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PRELIMINARY

PM4104APDA

EXTERNAL CONNECTIONS TO THE PM4104APDA

The PM4104APDA evaluation board has external connectors to connect the various equipment required to evaluate the

SA4104A/B 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 6 and Figure 7 illustrate the connection of the PM4104APDA for a shunt and

current transformer application respectively.

Table 3: External connectors on the PM4104APDA

Connector

Description

JS1

Connection Point for Current Sensor: Connect the shunt resistor or the current transformer to this

connector. The current sensor should be connected in such a way that a positive current flows “in” on

terminal “P” and “out” on terminal “N”. The connector also has a reference terminal “0” which can be

used to connect the reference of the shunt resistor.

JS2

Connection Point for Mains Voltage: The mains voltage must be connected on this connector. The “N”

terminal is the reference level of the module and the “L” terminal is the potential input. In the case of a

current transformer the NEUTRAL line is typically the reference level of the meter and therefore

NEUTRAL is connected to “N” and LIVE to “L”. When a shunt resistor is used to sense the current in

the LIVE line, the LIVE line acts as the reference of the meter. In this case LIVE should be connected

to “N” while the NEUTRAL line is connected to the “L” terminal.

JS3

Connection Point for Power Supply: The power supply to the PM4104APDA 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.

JS4

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 SA4104A/B. When an impulse counter is

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

terminals respectively.

JS5

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 PM4104APDA. The pulse output is primarily used for performance

evaluation and calibration of the SA4104A/B.

J7

interfacing the pulse output to external circuitry.

J9

Direction Output: This connector contains the DIRO output of the device (centre terminal) as well as

J11

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

interfacing the motor output to external circuitry.