Specifications

Publication 1747-SG001E-EN-E - February 2013

58 Select Network Communications

Data Highway Plus (DH+)

Network

The DH+ network is a local area network designed to support remote programming and

data acquisition for factory-floor applications. You can also use DH+ communication

modules to implement a peer-to-peer network.

The DH+ network supports daisy-chain and trunkline-dropline configurations. The

number of supported devices on a DH+ link and the maximum length of the cable

depends on the communication rate.

The table below shows the maximum cable lengths, communication rates and associated

termination resistor sizes for the DH+ network.

Data Highway Plus connectivity for the SLC 500 is provided by the SLC 5/04 processor.

See page 63 for more information on the SLC 5/04.

DH+ Network Specifications

Baud Rate Maximum Cable

Distance

Terminating Resistor Size

57.6 K baud 3048 m (10,000 ft) 150 Ω

115 K baud 1542 m (5000 ft) 150 Ω

230.4 K baud 762 m (2500 ft) 82 Ω

DH+ Network

PC with 1784-PKTX

or -PKTXD

PLC-5 Controller

with 1785-KA5

SLC 5/04

1747-NET-AIC

Module

1747-AIC Module

1747-AIC

Module

SLC 5/02 Controller SLC 5/03 Controller