Grundfos IO 351 - General Description; Safety Warning

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 indicates that an action must be
taken.
A red or grey circle with a diagonal bar,
possibly with a black graphical symbol, in-
dicates that an action must not be taken or
must be stopped.
If these instructions are not observed, it
may result in malfunction or damage to the
equipment.
Tips and advice that make the work easier.
2. General description
IO 351 is a module for exchange of digital and analog
signals between CU 351 and the remaining electrical
system via GENIbus. IO 351 comes in the variants A
and B.
IO 351 A is used for one to three Grundfos pumps
with fixed speed.
IO 351 B is used for one to six Grundfos pumps with
fixed speed and/or pumps controlled by external
frequency converters. The module can also be used
as an input-output module for communication with
monitoring equipment or another external equipment.
WARNING
Death or serious personal injury
‐ If IO 351 is used in a manner not
specified by the manufacturer, the pro-
tection provided by IO 351 may be im-
paired.
30
32
34
35
53
55
57
60 10
12
14
15
A A
Y Y
B B
L
L
N
N
76
77
81
76
79
5
10
9
2
6
7
1
4
3
8
1
11
TM031134
IO 351 A
Pos. Description
1 DIN rail locking tab
2
Indicator lights and transmitter/receiver for
communication with R100
3 Earth connection to cabinet
4 Cable clamp for GENIbus cables
5 Nameplate
6 Holes for mounting with screws
7 Terminals for voltage supply
8 Terminals for relay output
9
Terminals for inputs for PTC sensor or ther-
mal switch
10 Terminals for GENIbus
11 Terminals for digital and analog inputs
6
English (GB)