MAX TNT General Specifications

This appendix presents the general specifications for the MAX TNT. See Appendix D, "MAX TNT Cabling and Connectors Specifications, " for cabling requirements and connector specifications.

Battery

The MAX TNT shelf controller contains an internal 3V lithium battery. The normal operating life of this battery exceeds five years.

Only trained engineers authorized by Ascend should open the MAX TNT shelf controller for testing, maintenance, installation, or any other purpose. Furthermore, only trained engineers should replace MAX TNT components.

Warning: The battery can explode if incorrectly replaced. Replace the battery only with the same or equivalent type recommended by the manufacturer. Dispose of used batteries according to the manufacturer's instructions.

ATTENTION: IL Y A DANGER D'EXPLOSION S'IL Y A REMPLACEMENT INCORRECT DE LA BATTERIE. REMPLACER UNIQUEMENT AVEC UNE BATTERIE DU MÉME TYPE OU D'UN TYPE RECOMMANDEÉ PAR LE CONSTRUCTEUR. METTRE AU RÉBUT LES BATTERIES USAGÉES CONFORMÉMENT AUX INSTRUCTIONS DU FABRICANT.

Power requirements

Table C-1 lists the MAX TNT source power requirements.

Table C-1. MAX TNT source-power requirements
Element	Value
Voltage	90-240 VAC; -40 to -60 DC
Phase	Single
Frequency	47-63 Hz
Power	200W (nominal)-1200W (maximum)
AC Fuse (5 x 20 mm)	16 Amps
DC Fuse (0.25 x 1.25 inches)	25 Amps
Maximum AC current	16 Amps at 115 VAC. At power up the MAX TNT power supply has an in-rush current of approximately 260 Amps at 240VAC for approximately 0.1 seconds or 130 Amps at 115VAC.
Maximum DC current	25 Amps

Note that the maximum allowable time delay between a power cut off and the supply of a second power source is 20 msec (0.020 seconds).

The MAX TNT configuration profiles are stored in NVRAM. They are not lost when the MAX TNT is turned off.

Note: Use a protected AC power source, or add surge protection between the power source and the MAX TNT.

Environmental requirements

For best results, you should house the MAX TNT in a room with constant temperature and humidity. In general, cooler environments are better. Humidity should be high enough to prevent accumulation of static electricity, but low enough to prevent condensation.

An operating temperature of 32° to 104° Fahrenheit (0° to 40° Celsius) is recommended. Storage temperatures of -40° to 176° Fahrenheit (-71.4° to 80° Celsius) are acceptable.

An operating relative humidity of up to 90% is acceptable.

You can operate the MAX TNT at altitudes of 0 to 14800 ft. (0-4500 m).

The MAX TNT base system (empty with no power supplies) weighs 27.2 lbs (12.34 kg). A fully loaded system with 672 modems (single power supply) weighs 130 lbs (58.97 kg). The MAX TNT has the following dimensions: 14" x 17.4" x 11.5" (35.6 cm x 44.2 cm x 29.2 cm).

Alarm relay operating specifications

The MAX TNT is equipped with an alarm relay whose contacts are brought out on the back panel's alarm relay terminal block. The alarm relay contacts open during loss of power, during hardware failure, or whenever the MAX TNT is being reset, such as during its power-on self test. During normal operation, the alarm relay contacts remain closed.

The gauge wire you use to connect to the MAX TNT alarm relay should be based on the current flow of the circuit that the relay is attached to and the capacity of the alarm relay. Because the MAX TNT alarm relay can carry a maximum of 2 amps, a 18-20 AWG wire is adequate.

The alarm relay has the following characteristics:

Normally Closed
1 Amp at 30 Vdc
0.3 Amp at 110 Vdc
0.3 Amp at 125 VAC

techpubs@eng.ascend.com

Copyright © 1997, Ascend Communications, Inc. All rights reserved.