4-20Ma Input - Ai1; Terminals; Electrical Specifications - Val Controls I 24-BF Series Hardware Manual

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

3.2.1 Terminals

Passive sensor
AI1 11 (+)
12 (-)

3.2.2 Electrical specifications

AI – Analogue inputs
External loop max Rload
Operating area
Minimum span
Cable length
Linearity
Temperature coefficient
Rin
Val Controls A/S • Sallingsundvej 5 • DK-6715 Esbjerg N • Tel. +45 7547 0600
DHW-UM-003
Revision: 6
AI
+
+
Active loop
Active sensor
12 (+)
6 (-)
820 Ohm at 20mA and 16.4VDC
4 – 20mA
12mA
1000 meters
< 0.1%
0.01% / 1°C (Warm-up: 10 min)
< 100 Ohm
vc@valcontrols.com • www.valcontrols.com
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