Chapter 1
Chapter 1 Introduction 1
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The command set for input modules is larger because it incorporates
alarm functions. All communications to and from the module are
performed in ASCII, which means that ADAM modules can be
virtually programmed in any high-level language.
RS-485 Network
The RS-485 network provides lower-noise sensor readings, as
modules can be placed much 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 repeater which extends 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 RTS signal to manage the repeater’s direction. The only two
wires that are needed for the RS-485 network, DATA+ and DATA-, are
inexpensive shielded twisted pair.
Panel/DIN Rail mounting