Product data

Publication 1785-SG001B-EN-P - June 2006
Select Network Communications 29
Data Highway Plus
The Data Highway Plus (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
small peer-to-peer network.
You can use a DH+ network for data transfer to other PLC-5 controllers or
high-level computers and as a link for programming multiple PLC-5
controllers. A PLC-5 controller can communicate over a DH+ network with
other controllers and with a workstation.
The DH+ network supports daisy-chain and trunkline-dropline
configurations.
ControlLogix Chassis with
1756-DHRIO Module
SLC-5/04 Controller
Workstation
Workstation with
RSLogix 5 Software
PLC-5 ControllerPLC-5 Controller
Data Highway Plus
Cat. No. Function Comm.
Rate
Connections Design Considerations Cable Power
Dissipation,
Max
Backplane
Current
Load
1785-KA Provides an interface
between Data Highway
Plus and Data
Highway-485 link
DH+ 57 Kbps
DH-485
configurable
DH+
DH-485
Place in the local chassis Data Highway
1770-CD
RS-232
1770-CG or
Modem
Interface Cable
1770-CP
10.5 W 2.0 A
1785-KE Provides an interface
between Data Highway
Plus and RS-232-C link
DH+ 57 Kbps
RS-232-C
configurable
DH+
RS-232-C
Place in the local chassis Data Highway
1770-CD
RS-232
1770-CG or
Modem
Interface Cable
1770-CP
6.3 W 1.2 A