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Maximal11V / Maximal33V / Maximal55V / Maximal77V / Maximal75V Access Power Controllers (Fused)
• ACM8 board main fuses are rated @ 10A . Output fuses are rated @ 3 .5A .
• Built-in charger for sealed lead acid or gel type batteries .
- Maximum charge current is 0 .7A for AL400XB2V, AL600XB220 and AL1012XB220 power supply boards .
- Maximum charge current is 3 .6A for AL1024XB2V power supply board .
• Automatic switch over to stand-by battery when AC fails .
• Zero voltage drop when unit switches over to battery backup (AC failure condition) .
• Short circuit and thermal overload protection with auto reset .
• Green AC input and red DC output LED indicators on power supply board(s) .
• AC fail supervision (form “C” contact rated @ 1A/28VDC) .
• Battery fail and battery presence supervision (form “C” contact rated @ 1A/28VDC) .
• Enclosure accommodates up to four (4) 12VDC/12AH batteries .
Enclosure dimensions: 26” x 19” x 6 .25” (660 .4mm x 482 .6mm x 158 .8mm) .
MaximalV Installation Instructions:
Wiring methods shall be in accordance with the National Electrical Code/NFPA 70/ANSI, and with all local
codes and authorities having jurisdiction . Product is intended for indoor use only .
Power Supply Board LED Diagnostics
(pg. 6)
Access Power Controller LED Diagnostics
(pg. 6)
Power Supply Board Terminal Identification
(pg. 7)
Access Power Controller Terminal Identification
(pg. 7)
Power Supply Board Stand-by Battery Specifications
(pg. 8)
Power Supply Board Output Voltage Settings
(pg. 9)
Access Power Controller Typical Application Diagram
(pg. 9)
FACP/Optional Power Supply Hook-up Diagrams
(pg. 17-18)
1 . Mount unit in the desired location . Mark and predrill holes in the wall to line up with the top three key
holes in the enclosure . Install three upper fasteners and screws in the wall with the screw heads protruding .
Place the enclosure’s upper keyholes over the three upper screws, level and secure . Mark the position of the
lower three holes . Remove the enclosure . Drill the lower holes and install the three fasteners . Place the
enclosure’s upper keyholes over the three upper screws . Install the three lower screws and make sure to
tighten all screws (Enclosure Dimensions, pg. 20) .
2 . The power supply is pre-wired to the ground (chassis) . Connect main incoming ground to the provided
earth (safety) ground lug . Connect unswitched AC power (220VAC, 50/60Hz) to the terminals marked
[L, N] on both power supply boards . Use 14 AWG or larger for all power connections .
Keep power-limited wiring separate from non power-limited wiring (220VAC, 50/60Hz Input,
Battery Wires). Minimum 0.25” spacing must be provided.
CAUTION: Do not touch exposed metal parts. Shut branch circuit power before installing or servicing
equipment. There are no user serviceable parts inside. Refer installation and servicing to qualified
service personnel.
3 . Select desired DC output voltage by setting SW1 to the appropriate position on the power supply board
(Maximal11V and Maximal33V), (Fig. 1, pg. 9). Maximal55V power supply is factory set at 12VDC .
Maximal77V power supply is factory set at 24VDC . Maximal75V consists of one (1) power supply board
that is factory set at 12VDC, and one (1) power supply board that is factory set at 24VDC .
4 . Measure the output voltage of the unit before connecting any devices to ensure proper operation .
Improper or high voltage will damage these devices .
5 .
Output options (Fig. 2, pg. 9):
The unit will provide either sixteen (16) switched power outputs, sixteen (16) dry form “C” outputs, or any
combination of both switched power and form “C” outputs .
(a) Fail-Safe Switched Power outputs:
For Fail-Safe operation connect the positive (+) input of the access control devices to the terminal
marked [NC] . Connect the negative (–) input of the access control devices to the terminal marked [COM] .
(b) Fail-Secure Switched Power outputs:
For Fail-Secure operation connect the positive (+) input of the access control devices to the terminal
marked [NO] . Connect the negative (–) input of the access control devices to the terminal marked [COM] .
(c) Form “C” outputs:
When form “C” outputs are desired the corresponding output fuses (1-8) of each ACM8 board
must be removed .
6 .
Auxiliary Power outputs (unswitched):
Connect access control devices that require constant power to terminals marked [C] positive (+) and
[COM] negative (–) .
