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© Sealevel Systems, Inc.
SeaI/O | SL9049 11/2021
420 Series
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16 Optically Isolated Inputs/8 Form C Outputs
The SeaI/O-420 provides 16 optically isolated inputs and 8 SPDT Form C relay outputs. Inputs can range from
5-30VDC and provide 2500VAC RMS / 3500VDC isolation to ground. Each output offers normally open and
normally closed contact connections via 3.5mm field removable terminal blocks.
USE EXTREME CAUTION!
High voltages will be present on the SeaI/O family of products when high voltage is connected. Never
handle the printed circuit board when high voltage is connected. Never handle the printed circuit board
when high voltage signals are connected to the board.
Inputs
Type
16 non-polarized optically isolated inputs
Voltage Range
5-30VDC
Isolation
1250VAC RMS / 1800VDC
Input Resistance
6.2K Ohms in series
Response Time
4 microseconds
Outputs
Type
8 SPDT Form C relays
Power
DC 30W / AC 60 VA
Contact Voltage
60VDC max. / 50VAC max.
Contact Current
2A max.
Operate Time
2ms max.
Bounce Time
7ms max.
Release Time
1ms max.