Instruction manual
P84662J Page 9 of 28
2.3 WIRING
WARNING: MAKE SURE THAT THE TOTAL RMS CURRENT REQUIRED BY ALL APPLIANCES
THAT ARE CONNECTED TO THE PS-24-8MC’s NOTIFICATION APPLIANCE CIRCUITS DOES NOT
EXCEED THE PS-24-8MC’s RATED CAPACITY (8 AMPS MAXIMUM) OR THE CURRENT RATINGS OF
ANY INDIVIDUAL NOTIFICATION APPLIANCE CIRCUIT (3 AMPS MAXIMUM). OVERLOADING THE
PS-24-8MC COULD RESULT IN LOSS OF POWER AND FAILURE TO ALERT OCCUPANTS DURING
AN EMERGENCY, WHICH COULD RESULT IN PROPERTY DAMAGE AND SERIOUS INJURY OR
DEATH TO YOU AND/OR OTHERS.
Review the Operation Section (3.0) in order to select the proper hook-up and use of the POWERPATH. Set
switches and wire the POWERPATH as follows: Terminal and switch locations are shown in Figure 1.
A. Set output DIP Switch(s) to follow corresponding input (IN1, IN2) and desired output mode. See Table
3 DIP Switch Selection and DIP Switch Settings Section (3.2).
B. Set DIP Switch SW7 position 1 & 2 to select Class “A” or Class “B” operation (Off for Class "B", On for
Class "A").
Note: When the PS-24-8MC is used with the optional PS-4CA module, the main board Class switches
must be set to Class “B”.
C. Select the mode of operation for the Auxiliary output (JP2) to either managed power (MP) or constant
power (CP). In the MP mode of operation the Auxiliary output is disconnected upon AC loss or an
alarm condition. The power is reconnected 30 seconds after AC power returns or the alarm condition
is over. The power is not disconnected when in the CP mode of operation.
D. Select the delay, before AC loss trouble will be reported to the common trouble terminals (JP1) to
either SHORT DLY or LONG DLY. LONG DLY is 170 minutes and SHORT DLY is 30 seconds.
E. If using the optional PS-4CA module install it now.
F. Dress the battery wires down to the back of the enclosure, observing ¼” separation of power limited
wire V.S. non-power limited wiring. See Figure 3.
G. Connect notification appliances to desired outputs OUT1 – OUT4 See Operation Section (3.0).
• The POWERPATH has in-out wiring terminals that accept two #18 to #12 American Wire Gauge
(AWG) wires at each screw terminal. Strip leads 3/8 inches and connect to screw terminals.
Maximum line impedance is 39 ohms or 3.4 volt drop, whichever is more.
• Separate all in-out wire runs on supervised circuits to insure integrity of circuit supervision. The
polarity shown in the wiring diagrams and on the circuit boards is for operation of the appliances.
The polarity is reversed by the FACP during supervision.
• Total load for the PS-24-8MC NAC circuits shall not exceed 8.0 Amps.
• Total load of any NAC output circuit shall not exceed 3.0 Amps.
• In Class “B” mode of operation terminate unused outputs with a 2.2K Ohm EOLR.
• In Class “A” mode of operation connect unused outputs to there respective returns.
• When using the optional PS-4CA module connect unused outputs to there respective returns.
H. Connect the NAC circuit(s) from the FACP to the desired input(s), IN1 and IN2. Connect EOLR to
RET1 and RET2. The value is determined by FACP manufacture.
I. Connect desired auxiliary equipment to the auxiliary output terminals +AUX-.
J. Connect AC loss trouble relay as desired.
K. Connect the common trouble relay as desired.
L. Connect AC source. The AC source shall be connected to a dedicated, non-switch power source.
The AC must first be wired into the buildings main electrical power. The conduit entry can be either
from the top or left hand side using the knock-outs. See Figure 3. Connect Earth Ground First.
M. Connect backup batteries. Observe correct polarity, use two of the same connected in series. Use
either a 7AH or a 12AH battery depending on circuit loading,
BATTERY CALCULATION SHEET is
provided on Sheet 27.
N. Install battery cover between both battery wires and Power Limited Wiring. See Figure 3.
O. Press Auxiliary Power Reset, SW6 to ensure that Auxiliary Power is present.
P. Close door and lock.