505ULAC Installation Instructions
Installing the 505ULAC
23392707-B Page 5 03-2009
Installing the 505ULAC
1) Installation Procedure
The 505ULAC must be installed in accordance with article 760 of the National Electrical Code or
NFPA 72 as well as all applicable local codes.
NOTE: Install the 505ULAC indoors within the protected premises.
A.) Mounting holes are provided on the back surface of enclosure. Firmly mount the 505ULAC to
a solid surface using hardware suitable for the surface.
NOTE: Check national and local codes for installation requirements.
B.) Output voltage selection is set at the factory for 12VDC. If required, change SW1 to 24VDC
as shown in (See Installation Diagram on page 6).
C.) Connect AC power (110VAC, 50/60Hz) to terminals marked: LINE, GROUND (symbol), and
NEUTRAL (See Installation Diagram on page 6).
D.) Connect devices to be powered to terminals marked: DC (+) and DC (-) (See Installation Dia-
gram on page 6).
NOTE: To avoid potential damage, measure output voltage before connecting devices.
E.) For Access Control applications, stand-by batteries are optional.
• When stand-by batteries are not used, a loss of AC will result in the loss of output voltage.
• When stand-by batteries are used, they must be lead acid or gel type.
2) Wiring
• Wiring methods shall be in accordance with the National Electrical Code (ANSI/NFPA70),
local codes, and the authorities having jurisdiction.
• Use metallic conduit for connection of the branch circuit to maintain grounding and bond-
ing of the enclosure.
• Cabling and wire must be UL Listed and/or recognized wire suitable for the application.
• Only use stranded, multi-conductor, color coded wire, without splices.
Use 18AWG or larger for all low power connections (Battery, DC output, AC input).
Use 22AWG or larger for all power limited circuits (Battery Fail, AC Fail).
• Recommended minimum of two (2) spare conductors.
WARNING: Keep power limited wiring separate from non-power limited wiring (110VAC /
60Hz Input, Battery Wires). Minimum 0.25" spacing must be provided.
Table 2: Wire Selection Table
3) Tamper Switch
A tamper switch is required to be installed on the 505ULAC/510ULAC that will monitor the
enclosure for unauthorized access. The tamper switch should be attached to a UL Listed burglar
alarm system or a Listed local siren/annunciator. This will allow for compliance to UL294 Section
32.1.4.
Total Length of One Wire Run
(Feet) Load Current @ 12VDC Load Current @ 24VDC
1/4A 1/2A 3/4A 1A 1/4A 1/2A 3/4A 1A
100 24 18 16 14 24 20 18 18
200 16 14 12 12 20 18 16 14
300 16 12 12 10 18 16 14 12
400 14 12 10 -- 18 14 12 12
500 14 10 10 -- 16 14 12 10
