WISCO International (Newmar -Automatic Power Selector)

The APS (Automatic Power Selector) provides a simple, solid state solution to the requirement for redundant DC power for vital electronic equipment while maintaining isolation of the DC power sources.

For vital electronics, use of a back-up, or "redundant," battery system is often recommended, where if one battery fails, the other battery will continue to power the equipment. However, isolation must be maintained, as well.

The independent batteries are wired to separate terminals on the APS and internal diodes maintain total isolation between them. They are combined in a single output which is wired to the load.

Current is automatically drawn from the battery with the higher voltage. Isolation prevents the higher-charged battery from "dumping" into the lower charged or failed battery. Current is drawn "automatically" and continuously from the battery with the higher charge - no switch-over delay if one battery fails.

The APS is rated for loads of up to 70 amps on 12-48 VDC systems. The unit is ruggedly constructed with heavy duty wiring studs and epoxy potted components in an anodized aluminum case. Wiring nuts, washers and mounting screws, provided

Specifications

Model: APS

Input Voltage Range: 6-50 VDC, negative ground

Maximum Load Current: 70 amps

Operating Temperature: -40� to +80� C; derate linearly from 100% @ 50� C to 70 % @ 80� C

Voltage Drop: .7 VDC @ 50 % load; .9 VDC @ full load

Dimensions: 3.25" x 4.5" x 3.1" (8.3 x 11.4 x 7.9 cm)

Weight: 2lbs., .9Kg.