User Manual User Manual
© Sealevel Systems, Inc. 
- 6 - 
SEALINK REL-16 User Manual
The relays are normally open, and close when energized. Writing a logic value of 
one or zero will change the state. Refer to the Application Programmers Interface for 
more information. 
Pin Assignments (Removable Terminal Block) 
Port A Bit Port A Terminals 
0  0,1 
1 2,3 
2 4,5 
3  6,7 
4  8,9 
5 10,11 
6  12,13 
7 14,15 
Port B Bit Port B Terminals
0  0,1 
1 2,3 
2 4,5 
3  6,7 
4  8,9 
5 10,11 
6  12,13 
7 14,15 
Side Panel View Port A 
7 6 5 4 3 2 1 0
Port : A
E
Side Panel View Port B 
7 6 5 4 3 2 1 0
Port : B










