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SA2005 Fiches technique(PDF) 6 Page - Sames

No de pièce SA2005
Description  Programmable Three Phase Power / Energy Metering IC for Stepper Motor / Impulse Counter Applications
Download  16 Pages
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Fabricant  SAMES [Sames]
Site Internet  http://www.sames.co.za
Logo SAMES - Sames

SA2005 Fiches technique(HTML) 6 Page - Sames

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Figure 6: Multiplexing of the LED Drivers
D1
DIR1
D3
DIR2
D4
VFAIL2
D2
VFAIL1
D5
DIR3
D6
VFAIL3
R9
R10
R11
PH/DIR
PH1
PH2
PH3
DIR 1
DIR 2
DIR 3
DIR (Drive)
PH (Sink)
VFAIL 1
VFAIL 2
VFAIL 3
Channel 1
Channel 2
Channel 3
dr-01603
The PH/Dir output is used in conjunction with the LED driver
outputs to display information about each individual phase, see
figure 6.
Phase LED Drivers (PH1, PH2, PH3)
The LED driver outputs present either direction information or
voltage information. The three LED driver outputs are used in
conjunction with the PH/DIR output to display information
about each individual phase (refer to figure 6) as follows:
PH/DIR = 1 (Direction indication)
When PH/DIR is high (logic 1) energy direction information for
each individual phase is available on PH1, PH2 and PH3. A
logic 0 indicates reverse energy flow and a logic 1 indicates
positive energy flow. Reverse energy flow is defined as the
condition where the voltage sense input and the current sense
inputs are out of phase (greater than 90 degrees). Positive
energy flow is defined as the condition where the voltage
sense and current sense inputs are in phase.
PH/DIR = 0 (Voltage fail / phase sequence error)
When PH/DIR is low (logic 0) voltage information is available
on PH1, PH2 and PH3. A logic 0 on any of these pins indicates
a voltage failure, the SA2005P does not detect a zero crossing
on the applicable voltage sense input. Referring to figure 6 the
voltage fail LED will be on when the voltage phase is present
and off when the voltage phase is missing.
In the case of a phase sequence error all three LED driver
outputs PH1, PH2 and PH3 will pulse with a repetition rate of
approximately 1Hz.


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