Adata SP300 Specifications download pdf (Page 12)

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2-2. Interface Circuit

2-2-1.RS-232C Serial Interface

Input (RXD, CTS)

Output (DTR, FAULT, TXD, RCH, RTS)

Fig . 2-1 RS-232C interface circuit

2-2-2.Current Loop (option)

Input (TTY-RXD, TTY-RXDR)

Output (TTY-TXD, TTY-TXDR)

Note: Adjust “R” so that the loop current is set within 10 to 20 mA.

Fig. 2-2 Current loop interface circuit

Printer Host computer

75189 or equivalent

+V

Host computer

R

Printer

+V

Host computer

R

Printer

75188 or equivalent

Printer Host computer

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