page

date

DESCRIPTION: chassis mount dc-dc converter

9 of 10

08/2009

20050

phone

phone 503.612.2300 fax

www.v-infinity.com

fax 503.612.2383

PART NUMBER: VHK200W

15. REMOTE OUTPUT ON/OFF CONTROL

The converter output can be enabled or disabled through the On/Off pin. The control logic is shown in this table. A common control

circuit is shown below.

16. ISOLATION

The input and output of the converter are electrically isolated. If needed, an output terminal can be connected to an input terminal,

resulting in the converter non-isolated.

17. INPUT FILTERING AND EMI INTERFERENCE

The VHK200W converters have input capacitors that control input current ripple and the associated EMI interference. However, they

have not been tested to a formal standard for conducted emissions. Additional filtering may be needed to ensure compliance to an

EMI standard. Refer to FIGURE 10 (next page) for a reference circuit.

Logic Table

Negative logic

Positive logic

SW Closed (V

<1.2 V)

Output on

Output off

SW Open (V

>3.5~75 V or Open Circuit) Output off

Output on

REM

REM

SW

High signal here

disable output

-Vin (pin 4)

REM (pin 2)

REM

-Vin

SW

REM

-Vin

-Vo

+Vo

FIGURE 8. REMOTE ON/OFF CONTROL

FIGURE 9. REMOTE ON/OFF CONTROL

WITH TRANSISTOR SWITCH