RM-4E Components
9
Power In There are two ways to power an RM-4E:
Method A - from the Power In connector using an external power
supply, which also charges the battery through the BATTERY
connector.
Method B - from the RS 485 connector using the apC or iSTAR power
supply.
NOTE: Do not use both power connection methods at the same time.
NOTE A UL Listed power-limited access control or burglar alarm power supply,
capable of four hours standby, must be used when the unit is powered
from a source other than the apC or iSTAR.
FIGURE 6. RM-4E Power Wiring - Method A
Method A - via Power In
Connect +12 or +24 VDC to Pin 2 of the Power IN connector.
Connect the ground side of the supply to either Pin 1, 3, or 4. Because
the three grounds are all tied together, you can connect the negative
side of the supply to any of the three pins.
Do not use +24 VDC unless all devices on the bus are RM-4Es.
RM-4s, I/8s, R/8s and MRMs must be powered with +12 VDC.
NOTE The battery charger only works if you power through the Power IN
connector.
+12/24 VDC
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