Flash Technology VANGUARD FTS 370d, Reference Manual

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FTS 370d/w/r Revision 10 – 1/09/2015 39
System Wiring Diagram Notes (D1 & D2)
1. Input power conductor size depends on the service voltage, the distance from the source,
and number of SC 370 units connected. Assume 340 VA per SC 370. Also see Note 5.
2. Use only Flash Technology PN 4370000 to connect the flashhead to the SC 370. Splicing
of the cable is not permissible on D1 and D2 systems. A 5’ service loop should be placed at
the base of the tower near the controller and just below the flashhead. The cable should be
secured to the structure using the 2/3/4 method. See “Securing The Cable” (this section).
3. Dry contact alarm output contact rating 5 ampere, 250 VAC. Contacts shown in normal
operating state with no alarms or errors.
4. User's alarm circuit not shown.
5. It is recommended that the input power is connected to L1 & L2 of terminal block TB1 on
the SC 370 programmed as System 1. It is also recommended to daisy chain the input power
connection from System 1 TB1 L1 and L2 to System 2 TB1 input and to continue the input
power distribution in this manner between remaining units.
Note: The L1 Fused and L2 Fused terminals of TB1 should not be used to supply power to
other units.
6. Mount the enclosures vertically.
7. The SC 370 enclosure must be grounded to the site grounding system using 2 AWG wire
minimum.
8.
Install one or more lightning rods near the uppermost flashhead(s).
The copper lightning
rod(s) should extend a minimum of 36” above the height of the flashhead and a minimum of
18” horizontally away from the flashhead.
9. The FH 370(s) must be grounded to tower steel using 8 AWG wire minimum. It is
recommended that all exposed ground connections are coated with a corrosion inhibitor (NO-
OX or equivalent).
10. The photodiode must be mounted vertically, outdoors facing an unobstructed polar sky.
It must not view direct or reflected artificial light. The photodiode may be mounted at the
top end of a vertical length of rigid conduit or to the optional Antenna Mounting Bracket kit
(P/N 1905355). The photodiode cable may be spliced to provide additional length. The
recommended minimum wire gauge is 16 AWG if additional length is necessary.
11. Mount the GPS antenna outdoors with an unobstructed view of the sky. Antenna
Mounting Bracket kit (P/N 1905355) is recommended for installation of the GPS antenna.