Internal Equivalent Circuit Of I/O Circuit - GRAPHTEC gl820 User Manual

CHAPTER 2 Checks and Preparation

Internal equivalent circuit of I/O circuit

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