SilentKnight SD505-6IB 6 Isolator Base - Manual

P/N 151175
SILENT
KNIGHT
®
SD505-6IB (6” Isolator Base)
Installation Instructions
The SD505-6IB is a 6 inch isolator base that fits
underneath the 6 inch detector base.
Class A (Style 7) Configuration
An isolator base is used to isolate a short circuit
wiring fault on a Class A (Style 7) SLC loop.
Normally if the control panel detects a short on
the SLC loop the entire loop is disabled. When
isolator modules are used (as shown in Figure 1)
and a short, open or ground fault occurs on the
SLC loop, it will be detected as a trouble but all
the SLC devices will continue to operate.
Figure 1: Class A (Style 7) Example
Class B (Style 4) Configuration
Figure 2: Class B (Style 4) Example
1. If a short occurs at point A (Figure 2),
isolator base 1 will activate, isolating SLC
devices 2 and 3 from the rest of the loop.
2. If a short occurs at point B (Figure 2),
isolator base 2 will activate, isolating SLC
devices 5 and 6 from the rest of the loop.
3. If a short occurs at point C (Figure 2),
isolator base 3 will activate, isolating SLC
devices 8 and 9 from the rest of the loop.
SD505-6IB Specifications
Specification Parameter Rating
Operating Temperature: 32° - 120° F
(0° - 49° C)
Dimensions:
Length: 4-7/8”
Width 4-7/8”
Depth: 7/8”
Operating Voltage: 32 VDC
Battery Current Draw dur-
ing AC loss: Alarm/Standby: 92 uA
SLC Current: 50 uA
Max. SLC Loop Resistance: 50
Ω
For indoor use only
0-50 devices,
up to 10
Ω per
branch