Hart Connections - Presys PCA-570-RM Technical Manual

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2.5.1. HART connections
45
When you select HART
(INCLUDING NETWORK) on the screen. The internal resistor (250 Ω) can also be enabled or not. The option must
be chosen according to the type of connection that will be made.
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a) mA + HART INPUT (Calibrator in series with the transmitter)
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from the main menu, you will see mA INPUT + HART and HART ONLY
Fig. 31 - Transmitter powered by the calibrator's own TPS
mA + HART® input (Internal resistor enabled)