Silent Knight SK-ISO — addressable intelligent fault isolator module for the SLC loop, supplied as a standalone module rather than a detector base.
A fault isolator is not a monitor or control point: it has no input and drives no output. It sits in the signaling line circuit and acts as an automatic switch that opens when SLC line voltage falls below 4 V. Honeywell data sheet 350134 Rev F sets out the layout: isolators are spaced between groups of devices, so when a short occurs between any two of them both open, drop only the segment between them, and leave the rest of the loop reporting normally. Silent Knight recommends no more than 25 devices per isolated group. A panel-controlled LED flashes green in normal state and is solid red in alarm.
- Operating voltage 15 to 32 VDC
- Standby current 450 µA max; isolation current 5 mA max
- Fault threshold 4 V, line restoration threshold 7 V, detection delay 250 ms min
- Mounts in a 4 in. square box, 2-1/8 in. minimum depth
- 32 to 120 °F
Check your panel is one of the listed 5700, 5808, 5820XL, 5820XL-EVS, 6700, 6808, 6820 or 6820EVS. The surface box is a separate item, the SMB500, and this is not the SD500-LIM isolator used on SD500-protocol loops.
