70
Pin No.
Signal
Functions
Signal Input/Output
CU-5001 External device
2
SD
Send data
→
3
RD
Receive data
←
4
RS
Request to send
→
5
CS
Ready to send
←
7
SG
Signal ground
—
20
ER
Data terminal equipment ready
→
Pins 1 (FG), 6 (DR), and 8 (CD) are not connected.
■
CU-5002
3.1 RS-232C Interface Specifications
3.1.1 For CU-5000
[ 1 ] Interface Connector and Pin Assignment
The CU-5000 has an RS-232C interface port (Dsub-25S).
25
13
14
1
RS-232C interface port (Dsub-25S) on the CU-5000
■
CU-5001
Pin No.
Signal
Functions
Signal Input/Output
CU-5002 External device
1
FG
Frame ground
—
2
SD
Send data
→
3
RD
Receive data
←
4
RS
Request to send
—
5
CS
Ready to send
—
6
DR
Data set ready
—
7
SG
Signal ground
—
8
CD
Carrier detect
—
20
ER
Data terminal equipment ready
—
The input/output voltage threshold for the logical valued signal is listed below.
Logical Value
Input Voltage Threshold
Output Voltage Threshold
0
3V min.
5V min.
1
-3V max.
-5V max.