Manual De Usuario Emerson Enrutador De Red Network Router [27/110 Páginas]

Emerson enrutador de red Network Router

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Installation and Use Manual 21

Installation and Setup

ProLink II Setup Transmitter StartupUsing ProLink IIBefore You Begin

3. For long-distance communication, or if noise from an external source interferes with the

signal, install 120-Ω, 1/2-watt resistors (R1) across terminals of both end devices.

Note: The Modbus protocol allows only one Modbus master to be active on the network at any given

time. If you are connecting through a network, ensure that no other Modbus master devices are

currently active.

Figure 2-7 Modbus/RS-485 connection to RS-485 multidrop network

Table 2-10 Lead-to-terminal assignments – Method 6

Transmitter

Terminals

RS-485/A RS-485/B

Model 1500/2500 33 34

Model 1700/2700 AN 5 6

Series 3000 panel-mount with screw-type connectors a32 c32

Series 3000 panel-mount with I/O cables 25 24

Series 3000 rack-mount a32 c32

Series 3000 field-mount 12 11

RFT9712 21 22

RFT9739 field-mount 27 26

RFT9739 rack-mount Z22 D22

DCS or

PLC

See Step 3

BLACK

BOX

25-pin to 9-pin serial port adapter

(if necessary) (not shown)

RS-485 terminals

See Step 2

Tra n sm itt er

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