Emerson 1700, 2700 DC power requirements, 1Typical power cable resistances at 68 F 20 C

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Installing the Transmitter

DC power requirements

Note: These requirements assume a single transmitter per cable. Connecting multiple transmitters to a single cable should be avoided.

If you are using DC power, the following requirements apply:

•18–100 VDC

•6 watts typical, 11 watts maximum

•At startup, the transmitter power source must provide a minimum of 1.5 amps of short-term current per transmitter.

•Length and conductor diameter of the power cable must be sized to provide 18 VDC minimum at the power terminals, at a load current of 0.5 amps. To size the cable, refer to Table 2-1and use the following formula as a guideline:

MinimumSupplyVoltage = 18V + (CableResistance ⋅ CableLength ⋅ 0.5 A)

Table 2-1Typical power cable resistances at 68 °F (20 °C)

Gauge	Resistance(1)

14 AWG	0.0050	Ω/foot

16 AWG	0.0080	Ω/foot

18 AWG	0.0128	Ω/foot

20 AWG	0.0204	Ω/foot

2,5 mm2	0,0136	Ω/meter

1,5 mm2	0,0228	Ω/meter

1 mm2	0,0340	Ω/meter

0,75 mm2	0,0460	Ω/meter

0,5 mm2	0,0680	Ω/meter

(1) These values include the resistance of both high and low conductors in a cable.

Example The transmitter is mounted 350 feet from a DC power supply. If you want to use 16 AWG

cable, calculate the required voltage at the DC power supply as follows:

MinimumSupplyVoltage = 18V + (CableResistance ⋅ CableLength ⋅ 0.5A)

MinimumSupplyVoltage = 18V + (0.0080 ohms/ft ⋅ 350 ft ⋅ 0.5A)

MinimumSupplyVoltage = 19.4V

8	Micro Motion® Model 1700 and 2700 Transmitters

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Contents Micro Motion Model 1700 Model 2700 Transmitters Page Contents Index Safety Before You BeginOverview Flowmeter components Transmitter installation procedures Flowmeter documentation 1Flowmeter documentation resourcesMicro Motion customer service Installing the Transmitter Installation architecture1Installation types Temperature limits Power sourceAC power requirements Determining an appropriate locationDC power requirements 1Typical power cable resistances at 68 F 20 CAccessibility for maintenance Maximum cable lengths2Maximum cable lengths Mounting the transmitterIntegral installations 2Rotating the transmitter34-wire remote Wall mount or pipe mount 3 9-wire remote installations 59-wire remote Wall mount or pipe mount6Transmitter/core processor assembly Exploded view Mounting the remote core processor7Remote core processor Wall mount or pipe mount Grounding the flowmeter components 3Grounding methods for flowmeter componentsSupplying power Rotating the displayInstalling the Transmitter 10Display components Wiring the Transmitter to the Sensor Cable types1 4-wire cable 2 9-wire cableWiring for 4-wire remote installations 3Wiring to the mating connector Wiring for 9-wire remote installations Core processor on transmitterSubtask 1 Wire the remote core processor to the transmitter 5Cable glands 7Wrapping the shield drain wires 10Gland body and core processor housing Subtask 2 Wiring the sensor to the remote core processor 129-wire cable between sensor and core processorWiring the Transmitter to the Sensor Output Wiring Model 1700/2700 Analog Transmitters Output wiringOutput terminals and output types 1Terminals and output types1Basic analog wiring 2HART/analog single-loop wiring Smart Family Output Wiring Intrinsically Safe Safe area output wiring Safe area mA output wiring2Safe area mA output load resistance values Safe area frequency/discrete output wiring 5Safe area frequency/discrete output wiringHazardous area output wiring Hazardous area safety parameters2Safety parameters Hazardous area voltageHazardous area current Hazardous area capacitanceHazardous area mA output wiring Hazardous area frequency/discrete output wiringHazardous area Output Wiring Model 2700 Configurable I/O Transmitters Channel configuration1Channel configuration MA output wiring2Basic mA wiring Frequency output wiring 5Frequency output Terminals 3 & 4 Channel B Internal power 7Frequency output Terminals 5 & 6 Channel C Internal power Discrete output wiring 9Discrete output 1 Terminals 3 & 4 Channel B Internal power11Discrete output 2 Terminals 5 & 6 Channel C Internal power Volts Voltage Output Level High Discrete input wiring 2Input voltage ranges for external power16Discrete input Terminals 5 & 6 Channel C Internal power Micro Motion Model 1700 and 2700 Transmitters Foundation fieldbus wiring 1Connecting the fieldbus communication wiresPROFIBUS-PA wiring 2Connecting the PROFIBUS-PA communication wiresSpecifications Functional specificationsPower connection Service port connectionInput/output signals Input signal from sensor Core processor connectionFisco and Fnico approval Specifications Operating Absolute minimum = 100 Ohms for V supply 25.6 volts Specifications Service port Digital communicationHART/Bell202 Foundation fieldbus or PROFIBUS-PA transmittersPower supply Environmental requirements Ambient temperature limitsAmbient temperature effect EMC complianceUL and CSA TransmitterOutputs Atex and IECExPerformance specifications Physical specificationsHousing MountingWeight DimensionsInterface/display Dimensions in inchesmm Inches Dimensions in mm Or M20 × 11/16 160 13/16 139 ″-14 NPT 158 182 × Ø3/8 13/16 148 15/16 × 1/2″-14 NPT Figure A-5Dimensions Remote core processor Index AtexRemote core processor with remote Index Micro Motion Model 1700 and 2700 Transmitters Page 20001700