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PDF SA2007M Data sheet ( Hoja de datos )
| Número de pieza | SA2007M | |
| Descripción | Single Phase Power/Energy Metering IC with Tamper Detection | |
| Fabricantes | Sames | |
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Single Phase Power/Energy Metering IC with
Tamper Detection
SA2007M
sames
FEATURES
+ Provides direct interface to mechanical counters
+ Monitors Live and Neutral for tamper detection
+ Performs bidirectional energy measurement
+ Various setup modes selectable
+ Meets the IEC 521/1036 Specification for Class 1 AC Watt
hour meters
+ Total power consumption rating below 30mW
+ Adaptable to different types of sensors
+ Operates over a wide temperature range
+ Precision voltage reference on-chip
+ Precision oscillator on chip
DESCRIPTION
The SAMES SA2007M is a single-phase bidirectional energy
metering integrated circuit. It provides a mono-chip solution for
energy meters with electro-mechanical displays, such as
stepper motors and impulse counters. A precision oscillator,
that replaces an external crystal is integrated on chip.
Two current sensor inputs allow the measurement of energy
consumption on both the live and neutral.
Direction detection of energy flow as well as other common
tamper conditions are flagged.
The power consumption on both the live and neutral are
continuously measured and the larger of the two is selected for
energy metering.
The SA2007M drives the calibration LED, the indicator LEDs
and the electro-mechanical counter directly.
The SA2007M integrated circuit is available in 20 pin dual-in-
line plastic (DIP-20) and small outline (SOIC-20) package
types.
VDD VSS
IIN1
IIP1
IIN2
IIP2
IVP
GND
ANALOG
SIGNAL
PRO-
CESSING
AND
POWER
CAL-
CULATION
POWER 1 (DIGITAL)
POWER 2 (DIGITAL)
COM-
PARATOR
VOLTAGE
REF.
OSC
POWER
TO
PULSE RATE
Dr-01558
VREF
TCLK
MP1 MP0
RATED
Figure 1: Block diagram
ELT
SEL1
DIRO
LED
MOP
MON
SPEC-0075 (REV. 2)
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PRELIMINARY
16-01-01
1 page  
SA2007M
INPUT SIGNALS
VREF
A bias resistor of 24kW sets optimum bias and reference
conditions on chip. Calibration of the SA2007M should be
done on the voltage input as described in Typical Application.
Motor pulse rate select (MP1 and MP0)
The pulse rate of the motor driver output of the SA2007M is
selected by the inputs MP1 and MP0. Three pulses rate
options are available as shown in the following table:
Pulse rate selection
Pulse Rate
Selection Input
MP1
MP0
Motor drive
output
selection
Unit
VSS
VSS
1 pulses/kWh
VSS
VDD
10 pulses/kWh
VDD
VSS
100 pulses/kWh
VDD VDD Device test mode
Please note that the device will not perform metering functions
as described in this document while in test mode.
Rated condition select (RATED)
The rated condition select pin gives the option of having a 3:2:1
scaling ratio for the rated meter current. This feature is
particularly useful in circumstances where a manufacturer
requires a meter for use in a system rated for two different
conditions, for example 230V/60A and 230V40A. With the
rated condition select the SA2007M allow for the development
of different rated meters requiring minimal changes. The
following table below lists the option available (assuming the
rated condition to be 230V/60A).
Rated condition select (RATED)
Signal Input RATED
Rated Conditions
VSS
OPEN
230V / 20A
230V / 40A
VDD 230V / 60A
sames
OUTPUT SIGNALS
Motor output (MOP, MON)
The MON pulse will follow the MOP pulse within 142ms. This
prevents that the motor armature is in the wrong position after a
power failure. Both MOP and MON outputs are active high.
The motor drive wave forms are shown below:
MOP
VDD
VSS
MON
VDD
VSS
DR-01559
tm tm tm
tm = 142ms
Figure 4: Motor drive on MON and MOP pins
LED output (LED)
The LED output pulse at a fixed rate of 6400 pulses per kWh.
The LED output is active low. The LED waveform is shown
below:
LED
VDD
VSS
DR-01332
tLED
Figure 5: LED pulse output
An integrated anti-creep function prevents any output pulses if
the measured power is less than 0.02% of the meters rated
current.
Selected input indicator (SEL1)
The SA2007M continuously compares the power
consumptions on current channel 1 inputs and current channel
2 inputs. The larger of the two measurements are used for
metering. The SEL1 output pin indicates which channel is
currently being used for the pulse output.
Signal
Output
SEL 1
Value
Description
0 Channel 1 selected (IIN1/IIP1)
1 Channel 2 selected (IIN2/IIP2)
Switching between channels will not be faster than once per
second when both channels are balanced.
http://www.sames.co.za
5/10
PRELIMINARY
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet SA2007M.PDF ] | |
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