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The IOT measures the line current and voltage to schedule heater requests. The line current
measured includes the DC converter and finisher currents. The IOT limits heater requests
when required so that the line current rating is not exceeded.
characteristics.
Table 2 Power Supply Output Ratings
Channel and Function
Heater Ohms
Ink Melt Color 1
92
Ink Melt Color 2
92
Ink Melt Color 3
92
Ink Melt Color 4
92
Pre-Heater 1
53
Pre-Heater 2
53
Drum 1
22/88
Drum 2
22/88
NOTE: Drum channels have relays to put two heaters in parallel or series depending upon AC
input line voltage 115/230VAC.
AC Output Load Control
The eight heater channels are controlled by a serial data link isolated from the secondary. Each
channel's output Triac has an associated relay used to disable the channel when the power
switch is opened or when the Heater2_ON signal is not present. The Heater2_ON signal is a
3.3V TTL signal. The serial data link reports line voltage and current back to the IME.
Printhead Heater Control
The Common Heater Relay Enable signal controls the Printhead heaters. In the event of a
thermistor short or thermal runaway, the relay disconnects the printhead heaters by disabling
the power to the marking unit heater board. This relay is driven by the 3.3V TTL signal, Com-
mon Heater Relay. This relay is intended to disconnect the heaters in case of a shorted triac
and thermal run-away of heaters.
Drum Heater Selection
The high-level on the Drum 115-1 signal activates the drum heaters in parallel. A high-level on
the Drum 230-1 puts the drum heaters in series. These relays are controlled by a 3.3V TTL sig-
nal.
Drum Drive Motor Inverter
The 3-phase drum drive motor inverter is implemented in the AC section. This output uses the
400V DC link from the power factor connector as its power source. The inverter phase current
is 3A, with a maximum phase current of 5A. The inverter is controlled by three phase signals
and an enable signal that are optically coupled from the secondary. The power supply also
sends a motor phase current sense signal back to the IOT. The required combination of signals
is computed by the IOT according to drum drive motor position and current. Refer to
ColorQube® 9303 Family
Table 2
lists heater electrical
Average
RMS Current @
Wattage
115VAC
109 W
1.1 A
109 W
1.1 A
109 W
1.1 A
109 W
1.1 A
250 W
2.17 A
250 W
2.17 A
600 W
5.2 / 2.6 A
600 W
5.2 / 2.6 A
WD
DC Output
The power supply's DC outputs are listed in
Table 3 DC Output Specifications
Min/Nom/Max Peak
DC Voltage
Current (A)
3.3V ESTAR
2/4/7
+ 17VDC
0.55/2.7/3.4
+5 VDC
0.25/3.9/6
+12VDC
0.2/6/10
-12VDC
0.1/0.5/1
+24VDC
0.55/7.7/13
+50VDC
0.2/3.5/6 peak for
30ms, all at 0.6hz
rate
-50VDC
0.0/1.5/3
Thermal Protection
The power supply includes thermal protection that shuts down the power supply if the temper-
ature exceeds the set point. If the set point is reached and thermal protection activated, cycle
the power switch to reset the power supply.
DC Interlock
An interlock is present in the power supply to protect the Quad Wave Amp. The 50V outputs
are disabled any time the +24V, 12V, and +5V outputs are disabled.
Over Voltage and Over Current Protection
During over-voltage or current limit conditions of the 3.3V ESTAR or 17V supplies, the power
supply shuts off and requires a cycling of the AC power switch to restart. If an over current or
over voltage occurs on +24V, 12V, or 5V, these outputs will be disabled in addition to the 50V
outputs. If an over current on 50V occurs, only these outputs will be disabled. The shutdowns
will be indicated by faults 01-525-00 through 01-546-00.
limits.
Table 4 Over voltage and current limits
DC Voltage
Shutdown Voltage
+3.3 V
+ 4.5 V
+ 5 V
+ 6.2 V
1.3.
+ 12 V
+ 16 V
-12 V
-16 V
February 2013
8-15
Table
3.
Min/Nom/Max Peak
Regulation, PARD
Power (W)
3.3±2.5%, 300mv at
7/13/23
2MHz
N/A, source from+24 V
13/63/80
supply, 500mV at 2MHz
BW
5.15± 2%, 300mv at
1/20/30
2MHz
12 ± 5%, 300mv at 2MHz 2/72/120
-12 ± 5%, 300mv at
1/6/12
2MHz
+24.5 ± 5%, 300mv at
13/190/320
2MHz
+50 ± 2%, 500mv at
10/175/300
2MHz
-50 ± 2%, 500mv at
0/175/150
2MHz
Table 4
lists the voltage and current
Shutdown Current
12 A
9 A
16 A
-
Principles of Operation
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