Metrohm 765 Dosimat - Manual (Page 51)

4.4 Pin assignment of the RS232 / I/O socket
765 Dosimat
47
t
p
ca. 200 us
t
p
ca.150 ms
t
p
t
p
t
p
≥ 1 ms
t
p
t
p
≥ 1 ms
t
p
4.4 Pin assignment of the RS232 / I/O socket
4.4.1 I/O socket, 25 pins
external Function
A18
A16
A9
A7
A17
A20
A6
A21
A11
A8
A3
A4/5
A2
Ready = L
V
CE
= 30 V, I
C
= 20 mA
Limit volume reached = L
V
CE
= 30 V, I
C
= 20 mA
Job end
V
CE
= 30 V, I
C
= 20 mA
Pulses (10000).
Appear with feed only.
V
CE
= 30 V, I
C
= 20 mA
Fill = L; during filling
Feed = L; during dosing
Change to step operation = L. 1 Dosing pulse on
A20 triggers 1/10000 of buret volume.
V
IL
≤ 0.4 V
V
IH
≥ 2 V
I
IL
≤ 0.6 mA
0 mV ... 1000 mV
I
L
≤ 5 mA
Analog Ground
I
L
≤ 30 mA
I
L
≤ 80 mA
I
L
≤ 30 mA
+5 V
+5 V
+5 V
0 V
+12 V
+5 V
-12 V