3.14 Connecting to power
Figure 3-22: 24 Vdc power source wiring
A. 24 Vdc power wiring input
3.14.1 Wiring power source
• Ensure that all wiring, as well as the customer-provided circuit breaker or power
disconnect switch locations, conform to all the standards: national, local, state, and
other jurisdictions.
• Provide the gas chromatograph (GC) with a 5-amp circuit breaker for protection.
• The Rosemount 470XA requires at least 21 Vdc at the terminals on the backplane to
operate correctly. When wiring for DC power connections, account for the voltage drop
due to the cable's resistance.
WARNING
To enable servicing in a potentially flammable or explosive atmosphere, install an electrical
power cut-off on the GC power connection outside of the hazardous area.
Installation Manual
June2023 MS-00809-0100-0470
54 Emerson.com
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