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5.2 Components and Functions
Status indicators
POWER LED (green)
Lights when the power is
applied to the CU.
DATA Communications LED (green)
Lights when the BHT is communicating
with the host PC.
IrD
A
interface port
Used to exchange data
optically with the BHT.
BHT charge terminals
Do not stain these terminals; doing
so could result in a lower charging
efficiency.
Interface connector
Used to exchange data with the host PC or
communications station.
The CU-201/221 has an RS-232C port or
USB port, respectively.
DIP switch
(Provided on CU-201)
Used to set the CU's transmission speed.
Power inlet connector
Plug the dedicated AC adapter into this connector.
Without connecting the AC adapter, the CU-221 can work if the
power (5 V, 500 mA) is supplied via the USB host or USB hub.