Installation
Document No. D113-015
Page 9 of 77
Revision 1.9
2.3.
POWER
A three-way power connector is used to connect Power+, Power– (ground), and earth. The
module requires an input voltage of 12 – 28Vdc.
Refer
to the technical specifications section
in this document.
Figure 2.5 - Power connector
2.4.
ANALOG (HART)
The Analog HART channels are connected using a two-way connector. The input channels (A-
HRT-4I) are internally loop powered and therefore can be connected directly to the field
device signal terminals.
The output channels (A-HRT-4O) source the current directly and therefore can also be
connected directly to the field device signal terminals. The input and output channels provide
internal current limiting and electronic fuse protection.
Figure 2.6 – Analog (HART) Connection to Field Device
The equivalent Analog Input and Output circuits are shown below.