SA9607P

http://www.sames.co.za.

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DEVICE CONFIGURATION

SIGNAL FLOW DESCRIPTION

The following is an overview of the SA9607P's registers. For

a detailed description of each parameter please refer to

parameter description section.

Figure 6 shows the various registers in the SA9607P's power

to pulse rate block. The inputs to this block are two single bit

pulse density modulated signals, each having a pulse rate of

641454 pulses per second at rated conditions. The parameters

Kc1, Kc2, Ne, Cs, Kr, Cres, and Cled contain values which are

read from the external EEPROM during power up.

The divider registers, Channel 1 Balance and Channel 2

Balance, are used for calibration and to balance the gain of

each channel. The Earth Leakage Compensation register is

used to compensate for any permissible earth leakage that

may cause the SA9607P to indicate a tamper condition at low

current. TheChannel Select register selects the source (channel

1 or channel 2) which will be used for the pulse output. Register

Rated Condition is used to program the rated condition of the

meter and feeds the registers LED-constant and Counter

Resolution with the applicable pulse rate. These two registers

are programmed to select the LED output rate and the counter

resolution (pulses per kWh) respectively. The Counter Pulse

Width register is used to program the pulse width for the

mechanical counter driver output MOP and MON.

Figure 6: Signal flow block diagram

Channel 1

Balance

÷Kc1

Channel 2

Balance

÷Kc2

Earth Leakage

Compensation

Ne

Channel Select (1, 2, auto) Cs

Rated Condition

÷Kr

Counter

Resolution

Cres

Counter

Pulse width

CPW

LED-Constant

Cled

MOP

MON

LED

Normally 6400p/kWh

Normally 1253p/s

Channel 1 Power

641454p/s

Channel 2 Power

641454p/s