Littelfuse M3000 User Manual

Alarm Monitoring

14

12

13

11

INPUT
GROUP 1

IN 1

IN 2

IN 3

GND

84

82

83

81

INPUT
GROUP 8

IN 1

IN 2

IN 3

GND

101

114

120

11 5

11 6

121

122

130

131

132

–

+

M3000

(Analog Alarm
Annunciator)

24 V

DIM

AL. OUT

SIREN

B

A

COM

RS485

RS232

OPEN

COLLECTOR

OUTPUTS

Monitoring

M3000 SERIES

Analog Alarm Annunciator

Description

The M3000 Analog Alarm Annunciator has 24 inputs that can
be configured individually for dry contact (NO or NC) inputs or
analog inputs. Analog inputs can read measurements through
4-20 mA, 0-10 Vdc or 0-24 Vdc transmitters. Up to 48 alarms
can be configured with individual reference to any of the 24
inputs. An alarm is activated and indicated when the input
value exceeds a preset critical low or high level. The alarm can
be related to any of the 24 LEDs and any of the 14 outputs.
Several alarms may activate the same LED and/or output. The
M3000 has a common alarm output, a siren output, as well as
dedicated inputs for remote reset and blocking.

Simplified Circuit Diagram

Features & Benefits

FEATURES BENEFITS

24 inputs One unit for both, digital and analog sensors

48 alarms

Programmable
10-character LCD text

24 LEDs with
indication of new and
acknowledged alarms.

14 open
collector outputs

RS485 interface For field-bus communication with PLC or HMI

RS232 link

Ordering Information

ORDERING NUMBER CONTROL POWER

M3000.0010 24 Vdc

ACCESSORIES REQUIREMENT

M1500 24 Vdc

www.littelfuse.com/m3000

Individual refer ence to any of the 24 inp uts allows
easy configuration of gr oup and individual alar ms

Each alarm is indicated as clear text

First incoming alarm can be identified easily

Provide ON/OFF control and simple connection to
remote displays

Allows easy programming with PC-based
software

Configure the unit from a PC through the built-in RS232
interface or the front panel. It also comes equipped with
an RS485 interface supporting MODBUS-RTU and with
configuration software. It features a spreadsheet-like graphical
interface enabling flexible configuration of all the parameters
in the unit. The M3000 also offers configuration of average
deviations alarms. This feature is used in monitoring of the
exhaust gas temperatures of diesel or gas engines. The
average temperature from a number of cylinders is calculated.
If the temperature value of one of the cylinders deviates from
the average of the remaining cylinders by more than a preset
± offset, a deviation alarm will be activated.

Accessories

A

M1500 PT100 6-way Transmitter

Six current transducers in one box for use with
DIN60751 3-wire PT100 temperature sensors. The
output signals are 4-20 mA current, which can be
easily fed into the M3000. Each sensor input can
be configured for 3 different temperature ranges.

Specifications

Voltage Supply
Consumption Max. 400 mA
Sensor Inputs 24
Input Types 20 mA, 10 Vdc and 24 Vdc
Alarms 48
Alarm Delays 300 msec. to 10 days
Outputs 14 on/off open collector outputs, each controlled

by one or more alarms. Max. 150 mA per output

General Alarm Output Max. 150 mA
Siren Control Max. 150 mA
LEDs 24
LCD Display 2 x 16 characters with background light
Communication RS485 interface
Protocol MODBUS-RTU

Operating Temp. –20°C to +70°C
Humidity 95% RH at 20°C
Vibration Test 4 g RMS according to IEC 60068-2-64
EMC CE according to EN50081-1, EN50082-1, EN50081-2,

EN50082-2 and EN61000-2-6

Approvals Certified by major marine classification societies
Burn-in 50 hours before final test
Weight 0.8 kg
Dimensions H 144 mm (5.7”); W 144 mm (5.7”); D 70 mm (2.7”)
Panel Cut-out H 138 mm (5.4”); W 138 mm (5.4”)

Protection Degree at Front IP54

24 Vdc ± 30%

© May 2012 Littelfuse Protection Relays & Controls