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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).
13
1
25
14
RS-232C interface port (Dsub-25S) on the CU-5000
■ CU-5001
Pin No.
Signal
2
3
4
5
7
20
SD
RD
RS
CS
SG
ER
Functions
Signal Input/Output
CU-5001 External device
Send data
Receive data
Request to send
Ready to send
Signal ground
Data terminal equipment ready
→
←
→
←
—
→
Pins 1 (FG), 6 (DR), and 8 (CD) are not connected.
■ CU-5002
Pin No.
Signal
1
2
3
4
5
6
7
8
20
FG
SD
RD
RS
CS
DR
SG
CD
ER
Functions
Signal Input/Output
CU-5002 External device
Frame ground
Send data
Receive data
Request to send
Ready to send
Data set ready
Signal ground
Carrier detect
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.
70