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Emerson Network Router User Manual

Page 19

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Installation and Use Manual

13

Installation and Setup

Pr
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k II

Setup

T

ransmitter Star

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Usi

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Begin

Figure 2-4

HART/Bell 202 connection to Model 1700/2700 I.S. transmitters

+

VIA

TOR

VIA

TOR

or

+

DCS or

PLC

R2

R3

R1

Primary mA output terminals

Transmitter

External power supply

USB plug

Notes:
• Connect the HART interface leads to the primary mA output of the transmitter, or to any point on the network.
• If necessary, use any combination of R1, R2, and R3 to bring the total resistance within 250–600

Ω.

• If no other device is connected to the primary mA output, add R1.
• If the primary mA is connected to a DCS or PLC with R2:

• Where R2 is insufficient, add R1 to bring R1+R2 into range.
• Where R2 is absent, add R3.

Bell 202 signal

converter