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Interface 20 mA current loop active

   20mA aktiv   

   20mA aktiv   


Functional block diagram and brief description

Bild 20mA
20 mA current loop active

Active 20-mA current loop to connect to a pc.

The module can be delivered as a passive interface.

The In- and Outputs are not galvanicaly separated.

The cable lenght must be less than 1 km.
Multiple users per segment are allowed.




Pin assignment

Pin assignment 20mA aktiv



TTL/CMOS pin assignment (links)
 
    Pin           Name      
1
-
NC
2
-
NC
3
TxD
Input
4
RxD
Output
5
GND
 
6
VCC1
+ 5V
7
VCC2
+ 12V
Pin assignment (rechts)
 
    Pin           Name      
1
-
NA
2
-
NA
3
A
+
4
B
NC =  not connected  =  nicht angeschlossen
NA = not available  = nicht vorhanden



Recommended operating conditions and electrical characteristics

Galvanic separation of In- and Outputs     no
 
Input Voltage UEIN mind. 3 V
Input Current IEIN typ. 10 mA
Output Voltage UAUS max. 12 V
Supply Voltage VCC1 typ. 5 V
Supply Voltage VCC2 typ. 12 V



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Last Update 22.06.2007 at 11:43:35.