Power Supply Unit - Canon CXDI-40G COMPACT Service Manual

*Note
When connecting an X-ray generator and a power box, generally, one power box should
be connected to one X-ray interface (I/F) channel. However, in certain rare cases, such as
when there are not enough X-ray I/F channels, multiple power boxes are connected in
parallel to a single X-ray I/F channel. In this connection method, if all PWB-40EXRAY
boards in the power box have an operating voltage of 12 V, and one of them is replaced
with a PWB-40EXRAY board with an operating voltage of 5 V, the replaced board can be
damaged.
To prevent this from occurring, extended X-ray I/F channels must be added if possible to
distribute I/F channels.
*If the I/F channels are distributed, 5V and 12V PWB-40EXRAY boards can be used
together without a problem.
X-RAY Generator
I/F Channel
I/F Channel

2.2 Power Supply Unit

(1) AC/DC power supply used mainly for the sensor unit
Rated input voltage: AC 100-120V, AC 200-240V
Rated output voltage: 9.5V for CH1, 9.5V for CH2, 6.8V for CH3, –11.5V for CH4, 27V
for CH5
(2) Additional functions
a. Overcurrent protection: Suspended auto reset when an overcurrent is detected
CH1, CH2: Detection/suspended auto reset at 105% or more of peak current (3.5A)
CH3: Detection/output OFF at 200% or more of nominal current (2.5A)
CH4: Detection/suspended auto reset at 105% or more of nominal current (0.2A)
CH5: Detection/suspended auto reset at load current (500mA)
Note: Output OFF is also initiated for CH4 and CH5 when the CH3 function has been
activated.
b. Overvoltage protection: Shutdown of output when an overvoltage is detected
An overvoltage is detected at 115% or more of the rated voltage.
3. Function
Power Box
X-RAY I/F Board (12V)
Power Box
X-RAY I/F Board (12V)
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X-RAY I/F Board (5V)