User Guide

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LED INDICATORS
When operating from a Generator or Alternate source input, additional LEDs
on the logic circuit board indicate:

Low voltage power supplies are operational
 Green LEDs D4 & D6 indicate relays are in shore line position
 Yellow LEDs D5 & D7 indicate relays are in “Generator” position
MOUNTING LOCATION
The ATS 503 is designed for indoor use only.
DO NOT mount in harsh environments; avoid areas where high levels of dust,
dirt, or moisture may occur.
DO NOT mount in the same compartment as batteries or other flammable
materials such as gasoline.
The ATS 503 is designed for horizontal mounting to a deck or floor. Vertical
mounting may be used if the conductor entry into the switch is horizontal to the
floor.
DO NOT mount upside down.
Leave adequate room for routing the shore line, generator and load (breake
r
panel) conductors. Use appropriately rated conductors for field installed wiring.
Install strain relief fittings on all field installed wiring to provide adequate wire
protection and support. Two combo knockouts are provided (1 on each side)
for trade sizes ½” and ¾”. Conductor entry openings at the front of the ATS503
are sized for 1 inch (2) and 1.25 inch (1) trade size strain relief fittings.
SPECIFICATIONS (Subject to change without prior notice)
NORMAL AND ALTERNATE SOURCE RATED:
120/240VAC SINGLE PHASE, 50/60 Hz, 50A TUNGSTEN, 50A BALLAST
OPERATING VOLTAGE RANGE:
EITHER LINE TO NEUTRAL, 108VAC -130VAC
GEN. NEUTRAL CONTACTS RATED 70A W/ JUMPERS INSTALLED
A
UX. CONTACTS RATED 35A, 120VAC SINGLE PHASE, 50/60 Hz.
Maximum generator: 12.6 Kw Command source: Generator
Enclosure: UL Type 1, 16 GA Steel
Dimensions and Weight: ATS 503 with Mounting Flanges
Width: 12-3/8”, Height: 4-1/8”, Depth: 9-7/8” - Weight: 10.0 pounds
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Not ignition protected
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ConfigurationExamplesOnly!–Refertothewiringdiagramfor
wiringinformation.
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