Description of the signal inputs
23
Description of the signal inputs
Connecting the signal inputs
Only connect the signal inputs “Delete externally” and “Stop” to
volt-free contacts!
The connection of external voltages would damage the instrument!
DEL. EXT. (EXT. LÖSCH.) of relay K3
The input “Delete externally” is used for the external dele-
tion/acknowledgment of current errors/alarms. It reacts the same as
key 4 (horn) after a short press, i.e. all fault messages can also be
acknowledged via a remote control (normally open).
STOP
The input “Stop” is the input for an external flow controller or switch
(volt-free, normally open). It reacts the same as key 3 (standby) after
a short press. The LED above key 3 flashes and the instrument no
longer executes analyses. However, an analysis currently in progress
will be completed.
Priority of input STOP
The external stop function has priority over key 3 (standby)!
If the standby function (key 3) has been activated and subsequent-
ly deactivated during an analysis pause, the interval pause time is
reset. However, if the standby function is terminated via the “Stop”
input, the analysis starts immediately.
Interfaces
Current interface
The results of the analyses or statuses can be registered via the out-
put of the current interface (I-OUT (+) / I-IN (-)). The following defined
values for status and error messages are output for this:
5 mA = Pause
8 mA = Good measurement
11 mA = Poor measurement
14 mA = Low water level
17 mA = Low indicator level (< 10%)
20 mA = Indicator is empty or
optical fault or no or
insufficient indicator in the measuring chamber
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