参数资料
型号: 71M6511-DB
厂商: Maxim Integrated Products
文件页数: 28/115页
文件大小: 0K
描述: BOARD DEMO 71M6511 ENERGY METER
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 1
主要目的: 电源管理,电度表/功率表
嵌入式:
已用 IC / 零件: 71M6511
已供物品: 2 个板,线缆,CD,电源
71M6511/71M6511H Demo Board User’s Manual
SHUNT
NEUTRAL
The three wires must
be connected
directly at the shunt
resistor
RED
GREEN
BLUE
Low crosstalk demands
that these three current
paths not share a
common wire.
WHITE
LOAD
LIVE
J4
JP17 2 1
1
3
JP16 3
2
1 J3
LIVE
No
connection
NEUTRAL
star point
V3P3
71M6511/
71M6511H
IA
V3P3
VA
J9
NEUTRAL
R32
750
C9
1000pF
Voltage
Divider
2.5MOhm
R15-R18
Power
Supply
C6
GND
71M6511/6511H Demo Board
6/19/2007
Figure 1-9: Current Shunt Operation Mode (Shown for the D6511T4A7 2-layer PCB)
The IMAX variable has to re-calculated for current shunt mode using the formula:
IMAX = 177mV/R shunt
The new value for IMAX (XRAM address 0x0A) should be entered, using the command line interface, as
follows (example shown assuming R shunt = 400μ ? , with resulting IMAX = 440):
>)A=+4400
Note: IMAX values have a LSB resolution of 0.1A, VMAX values have a LSB resolution of 0.1V
Note: Since IMAX has been changed, WRATE has to be recalculated to maintain the desired Kh.
If desired, the Demo Code can be set to run with increased gain (8 instead of 1) of the current channels, as
sometimes required in current shunt mode due to low currents and low shunt resistances. This can be done
via the command line interface by the commands
>]2A=+15
>]2B=+15
setting IA_8 to 8 by controlling IA_SHUNT at address 0x2A, if IA_IN is connected
to the shunt, or
setting IB_8 to 8 by controlling IB_SHUNT at address 0x2B if IB_IN is connected
to the shunt.
Typically, only one shunt resistor is used in a meter. Isolation requires a transformer for
the second shunt resistor when using two shunts in a meter.
Page: 28 of 115
? 2005-2007 TERIDIAN Semiconductor Corporation
Revision 5.4
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