DOCA0128EN-02

Wiring - Power Supply

Overview

The LTMR controller supply voltage can be:

  • 24 Vdc, or

  • 100…240 Vac

The following table presents LTMR controller and LTME expansion module association rules:

 

LTMR•••BD (VDC)

LTMR•••FM (VAC)

LTME••BD (VDC)

X

X

LTME••FM (VAC)

X

X Association allowed

Association not allowed

DC Power Supply

A dedicated 24 Vdc power supply is necessary to supply:

  • One or several LTMR controllers including the logic inputs of the LTMR controller(s).

  • The logic inputs of the LTME expansion module(s).

An additional specific 24 Vdc power supply is necessary to supply:

  • The LTMR controller logic outputs.

  • Other devices.

The LTMR controller DC power supply must have the following characteristics:

  • AC/DC converter.

  • Galvanic isolation input AC / output DC: 4 kVac minimum at 50 Hz.

  • Input voltage: 240 Vac (+15% / -20%).

  • Output voltage: 24 Vdc (+/-10%).

The following Schneider Electric ABL8RPS24••• power supplies are recommended:

Reference Number

Input Voltage

Output Voltage/Current

Maximum Number of LTMR Controllers Supplied

ABL8RPS24100

200…500 Vac

24 Vdc / 10 A

24

ABL8RPS24050

200…500 Vac

24 Vdc / 5 A

12

ABL8RPS24030

200…500 Vac

24 Vdc / 3 A

8

AC Power Supply

A dedicated AC/AC power supply or UPS is necessary to supply:

  • One or several LTMR controllers including the logic inputs of the LTMR controller(s).

  • The logic inputs of the LTME expansion module(s).

An additional specific AC or DC power supply is necessary to supply:

  • The LTMR controller logic outputs.

  • Other devices.

The LTMR controller AC power supply or UPS must have the following characteristics:

  • Isolation transformer

  • Output voltage: 115 or 230 Vac (+15% / -20%)

    • 115 Vac output voltage is recommended.

    • With 230 Vac output voltage, an additional LTM9F external filter may be necessary.

  • Power according to the number of LTMR controllers (several AC supplies are recommended).

  • UPS is mandatory if voltage is unstable and does not follow EN 50160.

Power Supply Daisy Chaining

When the same power supply (AC or DC) is used to supply several LTMR controllers, it is recommended to close the loop:

  • To avoid power off,

  • To reduce voltage drop due to long cables.

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