DHW-UM-003
Val Controls A/S
•
Sallingsundvej 5
•
DK-6715 Esbjerg N
•
Tel. +45 7547 0600
•
www.valcontrols.com
Revision: 6
8/13
3.2
4-20mA input – AI1
The analogue inputs can be used to connect passive 4-20mA sensors to the device or in the
alternative configuration active 4-20mA sensors.
AI
Passive loop
Active loop
+
-
-
AI
+
+
-
+
-
3.2.1
Terminals
Passive sensor
Active sensor
AI1
11 (+)
12 (-)
12 (+)
6 (-)
3.2.2
Electrical specifications
AI – Analogue inputs
External loop max Rload
820 Ohm at 20mA and 16.4VDC
Operating area
4 – 20mA
Minimum span
12mA
Cable length
1000 meters
Linearity
< 0.1%
Temperature coefficient
0.01% / 1
°
C (Warm-up: 10 min)
Rin
< 100 Ohm
