Val Controls I 24-AF Series - Expansion; Active Analogue Output - AO1, AO2 and Digital Inputs - DI5, DI6

DHW-UM-004
Val Controls A/S • Sallingsundvej 5 • DK-6715 Esbjerg N • Tel. +45 7547 0600
vc@valcontrols.com • www.valcontrols.com
Revision: 4
15/20
5 Expansion
The expansion terminals have different function depending on which expansion module is installed.
5.1 Active analogue output – AO1, AO2 and Digital inputs – DI5, DI6
Use the two analogue outputs to connect 4-20mA loop inputs e.g. proportional valves.
Passive 4-20mA input
-
Active AO
+
A
+
-
DI
+
-
Switch
+
-
DI
+
-
NAMUR
+
-
5.1.1 Terminals
AO1
21 (+)
22 (-)
AO2
23 (+)
24 (-)
DI5
51 (+)
52 (-)
DI6
25 (-)
26 (+)
5.1.2 Electrical specifications
AO1 – AO2 – Active analogue output
Max load
550 Ohm at 20mA and 20.4VDC PS2 supply
Linearity
< 0.1%
Temperature coefficient
0.015% / 1°C (Warm-up: 10 min)
DI – Switch
Type
Switch
Cable length
20 meters
Maximum cable resistance
100 Ohm
DI – NAMUR
Type
NAMUR
Sensor supply voltage
8 V
Cable length
1000 meters
Max load
600 Ohm
Rin
1040 Ohm