Sierra Wireless MP215 manual Power Connector Pin-out cable side

MP215 Mobile Modem Installation, Configuration, and User’s Guide

NOTE

The naming convention and signal flow is with respect to the modem not the PC (host) side. This means that TXD on the modem side is RXD on the Host Side and vice versa.

The directions of the arrows indicate signal flow into the pin or signal flow out of the pin. For example, the pin labeled TXD has the signal flowing out of the pin and the arrow pointing away from the pin.

Figure 3-4 Power Connector Pin-out (cable side)

Connector: 1pc

Molex PN 39-01-2040

Alternate: Molex PN 39-01-2045

Pins: 3 pcs	GND (Black)
Molex PN 39-00-0039

Ignition Sense (White)

Battery (Red)

The MP215’s power on/off is controlled by the ignition sense line. When this line is pulled high (5V - 16 V) the modem will power on. When this line is pulled low (less than 2 volts) the modem will power off. The modem shuts down (under software control) when the ignition sense line is pulled low. The modem will gracefully shut down by de-registering. This avoids potential data loss. This switch-off process typically takes several seconds to be completed.

The recommended power supply connection is shown in Figure 3-5: The 12 volt line should be directly connected to the positive (+) terminal of the battery and the Ground line directly to the negative terminal. The Ignition Sense line can be connected to either the electronic ignition switch of the vehicle or an external toggle switch. The current draw of the ignition sense line is less than 1 mA

CAUTION

Failure to implement a controlled switch off as indicated in Figure 3-5(or similar) can cause problems, such as NEI reset when the 12-volt power is removed.

PN0000-00 Revision 1.0 05/11/99 3-3