Power Interface

Overview

The Power Input Interface is a single connector that provides power to the digital board.

Electrical Connections

Pins 1 (V_BATT) and 2 (GND) provide power to the OEM board. The allowable input range is 12–38 V, with a nominal expected voltage of 24 V. Refer to the digital board connector locations figure for the connector's physical location.

Power Input Interface schematic connections.

Power Input Interface Electrical Pinout

Pin Number	I/O	Pin Name	Notes
1	P	V_BATT	Board power input, 12–38 V, nominal 24 V
2	P	GND	Board ground

Hardware Components

The Power Input Interface uses a Molex Mini-Fit Jr. connector, P/N 0039013022, or equivalent. The recommended contacts are Molex P/N 0039000074, suitable for 18–24 AWG wire. They can be crimped with Molex hand tool 0638190901; pre-crimped leads may also be used.

Power Input Interface User-Side Molex Connector.

Power Input Interface Components and Part Numbers

Part Number	Manufacturer	Description
0039013022	Molex	Mini-Fit Jr. 2-position connector receptacle, 4.2 mm pitch
0039000074	Molex	Mini-Fit Jr. 18–24 AWG gold-plated sockets
0638190901	Molex	Mini-Fit Jr. hand crimp tool
2153431215	Molex	Pre-crimped Mini-Fit Jr. lead, 450 mm length

Mating Cable Notes

• 18 AWG wire is preferred to reduce power losses during modem operation.
• Attach or detach the interface only while power is disconnected from the OEM modem to avoid electrical damage.