Power Supply Requirements; Operating Voltages And Cable Lengths - ABB NGC8200 User Manual

The example shows the analyzer's power terminal (J1) wired to the isolated 12 Vdc power supply.
Refer to this figure when reviewing the following sections.
Figure 5-1: Example of analyzer wiring
5.2.1

Power supply requirements

Review the following requirements before powering the analyzer. Also see
specifications.
 The power supply for the analyzer should have an isolated output (the negative side of the 12
or 24 VDC output should not be electrically connected to any chassis or external earth
ground).
 Power supplies should meet or exceed the operating voltage requirements per analytical head
(see Table 2-1).
 In some instances, the power supply is installed in conjunction with a radio. If the radio is
connected to the analyzer via RS-232/485/422, the communications should share the power
ground. The communication shield should only be connected at the analyzer end. The other
end should be left to float (left unconnected, see
5.2.2

Operating voltages and cable lengths

The analyzer is designed for connection to a 12 VDC or 24 VDC power source. The 12 volt power
source must provide a minimum of 10.5 VDC to a maximum of 16 VDC at 4 amps minimum; and the
24 volt must provide a minimum of 21 VDC to a maximum of 28 VDC at 2.2 amps. The configurations
with the auxiliary feed-through heater increase the requirements.
Adequate wire gauge to connect the analyzer to the DC power supply depends on the distance
between the two. Wire gauge and length affects the voltage delivered to the analyzer. Voltage drop
across the wiring should be minimized.
gauge values.
IMPORTANT NOTE: Additional devices connected to the analyzer and requiring power (XMVs,
radios, etc.) must be factored into this calculation. Refer to the technical specifications to compute
cable requirements for additional loads. For non-standard applications or other questions, contact
Technical Support (see contact information on the last page of this manual).
Figure
Table 5-2 shows the recommended wire lengths for different
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Table 2-1: Analyzer
5-1).