GRAPHTEC GL820 - Internal Equivalent Circuit of I;O Circuit

2−8
CHAPTER 2 Checks and Preparation
Internal equivalent circuit of I/O circuit
● Alarm output
Maximum ratings of the transistor for alarm output
VCEO (Collector-emitter voltage) : 30 V
IC (Collector current) : 0.5 A
PC (Collector dissipation) : 0.2 W
* The maximum ratings must not be exceeded.
Example of external
connection
Required for an
inductive load such
as a relay
Load
DC
(5 to 24V)
+5V
10K
2SC2411K
GND
ALARM
● Logic/pulse input
+5V +5V
100K Ω
68K Ω
220KΩ
LOGIC/PULSE
GND
Comparator
● Trigger input/external sampling input
Comparator
+5V
+5V
100KΩ
68KΩ
220KΩ
0.01µF
GND
TRIGGER/SAMPLE