Littelfuse M1000 User Manual

Engine Control

Alarm Monitoring

Monitoring

M1000 SERIES

Alarm Monitor

Simplified Circuit Diagram

+

SUPPLY

–

28 29

1

10

11

12

13

ALARM
INPUT
CONTACTS

M1000

(Alarm Monitor)

TEST

RESET

BLOCK

COLLECTOR

OUTPUTS

Features & Benefits

FEATURES BENEFITS

10 configurable
digital inputs

11 open collector outputs Allows ex ternal contr ol and remote indic ation

1 siren relay output Direct connection of alarm siren

Special indication of
first alarm

Multiple units can be
connected as one system

Voltage and insulation
monitoring

Dimming of LEDs Suitable for bridge consoles

Type-approved by marine
classification societies

Configuration by
DIP switches or PC

RS485 Modbus RTU

Supports both NO and NC input contacts

Provides clear alarm overview in
larger systems

Modular and scalable solution

Replaces voltage and insulation monitoring
relay on the DC system

Applicable in harsh environments

Easy installation and configuration

Communication with HMI and
SCADA systems

OPEN

SIREN

17

26

30

31

32

Description

The M1000 is an alarm panel with 10 digital inputs. Inputs from
a dry contact (normally open [NO] or normally closed [NC])
will cause the corresponding LED to flash. Simultaneously a
common alarm output and a siren output will be activated as
well as an individual output. The unit has separate indications
of first alarm, following alarms and acknowledged alarms. It
also has dedicated inputs for remote reset and blocking. The
unit can be configured for cable monitoring and monitoring of
its own supply and insulation level.

Multiple M1000 units can be interconnected to form a large
scale alarm system. In this situation functions are available
for synchronizing the flashing of the LEDs and enabling
global indication of first alarm for all connected units. Alarm
related parameters like time delays, reset functions and other
features can be configured through 18 programming switches.
The M1000 can also be configured via the RS232 interface.
A standard ANSI/VT100 terminal is used as programming
tool. The M1000 is equipped with a 2-wire RS485 interface
supporting MODBUS-RTU communication.

Specifications

Voltage Supply 12-24 Vdc-30%/+30% (8-32 Vdc)
48-110 Vdc-30%/+40% (33-155 Vdc)

Max. Power
Consumption 180 mA

Ambient Temp. –10°C to +70°C (also available for –40°C to +70°C)
Siren Relay Contact 220 Vac/2 A; 30 Vdc/2 A, 30 W
Output Max. 150 mA per channel
Resistance in

Sensing Cable Max. 1000 W
Insulation Monitor 25 kW±8 kW (50 kW±10 kW for M1000-11-XXC)
Impulse Test 4.5 kV
EMC CE according to EN50081-1, EN50082-1,

EN50081-2, EN50082-2 and EN61000-2-6

Programming 16 dip-switches or via RS232 interface
Communication RS485 interface
Weight 0.4 kg
Dimensions H 144 mm (5.7”); W 144 mm (5.7”);

Panel Cut-out H 138 mm (5.4”); W 138 mm (5.4”)

Protection Degree
at Front IP54 (see Type Description)

1

/50 μsec.

D 35 mm (1.4”)

Ordering Information

ORDERING
NUMBER

M1000.0040 48-110 Vdc IP54 front

M1000.0080 12-24 Vdc IP54 front

M1000.0220 12-24 Vdc Internal siren, IP54 at front

© 2013 Littelfuse Protection Relays & Controls
www.littelfuse.com/m1000

CONTROL
POWER

FUNCTION

Rev: 4-A-050313