General-Purpose Outputs - Yamaha RCX142 User Manual

1. Standard I/O interface overview
c
CAUTION
• When an inductive load
(solenoid, relay, etc.) is used,
always connect a diode in
parallel as a surge killer.
• Never short the DO output to DC
24V (NPN specifications) since
this will damage the internal
circuitry.
• Never short the DO output to
GND (PNP specifications) since
this will damage the internal
circuitry.
• See "7. I/O connections" in
Chapter 3 for a definition of
NPN and PNP specifications.
6
6
6-
1.5.2

General-purpose outputs

NPN specifications
Photocoupler
(PS2801 or equivalent)
Controller side
PNP specifications
PNP Darlington transistor
(2SB1580 or equivalent)
Photocoupler
(PS2801 or equivalent)
Controller side
NPN Darlington transistor
(2SD2195 or equivalent)
DC24V
DO 20 to DO27
External power
supply DC 24V
GND
DC24V
External power
supply DC 24V
DO 20 to DO27
GND