Denso 400BW-CE User Manual page 143

(3)-1 Interface circuit (USB)
(3)-2 Interface circuit (RS-232C)
TxD, RTS
Signal Level
Output voltage "H" (3KΩ load)
Output voltage "L" (3KΩ load)
(Note 1) Input / Output voltages are specified at the terminal of the interface connector.
(Note 2) Output voltage becomes unsettled when the connector communication device file is
closed.
(Note 3) Output voltage shall be under the following conditions:
Power voltage: Rated voltage
Load resistance: 3 kΩ
USB Driver／Receiver
Output circuit
Item
Input voltage "H"
Input voltage "L"
Chapter 3 Communications Operations of the BHT
Input circuit
RxD, CTS
5kΩ
Min.
5V
-15V
3V
-15V
123
Max.
15V
-5V
15V
-3V