User Manual

Chapter 1
Chapter 1 Introduction 1
-3
The command set for input modules is larger because it incorporates
alarm funct ions. All com munications t o and from t he m odule are
performed i n ASC II, which m eans t hat A DAM m odules ca n be
virtually programmed in any high-level language.
RS-485 Network
The RS-4 85 network provides l ower-noise sensor readings, as
modules can be placed m uch closer to the source. Up to 256 ADAM
modules may be connected to an RS-485 multi-drop network by using
the ADAM RS-485 re peater which ex tends the maximum
communication distance up to 4,000 ft. The host computer is connected
to the RS-485 network with one of its COM ports through the ADAM-
452x module (RS-232 to RS-422/485 converter).
To boost the network’s throughput, ADAM RS-485 repeater uses a
logical R TS si gnal t o m anage t he re peater’s di rection. The o nly t wo
wires that are needed for the RS-485 network, DATA+ and DATA-, are
inexpensive shielded twisted pair.
Panel/DIN Rail mounting