SA4106A
Device Setup
The SA4106A has to be set to STANDARD mode. Using
Equations 1 and 2 in the Rated Condition Select section the
required LED and motor dividers for 1600imp/kWh and
100imp/kWh respectively are calculated as DF_LED = 880
and DF_MO = 16. Using Table 3 the device is set up using
The lowest possible creep limit is chosen to allow the meter
to register energy at very low currents, so ACSEL is left
floating. In order to obtain the highest immunity against
tampering the SA4106A is set up to measure bidirectional
energy by connecting DIRI to DIRO.
FMS = VSS, R3 = VDD, R2 = VSS, R1 = VDD and R0 = VSS
.
R5
R6
R7
P1 1k
R9
NEUTRAL
240k
220k
180k
2.7k
C3
2.7nF
0V
0V
LIVE IN
U1
IIN
0V
R3
R4
1
2
20
19
AGND
IVP
200
200
0V
R8
C2
RSH
100nF
320µ
C1 100nF
R2
100k
0V
CNT1
R1
+2.5V
IIP
7 6 5 4 3 2 . 1
R13
200
200
12
15
13
MOP
MON
LED
U2
100
R12
R10
LIVE OUT
3
VREF
VSS
Pulse Out
47k
+2.5V
C4
-2.5V
14
100
R11
D1
Pulse
4N35
+2.5V
8
5
680
VDD
R1
+2.5V
220nF
R14
16
17
D2
Creep
C6
ACST
DIRO
1k
1µF
11
6
0V
C5
220nF
R3
R15
D3
Direction
R0
1k
4
18
9
R2
DIRI
-2.5V
7
FMS
SA4106A
ACSEL
-2.5V
Figure 11: Typical application circuit
Table 6: Component list for typical application
Symbol
U1
Description
Symbol
Description
R14, R15
P1
Resistor, 1k, 5%, carbon film
Trim-pot, 25 turns, 1k
Energy metering device, SA4106ASAR
Opto-coupler, 1N35
U2
C1, C2
Capacitor, 100nF, ceramic
Capacitor, 2.7nF, ceramic
Capacitor, 220nF, ceramic
Capacitor, 1μF, ceramic
RSH
R1, R21, R3,
R41
Shunt Resistor, 40A, 320μ
C3
Resistor, 200, 1%, metal film
C42, C52
C62
R5
Resistor, 240k, 1%, metal film
Resistor, 220k, 1%, metal film
Resistor, 180k, 1%, metal film
Resistor, 100k, 1%, metal film
Resistor, 2.7k, 1%, metal film
Resistor, 47k, 1%, metal film
Resistor, 680, 5%, carbon film
Resistor, 100, 5%, carbon film
R6
D1
Light emitting diode, pulse output
R7
R81
Light emitting diode, anti-creep state
output
D2
Light emitting diode, energy direction
output
R9
D3
R101
R11
R12, R13
CNT1
Stepper motor counter, 100imp/kWh
Note 1: Resistors R2, R4, R8 and R10 must be positioned as close as possible to the respective device pins
Note 2: Capacitors C4, C5 and C6 must be positioned as close as possible to the VDD and VSS power supply pins
SPEC-1587 (REV. 5)
29-09-2017
15/18
SAMES [ SAMES ]
