Toshiba Programmable Controller PROSEC T3 Uživatelský manuál stáhnout pdf (Strana 31)

100

1. System Configuration

1.9

Examining the power

supply capacity

The maximum output current (5 Vdc) of the power supply module

(PS361/PS332) is 7 A. (5.1V at factory setting)

In the standard type expansion configuration, if the power supply

module of the previous unit can supply 5 Vdc to the following units,

no power supply module for the following expansion units is

necessary.

In this case, however, there may be a voltage drop of the 5 Vdc

power caused by the resistance of the expansion cable. The

minimum limit voltage is 4.75 Vdc. It should also be considered.

Basic unit

Exfsansion cable

resistance

= Ro [Q]

Expansion cable

resistance

= Ri [Q]

Expansion cable

resistance

= R2 [Q]

Internal S Vdc current

consumption

^PU+IF+l/0 {A)=lo[A]

Internal 5 Vdc current

consumption

==IF+l/0 (BHi[A]

internal 5 Vdc current

consumption

=IF+l/0 (C)=l2[A]

Internal 5 Vdc current

consumption

=IF+l/0 (D)=l3lA]

Concerning the above figures, the following conditions (1) and (2)

must be satisfied so that the expansion units N0.1 through 3 can be

mounted in the slots using no power supply of their own.

(1) lo+li+l2+l3<7A

(2) 5.1-RoX(li+l2+l3)-RiX{h+l3)-R2Xl3> 4.75V

If either of the above conditions is not satisfied, a power supply

module is needed for the expansion unit.

If a power supply module is mounted on the expansion unit, the

power supply module will supply 5 Vdc to the own unit and to the

following expansion units, disconnecting 5 Vdc line from the

previous unit (OV line is common).

User's manual - Hardware

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