The Hochiki SCI is a DCP short-circuit isolator module. It opens the SLC loop during a downstream short to keep the rest of the loop alive.
First, install the SCI between groups of devices on the SLC loop. Then if a short appears, adjacent isolators activate. As a result, only the segment between two tripped SCIs loses communication, while the rest of the loop stays online.
How the Hochiki SCI Works
In Class A wiring, two adjacent isolators bracket the fault. Specifically, the left and right SCIs to the shorted section both trip. However, in Class B wiring only the isolator closest to the short trips, and devices beyond the fault lose communication.
Furthermore, each SCI checks the line at power-up. Then, if normal, it closes its relay automatically. Also, the yellow LED stays off in normal conditions and turns on when the isolator activates. Therefore, the loop self-restores once the short clears.
Hochiki SCI Specifications
- Supply voltage (S-SC): 33 to 41 VDC
- Average current: 270 microamp typical (10 mA in active short condition)
- Visual indicator: yellow LED (off normal, on active)
- Dimensions: 4.2″W x 4.7″H x 1.4″D
- Weight: 1.4 oz
- Mounting: 4″ square electrical box or double gang
- Operating temperature: 32 to 120 degrees F
- Relative humidity: 90% non-condensing
- Listings: UL, CSFM 7300-0410:150, MEA
Order the Hochiki SCI
Life Safety Consultants stocks the Hochiki SCI alongside compatible DCP-protocol panels and devices. To order or confirm panel compatibility, call 1-888-557-0558. Alternatively, email sales@lifesafetycom.com.
For more information, contact the Life Safety Consultants team at (888) 557-0558, or email us at: sales@lifesafetycom.com
Additional information
| Weight | 1.6 lbs |
|---|---|
| Dimensions | 3 × 6.6 × 6 in |
| Condition | New |
| Manufacturers | Hochiki |
| Part Type | Detector Base |
