Expansion; Active Analogue Output - Ao1, Ao2 And Digital Inputs - Di5, Di6 - Val Controls I 24-AF Series Hardware Manual

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.
Active AO
+ -
+ -
A
Passive 4-20mA input
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
Linearity
Temperature coefficient
DI – Switch
Type
Cable length
Maximum cable resistance
DI – NAMUR
Type
Sensor supply voltage
Cable length
Max load
Rin
Val Controls A/S • Sallingsundvej 5 • DK-6715 Esbjerg N • Tel. +45 7547 0600
DHW-UM-004
Revision: 4
DI
-
+
-
+
Switch
550 Ohm at 20mA and 20.4VDC PS2 supply
< 0.1%
0.015% / 1°C (Warm-up: 10 min)
Switch
20 meters
100 Ohm
NAMUR
8 V
1000 meters
600 Ohm
1040 Ohm
vc@valcontrols.com • www.valcontrols.com
DI
-
+
-
+
NAMUR
15/20