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Tree Tech DM Series Networked I/O Modules
The DM series of networked data acquisition and control
modules interface to digital systems with any analog or
electromechanical equipment that does not have a serial port and
needs to be supervised or controlled.
Three models are available, and each model can be ordered with 8,
16, or 24 I/O points:
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DM1
for the supervision of dry contact inputs
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DM2
for the supervision of analog signal inputs
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DM3
with output contacts for load switching
Functions and Characteristics:
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Communication
with a remote data acquisition and control system through the
RS-485 serial interface, with Modbus RTU protocol
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Remote
monitoring of the status of dry contacts (alarms, trips,
signalization, and contact actuation time-counting)
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Remote
measurement of analog signals (outputs of transducers, gas
monitors, levels, etc.).
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Remote
activation of potential-free output contacts (on/off motors,
lamps, etc.)
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Up
to 31 DM Series modules can be connected to the same
communication network
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Communication
distance up to 1,300 meters, measured between the extreme points
of the network.
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Digital
and analog input circuits, output contacts, and RS-485 interface
with galvanic insulation.
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Interconnection
of DM's through a twisted pair cable or optional fiber optic
cable using a RS-485 to fiber converter
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