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Chapter 1 Product Overview
DMS-3K is an advanced distributed alarm management system that accepts a variety of digital and
analog inputs and provides outputs to remote Annunciator displays and other devices used for Alarm
Management. The DMS-3K provides advanced communication outputs via serial and Ethernet ports
using various non-proprietary protocols. Each DMS-3K product can work as a stand-alone system
monitoring up to 128 digital inputs or multiple DMS-3K units can be networked together to form a
larger system with all alarms consolidated to a single master unit for common output and display.
Features and Functions
Inputs
Each DMS-3K card rack can accommodate up to 128 digital contact inputs or 32 analog inputs (or
combinations of both digital and analog). In addition, there are up to 64 control inputs which can be
assigned as functions to test, acknowledge, reset the lamp displays or inhibit specific inputs. Up to 16
card racks can be combined to form a system with maximum capacity of 2,048 digital inputs or 512
analog inputs (or combinations of both).
Outputs
Each DMS-3K card rack can accommodate up to 240 outputs which can consist of relay contacts or
solid state outputs. The outputs can be used to drive a remote Annunciator display, retransmit an
alarm input or group of inputs, and connect to a horn or other device.
Annunciator Logic
The DMS-3K system has logic to assign how an input or group of inputs drives an output. This is
used to assign an input or group of inputs to an Annunciator window, retransmit relay, alarm horn,
common alarm relay etc. The logic can be used with AND / OR functions to group multiple inputs to a
single output. In addition, you can apply 'Voting Logic' which will require scenarios like 2 of 3 or 3 of 4
inputs in alarm before activating an output. The Logic is also used to assign the control pushbuttons
(Test, Acknowledge, Reset, etc) to specific groups of inputs. All logic is confined to I/O contained in a
single Logic Card Rack.
Sequence of Events Recording (SER)
The DMS-3K provides timestamping of alarms to the millisecond for quick determination of root cause
and verification that control systems responded in an appropriate manner. Up to 40,000 events per
Logic Card Rack are stored in non-volatile RAM.
Power Supply Options
The DMS-3K logic card rack has a built in power supply regulator for 24VDC and 48VDC power
inputs. These regulators can provide a non-isolated 24 VDC or 48 VDC field contact voltage for
wetting the 'dry' field contact inputs. The regulators can also connect to an isolated external field
contact voltage supply of 24, 48 or 125 VDC for distribution to field inputs. Other input power options
(125VDC, 120/240VAC) are available through external power supplies which can be provided in a
redundant fashion, or different voltages for the Primary Power and Back Up Power.
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