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© Sealevel Systems, Inc.
SeaI/O | SL9049 11/2021
Power Options
Base Module Power Connection
Base modules are powered from a 9-30VDC source using either the DC jack, screw terminals or the Expansion
pass-through connectors on the side of the unit. Sealevel offers several power supply choices to make
connection easy (see the Accessories chapter at the end of this document).
SeaI/O Expansion Power Connection
Each SeaI/O product, including the expansion modules, contains an onboard switching regulator power supply
rated for 9-
30VDC. For local installations (less than 10’ apart), expansion unit power is usually supplied from
the Base unit via the pass-through connectors. The number of expansion modules that can be driven from the
Base unit depends on the power source and number/type of expansion units. Refer to the chart below for
power requirements. For expansion modules mounted remotely (greater than 10’ apart), separate power is
required at each expansion unit. The output power available on the pass-through connector can only supply a
maximum of 1.2A to the additional units.
Supply power for expansion unites that are daisy-chained together should only have a single connection
to an external power supply made by only one expansion unit.
SeaI/O Max Power Requirements
W-Series
E-Series
U-Series
M-Series
S-Series
N-Series
SeaI/O-410
3.4W
2.9W
1.7W
1.4W
1.6W
1.4W
SeaI/O-420
4.0W
3.5W
2.3W
2.0W
2.2W
2.0W
SeaI/O-430
2.4W
1.9W
0.7W
0.4W
0.6W
0.4W
SeaI/O-440
4.5W
4.0W
2.8W
2.5W
2.7W
2.5W
SeaI/O-450
5.8W
5.3W
4.1W
3.8W
4.0W
3.8W
SeaI/O-470
3.5W
3.0W
1.8W
1.5W
1.7W
1.5W
SeaI/O-520
5.5W
5.0W
3.8W
3.5W
3.7W
3.5W
SeaI/O-530
3.4W
2.9W
1.7W
1.4W
1.6W
1.4W
SeaI/O-540
3.9W
3.4W
2.2W
1.9W
2.1W
1.9W
SeaI/O-570
4.3W
3.8W
2.6W
2.3W
2.5W
2.3W
SeaI/O-580
-
5.0W
-
-
-
-
SeaI/O-580PoE
-
5.0W
-
-
-
-