Q: What’s the difference between GX-ID1611 (2 tier) or GX-ID1612 (3 tier)
A: Generally speaking
2 Tier refers to 2 rows of terminals and therefore, a longer footprint (Left to Right) with shorter profile (DIN Rail to front of cabinet)
3 Tier refers to 3 rows of terminals and therefore, a shorter footprint (Left to Right) with taller profile (DIN Rail to front of cabinet)
They are both 16 point input modules (NPN)
GX-ID1611 has 1 common per 16 points
GX-ID1612 has 1 common per 8 points (2 total)
They would then also have different wiring diagrams
Starting on page 107
GX-series EtherCAT Slave Units User’s Manual
(page 7-10) 1611 – 16points, NPN, 16 points/common, expansion function compatible
(page 7-28) 1612 – 8 points / common, expansion function not compatible
(page 7-13)
( page 7-31)
Date/Revision History
Track the changes made to the document over time. Include dates and a brief summary of each update or revision.
Ex.
First review 9/29/2025 V1.0
Author:
Ed Gallagher – Technical Support Specialist
References
GX-series EtherCAT Slave Units User’s Manual
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