Epson SQ-B50/2550 Technical Manual page 271

Table A-5. E05A22EA Terminal Functions (Continued)
REV.-A
Pin No. Terminal I/O Description
53 H19 0 Head data output 19th nozzle
54 H2O
0
Head data output 20th nozzle
55 H21 0 Head data output 21th nozzle
56 H22 0 Head data output 22th nozzle
57 H23 0 Head data output 23th nozzle
58 H24
0
Head data output 24th nozzle
59 P4 I/O
Multi purpose I/O (TTL level)
60
VSS(GND)
-
GND
61 - 63 P5 - P7 I/O Multi purpose I/O (TTL level)
64
VDD(+5V)
-
Power sourse
A-13