DC Power Conditioners
StartGuard | NAV-PAC | Voltage Stabilizing Converters | Noise Filters | Automatic Power Selector

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StartGuard™ Provides Voltage Protection During Engine Start The abrupt DC system voltage drop that accompanies engine starting can cause microprocessor-based voice and data transmitters to “dump” programmed memory. StartGuard solves this problem by providing supplemental voltage to sensitive electronics while the engine is cranked. It contains a sealed rechargeable battery which is switched on-line to electronics when the starter switch or solenoid is engaged. When the engine is running StartGuard automatically goes off-line and the internal battery is recharged by the alternator.

Specifications
Input Voltage: 13.8 - 14.8 VDC nominal, 15.5 VDC max.
Relay Activation Input Voltage: 7-15 VDC
Output: 20 amps max.
Battery: 12 VDC , sealed rechargeable, 5 - 7 year life (typical) 4 amp-hour capacity
             Certified by DOT and IATA for shipment by air Replacement battery P/N: 591-0412-0
Back-up Capacity (Fully Charged): (See matrix below)

Model

Input

Back-Up Capacity

Dimensions

Weight

1 Minute

2 Minutes

Inches

Centimeters

Lbs

Kg.

NS-12-20

13.8-14.8 VDC Nominal 15.5 VDC Max

20 amps

18 amps

H

W

D

H

W

D

5.5

2.5

8.25

4.9

3.5

20.1

12.5

8.9

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NAV-PAC® Mobile communication electronics such as programmable two-way radio and data transceivers, vehicle location systems and other microprocessor-controlled devices require clean and steady DC input power. Their sensitive circuitry is highly vulnerable to voltage drop from engine start, noise and line spikes from alternators and motors, and conducted noise from various other electronic devices. NAV-PAC prevents all of these problems. • Prevents voltage ”drop-out” to   electronics during engine start • Absorbs line "spikes" • Filters out electrical interference • Provides supplemental voltage/battery   back-up for up to 15 min. • Remote monitor panel included.

NAV-PAC has been successfully employed for years by thousands of Fire Trucks and other Emergency Service vehicles nationwide




U.S. PATENT #: 5172292

Model: NP-12
Output:15 amps Max. @ 12 Volt
Back-Up Power:
8 Amps for fifteen (15) minutes
12 Amps for eight (8) minutes
18 Amps for two (2) minutes
Battery: Sealed Rechargeable 4.0 Amp-Hour, 5-7 years typical life, can be replaced. Low-voltage disconnect circuit
protects battery from total discharge. Certified by DOT and IATA for shipment by air.
Noise Filtering: Audio through 200 MHZ
Voltage Spike Protection: Transient energy capability; 100 Joules, 4,000 amps Max (8 x 20 micro seconds)

Size

Inches			Centimeters			Weight
H	W	D	H	W	D	lbs.	Kg.
5.25	6.2	7.4	13.3	15.7	18.8	5.9	2.7

Panel Dimensions: 3.5” W x 2” H (8.9 x 5.1 cm)

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12 & 24 Volt Stabilizing Converters

Feed sensitive electronics with proper voltage regardless of battery condition. These stabilizing converters provide continuous, precisely regulated output over the entire range of a battery's usable voltage. This prevents subjecting loads to fluctuating input voltage which can cause shutdown, diminish performance and possibly damage sensitive circuitry. These converters provide total input/output isolation, virtually eliminating conducted line noise and permitting connection of negative ground loads to positive or floating ground systems, or vice versa. They can also be modified for use as battery chargers, allowing maintenance of a battery at a great distance from the charging source, providing reserve power if the main source fails. The rugged anodized aluminum case is ideal for mobile applications

Application Benefits Include:
• Operate electronics at optimal input voltage, even from nearly drained batteries
• Boost voltage to compensate for voltage drops in long wire runs from batteries
• Eliminate voltage drops during momentary high current drain from batteries, as during engine start
• Eliminate voltage fluctuation from charge sources
• Eliminate voltage overshoot due to sudden removal of high current load



Specifications

Model	Input	Output	Output Amps
	Range	Voltage	Int.	Cont.
12-12-12I	10-16 VDC	13.6 VDC	12	8
12-12-35I	10-16 VDC	13.6 VDC	35	20
48-24-3I	20-56 VDC	24.5 VDC	3	3
48-24-6I	20-56 VDC	24.5 VDC	6	4
48-24-9I	20-56 VDC	24.5 VDC	9	5
48-24-18I	20-56 VDC	24.5 VDC	18	10

Options/Factory Modifications
• Operation as a battery charger (contact factory)
• Parallel/redundant operation (contact factory)
• High vibration mounting kit (see bottom of page)
• Non-standard output voltage (contact factory)

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Noise Filters The interference or electronic “noise” generated by alternators, ignition systems, motors, etc., can render an emergency vehicle’s radio, data transceivers or other electronic equipment virtually useless. This interference takes the form of popping or static on radios or audio gear and garbled images or “hash” on video displays. These specialized filters can be used singly or in combination to attenuate conducted line noise, either at the affected equipment or at the noise source. Models: 150A - Alternator filter, 150 amps PC-10 - Affected equipment filter, 10 amps, PC-25 - Affected equipment filter, 25 amps,

Filter Features:
• Heavy duty aluminum construction
• Operate on 6-48 VDC systems
• Integral mounting flanges for secure installation
• Nickel-plated brass stud connectors on alternator filters accommodate high current cables and terminals
• Color coded wire leads on all other models make in-line installation easy

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Automatic Power Selector The Automatic Power Selector (APS) is a solid state device which enables installation of a seamless, redundant power system for critical electronic loads. It selects the higher voltage of two isolated DC power sources and routes power to the load. Should one source falter or fail, the other will automatically supply the load with no transfer delay, operation continues uninterrupted. Easy installation, two independent power sources are wired to the APS and routed in a single output to the vital load. Rugged, rust-proof anodized aluminum case.

Model APS-70:
Voltage Rating: 6-50 VDC, neg. ground
Peak Load Current: 70 amps
Size: 3.25" x 4.5" x 3.1"
Weight: 2 lbs.

Extreme vibration mounting kit The Extreme Vibration Mounting Kit is available to protect NEWMAR power converters from the extreme stresses of shock and vibration when mounted on high–vibration vehicles. The kit (pictured here) replaces the standard vibration kit provided with the unit and fits into the unit's mounting flange to act as a "super shock absorber" for electronics in high-vibe applications. It is available to fit all NEWMAR units from 2 to 70 lbs. Specify KIT–L for units which weigh 2–15 lbs. and Kit–H for units which weigh 16-70 lbs.