Hardware Installation—Installing the IFC-1010/2020
55
Table 9 provides the MPS-24A or MPS-24AE main power supply load
capacitance. Figure 36 illustrates connections for primary and secondary
power to the MPS-24A or MPS-24AE, as well as terminal and harness
connections for the control panel.
With the breaker at the main power distribution panel turned off, remove
the plastic insulating cover from Terminal Block TB1 on the MPS-24A
and connect the system primary power source. Connect the service ground
to TB1 Terminal 2 and ground the power supply assembly to the cabinet
with a chassis ground cable (Part Number 71073) to TB1 Terminal 3.
Connect the primary Neutral line to TB1 Terminal 4 and the primary Hot
line (120 VAC for the MPS-24A or 220/240 VAC for the MPS-24AE) to
TB1 Terminal 6. Do not route AC wiring in the same conduit with circuits
in this control panel. After completion of these connections, reinstall the
plastic insulating cover over the terminal strip. Leave the main power
breaker off until installation of the entire system is complete.
N20
Secondary power is required to support the system during loss of primary
power. The batteries may reside in the control panel cabinet, or in a
separate BB-55 cabinet. When using a 24 VDC regulated source other than
batteries, this source must be of sufficient capacity and be listed for this
purpose.
Note: A remote cabinet may be required to house NiCad batteries due to
battery size.
The MPS-24A or MPS-24AE automatically detects earth faults in the
system. To disable earth fault detection cut Resistor R27
(refer to Figure 34).
Up to one ampere for four wire smoke detector scan be drawn from
TB3 Terminals 1 (+) and 2 (-). Power is removed from these terminals
during system reset. This 24 VDC regulated source is power-limited but
must be supervised via an end-of-line power supervision relay (refer to
Figure 67 or Figure 68 and Figure 69).
Up to 3 amperes of regulated current for powering notification appliance
scan be drawn from TB3 Terminals 3 (+) and 4 (-). Power is not removed
from these terminals during system reset. If additional four wire smoke
detector power is required, this circuit can be converted to a two ampere
resettable circuit by cutting JP5 on the MPS-24A or MPS-24AE (refer to
Figure 36). This 24 VDC power is power-limited but must be supervised
via an end-of-line power supervision relay.
Connecting the
Main Power
Supply
Connecting
Primary AC
Power
Connecting the
Secondary 24V
Power Source
Earth Fault
Detection
24 VDC
Four Wire
Smoke Detector
Power
24 VDC
Notification
Appliance Power
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