Emerson IFT9701 instruction manual 4.3Connect power supply wiring, 1Power supply wiring terminals

Power Supply and Output Wiring continued

4.3Connect power supply wiring

CAUTION

Incorrect voltage, or installation with power supply on, could cause transmitter damage or failure.

•Match power supply voltage with voltage indicated on label in field wiring compartment.

•Shut off power before installing transmitter.

•Figure 4-1 shows the power supply wiring terminals.

•Wiring terminals accommodate 20 AWG (0,5 mm²) to 16 AWG (1,5 mm²) wire. If the transmitter has a DC power supply, see Table 4-1 for wire length and size guidelines.

•Connect power supply wiring to the power supply terminals.

•A switch may be installed in the power supply line. For compliance with low-voltage directive 73/23/EEC, a switch in close proximity to the transmitter is required.

•Do not install power cable in the same conduit or cable tray as flowmeter cable or output wiring.

•The transmitter must be grounded with a maximum impedance of 1 ohm. Either the internal ground screw or external case ground screw may be used as required by local policy or code.

Figure 4-1 Power supply wiring terminals

AC	OR	DC	Power
transmitter		transmitter
			terminals
N L		– +
85-250 VAC		20-30 VDC	Field wiring
			compartment

Conduit opening for

power supply wiring

Sensor wiring compartment

External ground screw for power supply

Internal ground screw for power supply

If national standards are not in effect, adhere to these guidelines for grounding:

•Use copper wire, 14 AWG (2,5 mm²) or larger wire size.

•Keep all ground leads as short as possible, less than 1 ohm impedance.

•Connect ground leads directly to earth, or follow plant standards.

•For hazardous area installation in Europe, use standard EN 60079-14 as a guideline.

20 Model IFT9701 Transmitter Instruction Manual