Yokogawa 2-Wire Dual Channel Transmitter/Analyzer FLXA21 Manual de usuario descargar pdf (Pagina 4)

<1. Wiring and Installation>

IM 12A01A02-12E 4th Edition : Sep. 3, 2013-00

1.2 Wiring the power supply

FLXA21 is a 2-wire transmitter and can be powered by a DC power supply of max. 40 VDC. The

Power Supply voltage depends on:

• Theloadresistance:impedanceofelectronicequipment:typically250Ohm

• Numberofinputmodules:1-sensormeasurementor2-sensormeasurement.

One (1) Sensor module (1 input):

16 to 40 V DC (for pH/ORP, SC and DO)

17 to 40 V DC (for ISC)

21 to 40 V DC (SENCOM pH/ORP)

Two (2) Sensor modules (2 inputs):

22.8 to 40 V DC (for pH/ORP, SC and DO)

250

600

1000

24.718

V - 11.5

0.022

R =

1295

1617 22.8

4040

Voltage (V)

2-sensor measurement

Load resistance (Ω)

Digital Communication

Range (HART)

250

304

600

516

1000

24.7

V - 11.5

0.022

R =

1295

22.86

Except SENCOM

Voltage (V)

Load resistance (Ω)

Digital Communication

Range (HART)

18.2

Figure 1 Supply Voltage and Load Resistance for

pH/ORP (analog sensor), SC and DO

Figure 2 Supply Voltage and Load Resistance for

ISC and pH/ORP SENCOM sensor

Thepowersupplyisconnectedtotheterminalsmarkedwith+and–whichcorrespondswiththe

polarity of the DC power supply.Theshield/groundisconnectedtotheterminalmarked

then replace ground wiring cover.

1 2 3 4 5 6 7 8 9 ... 18 19

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Yokogawa 2-Wire Dual Channel Transmitter/Analyzer FLXA21 Manual de usuario Pagina 4

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