GRAPHTEC GLT400 User Manual page 45

Internal equivalent circuit of I/O circuit
•
Alarm output
+ 5 V
10 K Ω
2SCR553R
•
Logic/pulse input
LOGIC/PULSE
GND
•
Trigger input/external sampling input
TRIGGER/SAMPLE
GND
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.
Example of external connection
ALARM
Load
GND
+ 5V
1 0K Ω
68 K Ω
22 0K Ω
+ 5V
10 K Ω
6 8 K Ω
: 50 V
: 2 A
: 0.3 W
Required for an inductive
load such as a relay
DC
(5 to 24 V)
+5 V
Comparator
+ 5 V
22 0K Ω
0. 0 1μF
CHAPTER 2 Checks and Preparation
Comparator
2-25