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5.6 Interface Specifications
[ 1 ] Interface Connector and Pin Assignment
CU-201
The CU-201 has an RS-232C interface port (Dsub-9P).
RS-232C interface port (Dsub-9P) on the CU-201
Pin No. Signal Functions
Signal Input/Output
CU-201 External device
2 RD Receive data ←
3 SD Send data →
4 ER Data terminal equipment ready →
5 SG Signal ground —
6 DR Data set ready —
7 RS Request to send —
8 CS Ready to send —
The input/output voltage threshold for the logical valued signal is listed below.
Logical Value Input Voltage Threshold Output Voltage Threshold
0 3V ≤ n ≤ 15V 5V min.
1 -15V ≤ n ≤ -3V -5V max.
CU-221
The CU-221 has a Full-Speed USB 1.1-capable port (Series B receptacle).