User's Manual

MCPA TBS SYSTEM USER MANUAL

2.3 POWER SUPPLY REQUIREMENT

The power cable selection should rely on the distance between rectifier and Backplane. At the

power terminal of Backplane for MCPA and Cooling Fans, a 27+/-1Vdc is needed.

CAUTION

z The AC or DC power source must be connected to dedicated lightning

arrestor to avoid damage to TBS system in case of lightning.

z All modules of TBS system should be well grounded.

Normally each MCPA needs 35amps (maximal). The voltage and current requirement for each

power terminal (refer to section 2.3.6.6) is as following table:

Table 2: Voltage and Current Requirement

Power Terminal

at Backplane

DC Input

Power (Vdc)

Maximal

Current (A)

Remark

MCPA 1 26-28Vdc 41 6amps (maximal) for System Controller,

Passive Module and cooling fans.

MCPA 2 26-28Vdc 35

MCPA 3 26-28Vdc 35

MCPA 4 26-28Vdc 35

2.3.1 TEMPERATURE AND HUMIDITY REQUIREMENT

MCPA TBS system can operate at -5 to +50 degrees Celsius and 5%-95% relative humidity

ambient. The HVAC requirement is as following:

Table 3: Total HVAC Requirement for MCPA TBS

Subrack

Quantity

MCPA

Quantity

Total HVAC Requirement For Subrack

Assembly and MCPA Module (BTU/hr)

1 3,915

2 7,194

3 10,474

4 13753

5 17,669

6 20,948

7 24,228

8 27,508

9 31,422

10 34,702

11 37,981

12 41,261