GE Industrial Solutions CAR1212FP series - Manual (Page 5)

GE Energy
CAR1212FP series rectifier
Input: 85Vac to 264Vac; Output: 12 Vdc @ 1250W; 5 Vdc @ 0.5A
July 20, 2012 ©2012 General Electric Company. All rights reserved. Page 5
current ≤ 20mA and the max voltage is 12Vdc. Open
collector (HI) on this signal indicates that the output voltage
is present.
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.
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.
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.
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.
Interrupt (SMBAlert): A TTL compatible status signal,
representing the SMBusAlert# feature of the PMBus
compatible i
2 C 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.
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:
Device Address Address Bit Assignments
(Most to Least Significant)
MCU 0xBx 1 0 1 1 A2 A1 A0 R/W
EEPROM 0xAx 1 0 1 0 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’
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 not pulled up internally. The end
user should add pull up resistance to 5Vdc as necessary to
ensure that rise and fall time timing and the maximum sink
current is in compliance to the I²C specifications.
Serial Data (SDA): This line is a bi-directional data line. . This
signal is not pulled up internally . The end user should add
pull up resistance to 5Vdc as necessary to ensure that rise
and fall time timing and the maximum sink current is in
compliance to the I²C specifications.
Communications Protocol
The I²C protocol is described in detail by the I 2 C and PMBus
Serial Communications Protocol for the CAR Family of Power
Supplies application note.
The Y01A suffix module supports only the I 2 C command set.
I/O Expander option (PCF8574ATD-T)
The CAR1212FPx without extended i2c communications
(blank under the software option) has a single status/control
byte I/O expander that is accessible via default address
0 x 7Eh (A2, A1, A0 are pilled HI). This byte takes the form;
7 6 5 4 3 2 1 0
n/s n/s Fault ON/OFF Temp_OK n/s DCOK ACOK
n/s – not supported
Bits 0, 1, 3, and 5 are ‘read_only’ and are HI [1] during normal
operation. The rectifier needs to be biased externally in order to
‘read’ its operational state without the presence of input power.
Bit 4 is a ‘read/write’ bit that can be used to verify the ON/OFF
commanded state or change the commanded output of the
rectifier. In order to turn the output OFF this bit needs to be pulled
LO [0].
No PEC support is provided. Standard i 2 c commands apply.
LEDs
Three 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.
When the DC_OK LED is GREEN the DC output is present.
When the FAULT_LED is RED then a fault condition exists
and the power supply may not provide output power. The
table below further defines these states: