Epson RC420 Manual page 62

Setup & Operation 7.2 Protected Expansion I/O Board (Expansion I/O Board - Optional)
Protected Expansion I/O Board
Typical Input Circuit Application 2: PNP
52
470 Ω
2.2 kΩ
(Same)
(Same)
(Same)
(Same)
(Same)
~
(Omit)
1 Input No.48 to 51 common
3 Input No.48
4 Input No.49
5 Input No.50
6 Input No.51
51 Input No.52 to 55 common
53 Input No.52
54 Input No.53
~
~
GND +DC
RC420 Rev.9