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Power Supply
The power supply of the Polaris is derived from the phase A voltage. To provide additional protection for the Polaris, a
0.5A/250V fuse should be placed between the Polaris and the power source as shown in each of the electrical wiring
diagrams.
Using a Regular 5A Output CT
For installations with pre-existing CTs or if larger capacities is required, the user should choose the dedicated 5A CT
and connect the user provided CT to the dedicated 5A CT as shown in the diagram below.
Connecting with a Regular 5A Output CT Wiring Diagram
CT
+
–
Source
Standard CT 1000A:5A
RS485 Installation
The RS485 can be optionally equipped with an RS485 communication port. This port can be used for connecting with
PC for remote reading.
Multiple Polaris units can be connected to the same RS485 network. All the positive terminals are to be connected
together using the same red conductor, and all the negative terminals are to be connected together to the same blue
wire. The shielding wire should be grounded to the panel or enclosure.
When connecting as a network, the RS485 wires should be daisy chained as shown in the diagram, it should not be
branched off or looped.
Since most modern computers have no built in RS485, a converter is necessary to convert the RS485 signals into
something the host computer can understand. Typically this converter can either be an RS485 to RS232 converter, with
the host computer needing to have built in RS232 port or expansion card; or for some computers with no expansion such
as a notebook computer, an alternative would be to use a commercially available RS485 to Ethernet converter.
Polaris Userʼs Manual 1.3e"
Dedicated CT 5A:mA
Load
5/11
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