
English (GB) Installation and operating instructions
Original installation and operating instructions
Table of contents
1. General information ........................5
1.1 Hazard statements..........................5
1.2 Notes ..................................5
2. Installing the product .......................5
2.1 Location ................................5
2.2 Mechanical installation .......................5
2.3 Electrical connection.........................6
3. Product introduction........................7
3.1 Product description .........................7
3.2 Intended use, IO 241 ........................7
3.3 Terminals ...............................8
3.4 Identification..............................8
3.5 GENIbus ................................8
4. Servicing the product .......................8
4.1 Replacing the IO module ......................8
5. Technical data ...........................10
5.1 Electrical data............................10
5.2 Mechanical data ..........................10
5.3 Temperature.............................10
5.4 Environmental data ........................10
6. Disposing of the product ....................10
1. General information
Read this document before you install the product. Instal-
lation and operation must comply with local regulations
and accepted codes of good practice
1.1 Hazard statements
The symbols and hazard statements below may appear in Grundfos
installation and operating instructions, safety instructions and
service instructions.
DANGER
Indicates a hazardous situation which, if not avoided, will
result in death or serious personal injury.
WARNING
Indicates a hazardous situation which, if not avoided,
could result in death or serious personal injury.
CAUTION
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate personal injury.
The hazard statements are structured in the following way:
SIGNAL WORD
Description of the hazard
Consequence of ignoring the warning
• Action to avoid the hazard.
1.2 Notes
The symbols and notes below may appear in Grundfos installation
and operating instructions, safety instructions and service
instructions.
Observe these instructions for explosion-proof products.
A blue or grey circle with a white graphical symbol indi-
cates that an action must be taken.
A red or grey circle with a diagonal bar, possibly with a
black graphical symbol, indicates that an action must not
be taken or must be stopped.
If these instructions are not observed, it may result in mal-
function or damage to the equipment.
Tips and advice that make the work easier.
2. Installing the product
2.1 Location
The product is intended for installation in a control panel.
2.2 Mechanical installation
2.2.1 Mounting the module
The product is prepared for horizontal mounting on a 35 mm DIN
rail (EN 50022). Recommended height: 7.5 mm.
Module dimensions and required minimum clearance above and
below the module are shown on the drawing.
24 V
EXT
24 V
EXT
GND
CIO 4
GND
CIO 3
GND
CIO 2
GND
CIO 1
GND
DI 2
GND
DI 1
GND
DIO 2
GND
DIO 1
REL 2O
REL 2
REL 2C
REL 1O
REL 1
REL 1C
IO 241
GENIGENI
Max. 2A Max. 2A
24 V
GND
Max. 2A Max. 2A
24 V
GND
REL 4C
GND
DI 4
GND
GND
GND
MPF2
MPF1
GND
DI 3
DI 2
DI 1
GND
24 V
EXT
ADI
REL 3C
PTC 2B
PTC 2A
PTC 1A
REL 2
COM
REL 1
L1
L2
L3
N
PTC 1B
CT 2B
CT 2A
CT 1A
CT 1B
REL 4O
REL 3O
REL 3
REL 4
GENI
480Y / 277V AC
IO 242
10mm
20mm
124 (4.88")
115.4 (4.54")56 (2.2")
62 (2.4")62 (2.4")
10 (0.39")
20 (0.79")
TM072343
Dimensions for IO 241
1. Fit the module by hooking the top on the DIN rail (1) and
pressing the bottom against the rail (2).
TM072342
2. Connect the cables.
2.2.2 EMC-correct installation
The panel usually contains a control unit, a module, contactors and
other power equipment. Other Grundfos modules may also be fitted
into the panel.
To ensure faultless operation, it is very important to install the
electronic modules in an EMC-correct way.
5
English (GB)