Engine Control
© 2013 Littelfuse Protection Relays & Controls
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Description
The M2600 Shutdown Unit is a back-up protection device
designed for marine engines. It is ensuring safety shutdown
of the engine in case normal primary shutdown fails. Together
with Engine controller units M2000 or M2500 or other
engine controllers it can be used to build a complete control,
alarm and safety system for marine engines. Alternatively
it can work as a standalone primary shutdown unit in
applications where shutdown functionality is not included
in the start/stop device of the engine. The M2600 design is
based entirely on discreet logic, thus meeting requirements
to safety shutdown devices from the marine classification
societies.
All inputs and outputs of the M2600 have corresponding LED
indication clearly showing whether they are active or not.
The unit furnishes 10 digital shutdown inputs. One is pre-
defined for overspeed and another for emergency stop. All
inputs are dry contacts. Output relays are provided for control
of the fuel valve and the stop solenoid when stopping the
engine in normal conditions. Another output relay is provided
for emergency shutdown. Additionally the unit provides an
output for circuit breaker trip for use with gen-sets. Engine
speed (rpm) can be detected from magnetic and inductive
pick-ups connected to dedicated inputs. Alternatively the
speed can be detected from digital inputs. M2600 provides
cable monitoring on all sensor inputs and for the shutdown
relay output. Configuration is made solely with the dip-
switches and rotary switches on the unit.
Ordering Information
Simplified Circuit Diagram
Features & Benefits
www.littelfuse.com/m2600
M2600 SERIES
Shutdown Unit
ORDERING NUMBER REQUIREMENT
M2600.0010 Optional
Specifications
Operating Temp. –15°C to +70°C
Humidity 95%
Vibration DNV vibrations class B
EMC IEC 60945
Enclosure IP30
Primary Supply +24 Vdc (-30 %/+30 %) <3 W
Backup Supply +24 Vdc (-30 %/+30 %) <3 W
Connection Screw terminals
Type Magnetic (2-wire), NPN and PNP (3-wire)
Rated Frequency 25.0-25,000 Hz
9 Digital Sensor Inputs Normally open contacts to COM (default) or
normally closed contacts to COM.
Optional cable monitoring.
All Relays except where otherwise specified
Relay Response Time 20 ms (worst case)
Contact set(s) 1 normally open
Contact rating AC: 1 A, 250 Vac; DC: 1 A, 35 Vac
Run/ Stop Solenoid relay
Relay Response Time 20 ms (worst case)
Contact Set(s) 1 normally open
Contact rating: AC: 8 A, 250 Vac; DC: 8 A, 35 Vdc
System fault output relay (Siren)
Relay response time 20 ms (worst case)
Contact set(s) 1 change over
Contact rating: AC: 1 A, 250 Vac; DC: 1 A, 35 Vdc
Dimensions H 157 mm (6.2”); W 210 mm (8.3”);
D 52 mm (2.0”)
FEATURES BENEFITS
10 digital shutdown inputs
with cable monitoring
Monitoring of e.g. oil pressure, coolant
temperature and engine speed
Speed detection
via magnetic or
inductive pick-up
No tacho relay required
LEDs for status indication
Easy overview of engine condition and
operation
Cable monitoring on
fuel valve and
stop solenoid output
Fail safe system, no need of separate cable
monitoring module
Configuration by
DIP switches
Easy installation and configuration
?
PICK-UP
RUNNING
STOP ERROR
SHUTDOWN
CABLE BREAK
ALARM
PRIMARY SUPPLY
SECONDARY SUPPLY
C/B TRIP
SHUT DOWN
FUEL VALVE
STOP SOLENOID
SIREN RELAY
INPUTS
OUTPUTS
M2600
(Shut-Down Unit)
COM
COM
OVERRIDE
SIREN RESET
SD RESET
OVERSPEED
TEST
EMERGENCY
STOP
COOLANT
TEMP.
LUBE OIL
PRESS.
COOLANT
LEVEL
FUEL OIL
LEAK.
PRIMARY +24 V
PRIMARY -
SECONDARY +24 V
SECONDARY -
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2
3
4
5
6
7
8
9
10
11
12
13
14
15
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
S1 S2 S3 S4
Rev: 4-A-050313
(5 Seiten)
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