Rockwell Automation 2706-LV2P_LV2R_LV4P_LV4R DL40 PLUS USER MANUAL - Manual (Page 142)

Installation and Wiring 9–13
Publication 2706-6.1
When the RS-485 port is configured for DL Slaves, you can connect
one DL40 Plus master to one or multiple slave message displays.
The slave displays may be any combination of DL40 Plus displays,
DL50 Marquee displays, or equivalent devices compatible with the
Allen-Bradley slave protocol. The RS-485 network link supports
multi-drop communications with up to 126 slave displays. Use
Belden 9842 cable at a maximum length of 4,000 ft (1219 meters).
The following diagram shows a typical Dataliner DL40 Plus RS-485
network with one master DL40 Plus display communicating with
multiple slave displays.
COM
Belden 9842 Cable
Recommended
CH. A
CH. B
To Host Controller
To Next Node
Shield
COM
CH. A
CH. B
Shield
COM
CH. A
CH. B
Twisted Pair
User installed jumper at first
and last DL40 Plus (physical
location) on the RS-485 link.
User installed jumper at any
one node only on the RS-485 link
User installed jumper at first
and last DL40 Plus (physical
location) on the RS-485 link.
DL40 Plus RS-485 Network Master
DL40 Plus Slave Display
Shield
COM
CH. A
CH. B
User installed jumper at first
and last DL40 Plus (physical
location) on the RS-485 link.
A-B
DL50 Marquee Display Configured
for SIMPLEX Mode
RS-485
1 - E GND 2 - SHLD 3 - COMM 4 - CH A 5 - CH B 6 - TERM
RS-485
1 - E GND 2 - SHLD 3 - COMM 4 - CH A 5 - CH B 6 - TERM
RS-485
1 - E GND 2 - SHLD 3 - COMM 4 - CH A 5 - CH B 6 - TERM
Connecting DL Slaves
to the RS-485 Port