Equivalent to MAX232
Mark=(-8V): At Busy
DTR
Space=(+8V): At Ready
(2) Others
•RESET
: A signal to reset the entire printer.
•PE
: A signal to show that the paper has run out. Normal at the "LOW" level, but turned to
the "HIGH" level when the paper has run out.
•GND
: Signal ground
•FG
: Frame ground
Mark=(-8V): 1
TXD
Space=(+8V): 0