NT1+AME2

The NT1+AME2 Power Management Module is a comprehensive solution for ISDN-NT1 "Plus" (Network Termination Basic Access type Plus) equipment, combining both AC-DC and DC-DC
functions.

The NT1+AME2 Power Management Module (NT1+ PMM) provide the NT1+ equipment with all necessary supply voltages as well as control signals to operate in the different operating modes, typically the Normal Power Mode (NPM) and the Restricted Power Mode (RPM). This specific version has been designed to meet the Alcatel Microelectronics chip set requirements, in agreement with Alcatel Microelectronics.

Connected to the main, Input 1 is the AC input power to the NT1+AME2 PMM, source of the whole necessary power in normal operating mode, namely in NPM. Input 2 is the DC power source when in RPM, therefore to connect to the U-Interface. When the main is available (230 Vac in this version) NT1+AME2 PMM operate in Normal Power Mode, therefore it supply +40V (output 1) to the S-Interface being the output power 4.5 W. This output is current limiter protected via foldback characteristic.

Output 2 delivers 5V (up to 350mW), output 3 delivers -24V (up to 1400 mW), output 4 is - 50V at 1600 mW. Output 5 is the 3.3V for the chip set, the output power of NT1+AME2 is typically 950 mW.

When the main is missing, the module NT1+AME2 remains active but only in Restricted Power Mode (RPM).

The only power source in RPM is the Input 2, the U-Interface (Vi2). Therefore in RPM the following condition apply to output 1: output 1 reverses the voltage (it becomes -40V) and the maximum power Pout is reduced to 420 mW. Mainly depending on input power available from Vi2 "U-interface", the maximum power available at the other outputs (2,3,4,5) is necessarily reduced than in NPM. NT1+AME2's subject of variation as per local application and regulation.

In RPM NT1+AME2 is also possible to set a different "emergency condition" setting HIGH (3.3 V) the auxiliary input 3 (analog emergency input, Vin3). In this case, Pout1 is further limited to 25mW, voltage level being -40V.

The following tables give you details of the various parameters in the 3 different operating modes of NT1+AME2, namely NPM, RPM with Vi3 LOW, RPM with Vi3 HIGH.

NT1+AME2's Availability of the input AC main is also acknowledged by a specific auxiliary output (out 6, "EM signal"), a TTL-compatible signal set HIGH (to logic level "1") when the main is available and LOW when the AC main is missing.

The presence of the "U" is acknowledged by an other auxiliary output (out 7) that is HIGH only when Vin2 > 40V.

The NT1+AME2 PMM provides double insulation (3000 Vrms) between the inputs (1 and 2), and among the input 1 and all the outputs. Basic insulation exists among Out1 and all other outputs. Theother outputs (including the 2 auxiliary outputs) and the input 3, share the same common ground. Double insulation (2000 Vrms) is provided among Input 2 (DC "U") and all outputs.

The NT1+AME2  Power Management Module operate in the range -10 to +70 oC, storage temperatures in the range -40 to +85 oC are allowed.