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Fig. 6.12.2. 66 Block connections for Discretes 49–64, Relays 1–8, and Analogs 1–6
RTN* is the alarm return pin. Alarms on standard units are dry closure or ground closure. Most units
will have RTN internally tied to GND. However, special hardware assemblies may have RTN isolated
from GND. For details regarding your unit's hardware, please reference the product description
appendix.
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