labeledCRIT, MAJOR, and MINOR. Both NC (Normally Closed) and NO (Normally Open) contacts areprovided. Connect the CRIT (Critical), MAJOR, and MINOR alarm leads from the fuse and alarmpanel to the C (Common) and NO or NC wire-wrap terminals on the MX410/MX412 rear panelas required.Auxiliary alarms 1-4 connect to the MX410/MX412 AUX INPUTS labeled 1-9. These pins detectopen and closed relay contacts and are not polarity sensitive. Table 4-1 shows the pin assign-ments for the AUX INPUTS.The alarm severity level can be changed in the Environmental Alarms menu.After the alarm contact and AUX input connections have been made, install the protectivecover over the wire-wrap headers.Table 4-1. AUX Inputs 1-9 Pin ListAUX INPUT Function Default Severity Level1, 2 Alarm 1 Critical3, 4 Alarm 2 Major5, 6 Alarm 3 Minor7, 8 Alarm 4 Alert9 No Connect N/A
