Flash Technology
Revision A - 2/13/2020
25
PC 372 - PCB 1 SURGE BOARD
The Surge Board (PCB1) provides protection against line surges and transients on the DC power output to the FH
372.
PC 372 - PCB2 POWER SUPPLY
The power supply (PCB2) located in each PC 372 unit convert input power voltage (100-277 VAC, 50/60 Hz) to the
correct DC operating voltage for the FH 372 Flashhead (~58 VDC).
FH 372 (FLASHHEAD)
The FH 372 receives (~58 VDC) power from the PC 372, and connects to the RS-485 lines to communicate with the
system controller (FTC 270). The rotary switch located on the circuit board in the upper portion of the FH 372
determines the devices RS-485 address and must be set. If there is only one FH 372 then its value would be set to
1. A second FH 372 would be set to 2. Continue this numbering scheme for additional units.
The circuit board in the upper portion of the FH 372 must be addressed appropriately when more than one FH 372
is included in the system. Use the reference table to below to ensure the correct switch position is selected.
Rotary Dial Position
AOL Beacon Address
1
1
2
2
3
3
4
4
5
5
6
6
0, 7-9
Do not use
NOTE: Ensure the termination jumper, located on the circuit board in the upper portion of the FH 372, is closed. If
more than 1 AOL/FH 372 is present onsite, ensure the termination jumper is closed on the last FH372 in the RS-485
communication link.
