4.4 SECTION FOUR - COMPONENT DESCRIPTION AND SPECIFICATION
4.1.2.4. Monitoring and Fault Logic
There are two fault outputs in the supply. The "Customer Fault Output" is relay
K2 (4C1) capable of sinking or sourcing 1 amp and withstanding up to 75V. It
is "closed" during normal operation and will be "open" to indicate a fault. The
faults that are detected are Thermal Fault, Loss of Phase, Bus Over voltage,
Regen Fuse Blown and Soft start. Note that a fault indication in the power
supply will not stop the supply from operating, except that a blown regen fuse
will not allow the DC bus relay K1 to close. This means that the DC bus will
remain at 0VDC if the fuse is blown or missing when the unit is powered up.
The fault output relay should be monitored by the customer and the system
shut down in the event of a power supply fault. The Loss of Phase fault can
only be read through this fault relay output.
The "PSF" bit, an open collector output, goes out to the back plane and to each of
the controllers in the rack. It detects the same faults as the customer fault relay with the
exception of Loss of Phase and Thermal Fault. If the PSF bit detects a fault the
controllers disable. In the -007 and -008 models the soft start condition (i.e. powering up
the DC bus from high voltage AC) causes a "PSF fault". This is done to prevent the
controllers from enabling before the DC bus is fully charged. If the controllers were to be
enabled during soft start, the DC bus would not get fully charged and at the end of the soft
start period a hard start (i.e. very high inrush currents) would occur.
INTERNAL 40 WATTS
POWER (WATTS) TIME (SECONDS)
40 CONTINUOUS
50 90
100 15
200 6
300 4
500 2.5
1000 1.2
EXTERNAL 240 WATTS
POWER (WATTS) TIME (SECONDS)
240 CONTINUOUS
300 180
500 29
1000 9
1500 5
2000 4
2500 3
4000 1.8
TABLE 4.2 MODEL 160-007,008 POWER SUPPLY REGEN ELECTRONIC
CIRCUIT BREAKER TRIP CHARACTERISTICS
4.1.3. Specifications
A-C Input Voltage 220 VAC ±15% 50/60 Hz
D-C Output Voltage 300 VDC No-Load Unregulated
