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The DIST_ALM(1, 2) EXT BAT SW(1, 2), and the EXT AUX MAJ(1, 2) alarm inputs are to be connected as
shown in Figure 12-2. All of these inputs alarm on a closure to VBus(-).
The DIST_ALM(1, 2) alarm inputs are to be used for monitoring US Style CBs and GMT style fuses.
The EXT BAT SW(1, 2), alarm inputs are to be used for monitoring battery disconnect switches or circuit
breakers with a micro switch that closes on manual opening of switch.
The EXT AUX MAJ(1, 2) alarms may be connected to external devices with a micro switch that closes on
an alarmed state. Examples of this might be a Door Open alarm, or a Fan Fail alarm.
Since these devices all alarm on a contact closure, the protectors of the same type may have the
indicating NC terminal connected together and the C terminals connected together and connected as
shown above. This is not the case for DIN style circuit breakers, which must be individually monitored
via different alarm inputs as shown in Figure 12-5.
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DIST_ALM 1 (J1 Pin 6),
DIST_ALM 2 (J1 Pin 13),
EXT BAT SW 1 (J1 Pin 7),
EXT BAT SW 2 (J1 Pin 14),
EXT AUX MAJ 1 (J5 Pin 11) or
EXT AUX MAJ 2 (J5 Pin 12)
Figure 12-2: Typical Alarm Connections
VBUS (+)
STATUS 1 (J1 PIN 10 ) or
STATUS 2 (J3 Pin 3)
STATUS 1 RTN (J1 Pin 9) or
STATUS 2 RTN (J3 Pin 2)
LVD 1_COIL (J1 Pin 12 ) or LVD
2_COIL 2 RNT (J3 Pin 4)
BATT 1_SENCE (J1 Pin 5) or
BATT 2 SENCE (J3 Pin 1)
Figure 12-3: Alarm Connections with Reverse Polarity Protection
Load
VBUS(-)
Load
LVBD
Contactor
VBUS (+)
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