Pin Assignment Of The Rs232/Analog Output Socket; Analog Output, 25 Pin Socket - Metrohm 765 Dosimat Instrucciones Para El Uso

4.4 Pin assignment of the RS232 / I/O socket
4.4.1 I/O socket, 25 pins
+5 V
+5 V
+5 V
+12 V
+5 V
0 V
-12 V
765 Dosimat
4.4 Pin assignment of the RS232 / I/O socket
external
A18 Ready = L
V = 30 V, I
CE
A16 Limit volume reached = L
V = 30 V, I
CE
A9 Job end
V = 30 V, I
CE
Pulses (10000).
A7
Appear with feed only.
V = 30 V, I
CE
A17
Fill = L; during filling
A20
Feed = L; during dosing
Change to step operation = L. 1 Dosing pulse on
A6
A20 triggers 1/10000 of buret volume.
≤ 0.4 V
V
IL
≥ 2 V
V
IH
≤ 0.6 mA
I
IL
0 mV ... 1000 mV
A21
≤ 5 mA
I
L
A11
Analog Ground
≤ 30 mA
I
A8
L
≤ 80 mA
I
A3
L
A4/5
≤ 30 mA
I
A2
L
Function
= 20 mA
C
= 20 mA
C
= 20 mA
C
= 20 mA
C
t
t ca.150 ms
p
p
t
t ca. 200 us
p
p
t
≥ 1 ms
t
p
p
t
≥ 1 ms
t
p
p
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