The SD505-6IB isolates a short circuit wiring fault on a Class A (Style 7) and Class B (Style 4) SLC loop. Normally if the FACP detects a short on the SLC loop, the entire loop can be disabled. When the SD505-6IB is attached to the loop, a short, open or ground fault occurring on the SLC loop will be detected as a trouble but all SLC devices will continue to operate.
The isolator module fits underneath the SD505-6AB detector base.
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