2. interface circuit, 2-1. rs-232c serial interface, 2-2. current loop (option) – Star Micronics SP300 User Manual
Page 12
– 8 –
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