AC Input: L, N, G - 3P Terminal block
Safety Cover, snap or hinge is provided
L= Line, N= Neutral, and G = Ground
The G terminal must be connected to Earth Ground.
Optional 3 wire line cord P/N:      HA-LC3SZIP
AC input/Hz/Watts default      85-133vac/47-63Hz/350w
Caution: Never apply 240vac when SPS-20 is set for 120vac this will void warrantee and damage unit.
AC input/Hz/Watts (set 240)      134-250vac/47-63Hz/350w
The AC input default is 120vac.  You may order SPS-20/240 to change the AC default to 240vac, or you can cut the PCB trace marked “CUT 240” on the bottom of the PCB under the input inductor above and toward the inside of the AC input terminal block.
AC LED Indicator (Next to AC Input Terminal Strip)
The AC indicator is a bi-color green and red led.  This led off with AC at the terminals would indicate a blown fuse link.  A blown AC fuse link would indicate catastrophic failure and must me returned to the factory for repair.
AC Status Output Relay: 3P Terminal block
AC fail “C” contacts      2A/120vac
Three position AC fail terminal block marked “NO, C, NC” are shown in the Normal, energized, AC ON condition.
DC OUTPUTS: 4P Terminal block (2 per output)
Output-1 & 2      Nominal 12vdc at 10A each
Output-1 & 2 continuous rating 130F     13.75vdc at 9A each
Output 1 & 2 Maximum power           13.65vdc at 15A each
1 Amp for each output is reserved for battery charging
Load regulation no load to max       .25%Typ
AC Line regulation 85-136vac/170-260vac       .03%Typ
Each Output ripple & noise at full load       300mv pp
Current Overload Short Circuit Protection        Yes
Thermal runaway Protection      Yes
Current Overload and Thermal shutdown will auto-restart without removing load.
Ambient operating temperature range      -30oF to +130oF
Storage Temperature        -60oF to 190oF
Switching Frequency        66KHz
DC LED Indicators (Adjacent to each output pair)      Red
Battery Standby
Two 12” battery cable assemblies that plug from
SPS-20 to battery are provided. Red (+) 12vdc,
Black (–)Neg.
Optional 36” battery cable (1) P/N:      WA-36IBAT
Battery(s), any type of lead acid      12v 4AH-100AH
Battery(s) recharge1 & 2       13.75vdc at 2 Amp max
Battery(s) 1 & 2 PTC self resetting Circuit Breaker      9Amp
Battery)s) 1 & 2 Reverse hookup protection      Yes
In standby mode each battery is limited to 9 Amps of continuous current.  When both outputs are connected in parallel, and standby current will be greater than 9 Amps, you must use 2 batteries connecting one to battery 1 and one to battery 2.  Paralleling (2) battery cables to (1) battery will not double the current.  
Review application note 3, Battery Standby table to calculate battery size.
To estimate the recharge time in hours for depleted battery(s), multiply the AH rating times 1.2. (AH x 1.2).  As an example, 2 12v 10AH batteries would take about 12 hours to re-charge.
Physical
SPS-20 Module Dimensions      7.75”L x 4.17”W x 3.23”H
Height includes 7/16” standoffs
Mounting Holes Center to Center      6.45”W x 3.41”H
SPS-20 module only Weight      2.4lbs.
SPS-20EL (in Large enclosure)      14” x 14” x 4.75”
SPS-20EL Weight with enclosure      11.4lbs
Safety
SPS-20 is UL R/C                               UL603, UL294

SPS-20 meets requirements of      UL1950 3rd & EN60950


Do not make series or parallel connections at the batteries, before circuit breaker protection, just at the output as shown above.  Paralleling jumpers in Fig 2 must be 16" of 18 awg wires to add a little resistance so both outputs can share the load.