GE Energy
CAR2512FP series rectifier
Input: 90Vac to 264Vac; Output: 12 Vdc @ 208A; 3.3Vdc or 5 Vdc @ 1A
Device
Address
Address Bit Assignments
(Most to Least Significant)
Output signals
Output current monitor (Imon): A voltage level of 3V = 200A
proportional to the delivered output current is present on
this pin.
MCU
EEPROM
0xBx
0xAx
1
1
0
0
1
1
1
0
A2 A1 A0 R/W
A2 A1 A0 R/W
Address lines (A2, A1, A0): These signal pins allow up to eight
(8) modules to be addressed on a single I²C bus. The pins are
pulled HI internal to the power supply. For a logic LO these
pins should be connected to ‘Output Return’
AC OK: A TTL compatible status signal representing whether
the input voltage is within the anticipated range. This signal
needs to be pulled HI externally through a resistor.
Maximum sink current ≤ 20mA and the max voltage is
12Vdc. Open collector (HI) on this signal indicates that the
input voltage is applied within the specified input range.
Serial Clock (SCL): The clock pulses on this line are generated
by the host that initiates communications across the I²C
Serial bus. This signal is pulled up internally to 3.3V [ 5V5 ] by
a 10kΩ resistor. The end user should add additional pull up
resistance as necessary to ensure that rise and fall time
timing and the maximum sink current is in compliance to
the I²C specifications.
DC OK: A TTL compatible status signal representing
whether the output voltage is present. This signal is
internally pulled HI to 3.3V via a 10kΩ resistor. Maximum
sink current ≤ 4mA and the max voltage is 12Vdc. Open
collector (HI) on this signal indicates that the output voltage
is present.
Serial Data (SDA): This line is a bi-directional data line. . This
signal is pulled up internally to 3.3V [ 5V ] by a 10kΩ resistor.
The end user should add additional pull up resistance as
necessary to ensure that rise and fall time timing and the
maximum sink current is in compliance to the I²C
specifications.
Over temp warning: A TTL compatible status signal
representing whether an over temperature exists. This signal
needs to be pulled HI externally through a resistor.
Maximum sink current ≤ 20mA and the max voltage is
12Vdc. Open collector (HI) on this signal indicates that
temperatures are normal.
EEPROM
The microcontroller has 96 bytes of EEPROM memory
available for the system host.
If an over temperature should occur, this signal would pull
LO for approximately 10 seconds prior to shutting down the
power supply. The unit would restart if internal temperatures
recover within normal operational levels. At that time the
signal reverts back to its open collector (HI) state.
Another separate EEPROM IC will provide another 128 bytes
of memory with write protect feature. Minimum information
to be included in this separate EEPROM: model number,
revision, date code, serial number etc.
Fault: A TTL compatible status signal representing whether
a Fault occurred. This signal needs to be pulled HI externally
through a resistor. Maximum sink current ≤ 4mA and the
max voltage is 12Vdc. Open collector (HI) on this signal
indicates that no Fault is present.
See the communications protocol for further information.
Communications Protocol
The I²C protocol is described in detail by the I2C and PMBus
Serial Communications Protocol for the CAR Family of Power
Supplies application note.
This signal activates for OTP, OVP, OCP, AC fault or No
output.
PS Present: This pin is connected to ‘output return’ within the
power supply. Its intent is to indicate to the system that a
power supply is present. This signal may need to be pulled
HI externally through a resistor.
The Y01A suffix module supports only the I2C command set.
LEDs
Two LEDs are located on the front faceplate. The AC_OK LED
provides visual indication of the INPUT signal function.
When the LED is ON GREEN the power supply input is within
normal design limits.
Interrupt (SMBAlert): A TTL compatible status signal,
representing the SMBusAlert# feature of the PMBus
compatible i2C protocol in the power supply. This signal
needs to be pulled HI externally through a resistor.
Maximum sink current ≤ 4mA and the pull up resistor should
be tied to 3.3Vdc. Open collector (HI) on this signal indicates
that no Interrupt has been triggered.
The second LED DC/FLT is a tri-state LED. When GREEN there
are no faults and DC output is present. When AMBER a fault
condition exists but the power supply still provides output
power. When RED then a fault condition exists and the
power supply does not provide output power.
Serial Bus Communications
The I²C interface facilitates the monitoring and control of
various operating parameters within the unit and transmits
these on demand over an industry standard I²C Serial bus.
All signals are referenced to ‘Signal Return’.
Device addressing: The microcontroller (MCU) and the
EEPROM have the following addresses:
5 Module configured with 5V standby output
July 18, 2012
©2012 General Electric Company. All rights reserved.
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