User manual

18

Revision 1.1

2020-09-29

EVAL-M1-IM240-A user manual

iMOTION™ modular application design kit

Schematics and layout

5

Schematics and layout

To meet individual customer requirements and make the EVAL-M1-IM240-A evaluation board a basis for

development or modification, all necessary technical data like schematics, layout and components are

included in this chapter.

5.1

DC bus sensing and MCEWizard configuration

Pin 14 of connector J4 provides access to the DC-link voltage. Three possible feedback cases are associated

with this pin. Figure 11 provides the DC bus sense resistor details.

By default, R22 is not mounted on EVAL-M1-IM240-A. There must be a pull-down resistor mounted on the

corresponding controller board.

Figure 11 DC bus sense resistor on EVAL-M1-IM240-A evaluation board

If a pull down resistor of 4.87 k referred to ground is inserted either on the EVAL-M1-IM240-A evaluation board

or on the control board, the DCBSENSE voltage results in the range of 0 to 3.3 V on the pin reflecting a DC bus

voltage range of 0 to 400 V.

If a pull down resistor of 4.87 kis inserted on both, EVAL-M1-IM240-A evaluation board and on the control

card, the DCBSENSE results scale to 0-1.65 V. No safety issue occurs.

R22

4.87K(DNI)

R21

1.00M

R20

1.00M

DCP

DCBSENSE