PRELIMINARY TECHNICAL DATA

EVAL-ADE7756EB

–5–

REV. PrB 01/01

PRELIMINARYTECHNICALDATA

SETTING UP THE ADE7756 EVALUATION BOARD

SETTING UP THE ADE7756 EVALUATION BOARD

SETTING UP THE ADE7756 EVALUATION BOARD

SETTING UP THE ADE7756 EVALUATION BOARD

SETTING UP THE ADE7756 EVALUATION BOARD

Shown below is a typical set up for the ADE7756 evalua-

tion board. In this example a kWh meter for a 3 wire,

single phase distribution system is shown. For a more

detailed description on how to use a CT as a current

transducer see the Current Sense Inputs section of this docu-

mentation. The line voltage is connected directly to the

evaluation board as shown. Note JP7 should be left open

to ensure that the attenuation network is not bypassed.

Also note the use of two power supplies. The second

power supply is used to power the optical isolation. With

JP14 left open, this will ensure that there is no electrical

connection between the high voltage test circuit and the

PC. The power supplies should have floating voltage

outputs.

+

-

5.000 V

+

-

5.000 V

1.0666 Hz

Load

V1N

110V

JP1 = Open

JP2 = Open

JP3 = Open

JP4 = Open

JP5 = B

JP6 = B

JP7 = Open

JP8 = Open

JP9 = Open

JP10 = Closed

JP11 = Closed

JP12 = B

JP13 = Open

JP14 = Open

JP15 = Closed

JP19 = B

JP20 = Closed

JP21 = Closed

JP25 = Closed

JP9

JP8

R53

C53

R54

V2P

450mV

CT

V1P

SH1B

10A

2.5

Ω

1:2000

25mV

25mV

SK2

AGND

110V

2.5

Ω

SH1A

Load

10A

SK1

255k

Ω

255k

Ω

1k

Ω

BNC2

220V

1k

Ω

33nF

33nF

C54

R57

V2N

V+

V-

SK5

SK4

To PC

Parallel Port

JP7

JP10

110V

Figure 6 - Typical set up for the ADE7756 evaluation board

The evaluation board is connected to the PC parallel port

using the cable supplied. The cable length should not

exceed 6 feets (2 meters) or the serial communication

between the PC and the evaluation board may become

unpredictable and error prone.

When the evaluation board has been powered up and is

connected to the PC, the supplied software can be

launched. The software will automatically start in energy

meter mode. The next section describes the ADE7756

evaluation software in detail and how it can be installed

and uninstalled.

Figure 5 - ADE7756 evaluation board jumper positions

JP20

JP15

JP1

JP25

JP3

JP2

JP4

JP9

JP51

AD7756

JP10

JP7

JP8

JP13

JP11

JP5

JP6

JP19

JP12

JP21

JP14

AB

AB