Di/Do Internal Structure And Wire Connection - ICP DAS USA GT-530 User Manual

2.4 DI/DO Internal Structure and Wire Connection

2.4.1 DI Internal Structure
2.4.2 DI mode- NC (normal close)
The NC mode is used as normal close in relay application as follows. The
logical value of DI is 1 when the relay is ON in normal use. When the relay is
triggered as relay open, the logical value of DI is 0 and the alarm SMS would be
sent to the users.
GT-530 User Manual, Version 1.0, August 2009
GT-530 user manual v1.0
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