Micro Motion RFT9709 Manual de instrucciones descargar pdf (Pagina 25)

RFT9709 Transmitter Instruction Manual

Wiring

continued

Wiring Startup TroubleshootingBefore You Begin Mounting

2.4 Output wiring

Output wiring terminal designations are described in Table 2-2. Output

functions and wiring are described in detail through page 25. Follow

these general guidelines for output wiring:

• Use individually shielded pairs of 22 AWG (0.3 mm²) or larger wires for

connections between the RFT9709 and any peripheral device.

• Maximum wire length between the RFT9709 and any peripheral device

is 500 feet for 22 AWG wire (150 meters for 0.3 mm² wire), 50 feet for

28 AWG wire (15 meters for 0.1 mm² wire).

• Shields and/or drain wires must be terminated at the RFT9709 (see

Figure 2-9) or at the peripheral device.

Table 2-2.

Output-wiring terminal

designations

Figure 2-9.

Terminating output-wiring

shields and drains

WARNING

Failure to comply with requirements for intrinsic

safety in a hazardous area could result in an

explosion.

Output wiring is not intrinsically safe.

• Keep output wiring separated from power-supply wiring

and intrinsically safe sensor wiring.

• Follow all output wiring instructions to ensure the

RFT9709 and any connected devices will operate

correctly.

Terminals Function

11 and 12 Primary variable (PV) mA output

13 and 14 Secondary variable (SV) mA output

15 and 16 RS-485 I/O

17 and 18 Frequency/pulse output

19 and 18 Control output

20 and 18 Remote zero input

21 and 22 Pressure transmitter (or DP cell)

Terminate shields and/or drain wires at

mounting boss or ground nut, or

terminate them at peripheral device.

Mounting boss

#6-32 ground nut

09wire.fm Page 17 Monday, March 1, 1999 4:31 PM

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Micro Motion RFT9709 Manual de instrucciones Pagina 25

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