Rockwell Automation 1758-RTU202 Datasite Installation Instructions - Manual (Page 14)

14 DataSite Natural Gas Flow Meter and Remote Terminal Unit
Publication 1758-IN001C-EN-P - June 2011
Wiring for RS485 Serial Communications
Wire the Controller for HART Communication
The controller comes with three HART protocol communications ports, including one that is
multi-point, and can connect to thirteen HART protocol meters. The other two are
point-to-point ports, and can also collect 4…20 mA signals.
HART0 multi-point port wiring to passive meters
Master
Station
First station in network
requires terminations
Last station in network
requires terminations
RS-485 network
1200 m (4000 feet)
maximum length
D
D
Slave
Station
D
D
Slave
Station
D
D
44390
HO+
DC Power
Supply
HO-
Two Wire
Slave #13 Two Wire
Slave #2
Two Wire
Slave #1
44391