Rs-232C Interface Specifications; For Cu-4000 - Denso BHT-4000 User Manual

3.1 RS-232C Interface Specifications

3.1.1 For CU-4000

[ 1 ] Interface Connector and Pin Assignment
The CU-4000 has an RS-232C interface port (Dsub-25S).
Pin No. Signal
2 SD
3 RD
4 RS
5 CS
7 SG
20 ER
Pins 1 (FG), 6 (DR), and 8 (CD) are not connected.
The input/output voltage threshold for the logical valued signal is listed below.
Logical Value
0
1
13
25
RS-232C interface port (Dsub-25S) on the CU-4000
Functions
Send data
Receive data
Request to send
Ready to send
Signal ground
Data terminal equipment ready
Input Voltage Threshold
3V min.
-3V max.
1
14
Signal Input/Output
CU-4000
Output Voltage Threshold
5V min.
-5V max.
72
External device
→
←
→
←
—
→