Specifications
Alto 818 Installation and Operation
2-10 P/N 66109074001 Rev. D
2.2 POWER MODULES
A number of power modules are available for use with the Alto 818. The SE 3708CU and the
SE 3718SU are UL Listed supplies which can power the ACU. The SE 3018S, SE 3018-2 and
the SE 3708C are not UL Listed and may not be installed in a security system which must meet
UL 294 standards. Power for S-Net devices may be supplied by the Alarm-Saf or Power Inserter
power supply; the Alarm-Saf is UL Listed, the Power Inserter is not.
2.2.1 SE 3708CU / SE 3718SU POWER MODULES
WITH BACKUP BATTERIES
The SE 3708CU and the SE 3718SU power modules are installed in an enclosure along with two
12-volt backup batteries (see Figures 2-5 or 2.6). These supplies can provide AC power to
operate the ACU and DC power for lock control. For technical details on the SE 3708CU power
module, see the SE 3708C Uninterruptible Power Module Technical Manual, WSE part number
66108566001. For technical details on the SE 3718SU Power Module, see the SE 3718S
Uninterruptible Power Module Technical Manual, WSE part number 66109090001.
The SE 3708CU uses 12-volt, sealed, gel cell backup batteries connected in parallel with
systems using 12-volt locks, or in series with systems using 24-volt batteries. Recommended
backup batteries are listed in Table 2-3. Equivalent batteries of the same size and with a
minimum capacity of 6.4 amp-hours may be used. These batteries measure 6.0 inches (152 cm)
long by 3.7 inches (94 cm) high by 2. 6 inches (63 cm) wide.
The SE 3718SU uses 24-volt, gel cell backup batteries. Lock voltage may be selected to either
12 or 24 volts. Recommended backup batteries are listed in Table 2-3. Equivalent batteries of
the same size and with a minimum capacity of 6.4 amp-hours may be used. These batteries
measure 6.0 inches (15.2 cm) by 3.7 inches (9.4 cm) by 2.6 inches (6.3 cm) wide.
Table 2-3: Recommended Power Module Backup Batteries
Manu facture r Description Part Number UL F ile N um be r
Yuasa 12 V, 7.0 am
p
-hour,
g
el cell NP7-12 MH 16464
Power Sonic 12 V, 7.0 am
p
-hour,
g
el cell PS-1270 MH 13723
Power Sonic 12 V, 6.5 am
p
-hour,
g
el cell PS-1265 MH 13723
Pan aso nic 12 V, 6.4 am
p
-hour,
g
el cell WSE 42100189000 MH 14328