Denso BHT-400B-CE - Manual (Page 160)

5.3 Applying Power to the CU-400
CU-401: The CU-401 should be powered from a wall socket via the dedicated AC adapter. Connect the
outlet plug of the AC adapter to the power inlet connector of the CU-401, then plug the other end into a
wall socket.
CU-421: The CU-421 should be powered from a wall socket via the dedicated AC adapter or from the
USB host (PC) or USB hub via the USB interface.
Connecting the AC adapter supplies power to the CU-421. If no AC adapter is connected, turning on the
USB host (PC) and USB hub supplies power to the CU-421.
NOTE: To charge the battery cartridge, use the AC adapter except when the CU-421 is connected to a
self-powered hub capable of supplying power (5V 500 mA) via the USB line.
NOTE: To charge the battery cartridge even when the USB host (PC) is in suspend mode, use the AC
adapter.
Power inlet connector
AC adapter
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