Communication; Control Loop - Ai0 And Transmitter Loop - Ao0 - Val Controls IHP24-A Hardware Manual

2 Communication

Several communication types are available as options.
2.1 Control loop – AI0 and Transmitter loop – AO0
Passive 4-20mA input and passive 4-20mA output.
Control loop – AI0
1
+
+
Active 4-20mA output
2.1.1 Terminals
AI0 1 (+)
2 (-)
AO0 3 (+)
4 (-)
2.1.2 Electrical specifications
Control loop – AI0
Impedance
Linearity
Temperature coefficient
HART (optional)
Galvanic isolated
Transmitter loop – AO0
Impedance
Linearity
Temperature coefficient
Galvanic isolated
Val Controls A/S • Sallingsundvej 5 • DK-6715 Esbjerg N • Tel. +45 7547 0600
DHW-UM-016
Revision: 1
2
-
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vc@valcontrols.com • www.valcontrols.com
< 470 Ohm at 20mA and 9.4VDC
< 0.1%
0.025% / 1°C (Warm-up: 10 min)
FSK, 1200Hz / 2200Hz 400-800mVpp
< 470 Ohm at 20mA and 9.4VDC
< 0.1%
0.015% / 1°C (Warm-up: 10 min)
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