Siemens MTX-H15 user manual Electrical Description, Power Connector

MTX-H15 UMTS-HSDPA terminal modem http://www.matrix.es

3. ELECTRICAL DESCRIPTION

All electrical connections to the module are protected in compliance with the standard air and contact Electrostatic Discharge (ESD).

The module uses the following industry standard connectors:

•USB port

•RJ12 6-way (power supply connector)

•RJ12 4-way (handset connector)

•SIM card reader

•FME male coaxial jack (antenna connector)

3.1Power Connector

An RJ12 6-way connector, as shown and described below, serves means of supplying and controlling d.c. power to the modem.

The supply voltage, VCC, required by the modem is in the range 6-32V d.c. The power supply has to be a single voltage source of POWER=6V…30V capable of providing a peak during an active transmission. The uplink burst causes strong ripples (drop) on the power lines.

Application of the supply voltage does not switch the modem on. To do so an additional active-high control signal, TURN_ON, must applied for > 0.2s.

A second active-high control signal, TURN_OFF, can be used to switch modem off when applied for 1 - 2 seconds, or can be used to perform hardware reset when applied for > 3.5s.

	PIN:	Signal		Dir		Limits		Description
1		VCC		Input	6 - 32 V DC		Positive power input
	2	Not connected		-
						6 – 32 V		Active high control line used to switch off or
3		TURN_OFF		Input				reset the modem
								VIH > 5V, VIL < 2V
								Power off: t >10ms
								Active high control line used to switch on the
	4	TURN_ON		Input		6 – 32 V		modem
								VIH > 5V, VIL < 2V
								Power on: t > 0.2s
5		VDDLP	I/O					Backup the RTC from an external capacitor or a
								battery (rechargeable or non-chargeable).
	6	GND		Input				Negative power (ground)

Note. VCC and GND are reverse polarity and overvoltage protected.

MTX-H15 User Manual V.2.0Pag. 13 Preliminary. Subject to change without prior notice