Citizen Systems iDP-562 - page 16

iDP-562 User’s Manual
CITIZEN 16
5.5 Current Loop and TTL
5.5.1 Interface Loop
(a) Current Loop
Input (RD)
Printer side Computer side
Output (DTR)
Note: Resistance should be set so that Current Loop is restricted within 10 ~ 20 mA.
(b) TTL
Input (RD) Printer side Computer side
Equivalent to 7407
Output (DTR FAULT)
Note: Output is open collector.