GRAPHTEC midi LOGGER HV User Manual page 29

Internal equivalent circuit of I/O circuit
•
Alarm output
+5 V
10 kΩ
2SC2411K
•
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 0 kΩ
10kΩ
33kΩ
+ 5V
10kΩ
10kΩ
: 30 V
: 0 .5A
: 0 .2W
Required for an inductive
load such as a relay
DC
(5 to 24V)
+ 5V
Comparator
1kΩ
+ 5 V
1kΩ
CHAPTER 2 Checks and Preparation
Comparator
2-13