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PRELIMINARY

PM4301APDA

EXTERNAL CONNECTIONS TO THE PM4301APDA

The PM4301APDA evaluation board has external connectors to connect the various equipment required to evaluate the

SA4301A/SA9105G in an end user application. The external connectors are described in the Table 3. The connection points

correspond to the markings on the evaluation board. Figure 5 illustrates the connection of the PM4301APDA to test equipment.

Table 3: External connectors on the PM4301APDA

Connector

Description

JS1, JS2, JS3

Connection Points for Current Transformers: Connect the current transformers for the three phases to

these connectors. The current transformers should be connected in such a way that a positive current

flows “in” on terminal “P” and “out” on terminal “N”.

JS4

Connection Point for Mains Voltage: The three phase mains voltage must be connected on this

connector. The NEUTRAL line should be connected to terminal “N” and the three LIVE voltages

should be connected to “V1”, “V2” and “V3” for the three phases respectively.

JS5

Connection Point for Power Supply: The power supply to the PM4301APDA should be connected at

this connector. A single 5V supply can be connected between the “+” and “-” terminals or a dual 2.5V

supply can be connected to the “+”, “0” and “-” terminals.

JS6

Connection Point for Pulse Output: This connector is used to access the opto-isolated pulse output.

The emitter and collector output terminals of the opto-coupler are marked “E” and “C” respectively. No

pull-up resistor is present on the PM4301APDA. The pulse output is primarily used for performance

evaluation and calibration of the SA4301A/SA9105G.

JS7

Connection Point of Energy Counter: A stepper motor counter or impulse counter can be connected to

this connection point to register the energy measured by the SA4301A/SA9105G. When an impulse

counter is used the positive and negative terminals of the counter should be connected to the “P” and

“N” terminals respectively.

J14

Tamper Output: This connector contains the signals PH3 (“3”), PH2 (“2”), PH1(“1”) and PH/DIR (“PD”)

and is useful for interfacing the mains fail and direction indicators to a separate system, i.e. a micro-

controller.

J19

pulse output to external circuitry such as an alternative opto-coupler or a micro-controller.

J21

Motor Output: This connector contains the MON (“N”) and MOP (“P”) outputs of the device as well as

interfacing the counter outputs to external energy registration circuitry or a micro-controller.

PM4301APDA

JS1

JS2

JS3

P

N

P

N

P

N

JS4

V1

V2

V3

N

CT1

CT2

CT3

Power

Supply

-

0

+

-2.5V

+2.5V

0V - optional

JS5

J21

0 P N 1

J14

3 2 1 PD

J19

0

1

Counter

JS6

P N

JS7

E C

Pulse

+

-

Load

Load

Load

Neutral

Live 3

Live 2

Live 1

PM4301APDA

JS1

JS2

JS3

P

N

P

N

P

N

JS4

V1

V2

V3

N

CT1

CT2

CT3

Power

Supply

-

0

+

-2.5V

+2.5V

0V - optional

JS5

J21

0 P N 1

J14

3 2 1 PD

J19

0

1

Counter

JS6

P N

JS7

E C

Pulse

+

-

Load

Load

Load

Neutral

Live 3

Live 2

Live 1

Figure 5: Connecting the PM4301APDA to test equipment