Knauer Azura DAD 2.1L Benutzerhandbuch Seite 26

27 Installation
Connection
Error IN
Start IN
Autozero
+5 V
GND
+24 V Valve
Valve OUT
GND
KNAUER DAD 6.1L, DAD 2.1L, MWD 2.1L User Manual V6700, Version 1.0
Function
TTL input

Low active
Secure switching threshold at least
10 mA
After receiving a signal (short-circuit to
ground) from an external device, an
error message appears and the device
stops.
TTL input

Low active
Secure switching threshold at least
10 mA
After receiving a signal (short-circuit to
ground) from an external device, the
device starts. If controlled with soft-
ware, an electronic trigger is send
through the LAN.
TTL input

Low active
Secure switching threshold at least
10 mA
A signal (short-circuit to ground) sets
the measuring signal to zero.
Provides a voltage of 5 V with respect
to GND. This makes it possible to sup-
ply a load that is switched by an
EVENT. 
Protection: 5 V-50 mA
Reference point of the voltage at the
signal inputs.
Event-controlled switching of 24 V
against GND 
Protection: 24 V-200 mA
Output is active until the valve condi-
tion has been eliminated.
Reference point of the voltage at the
signal inputs.