Chapter 1: Installation and wiring
Vigilant VS1 and VS2 Technical Reference Manual 11
Device loop wiring
The control panel provides one device loop circuit that can be used with detectors
and modules. See “Setting up a HyperTerminal connection” on page 188 for the
number of devices (device addresses) that can be wired on a loop. The loop circuit is
supervised for opens, shorts, and grounds.
Note: For a complete list of devices that can be connected to this circuit, refer to the
VS1 and VS2 Series Compatibility List (P/N 3101065).
Circuit specifications
• Class B or Class A
• Communication line voltage: Maximum 20.6 V peak-to-peak
• Circuit current: 0.5 A max.
• Max. total resistance: 66 Ω
• Max. total capacitance: 0.7 µF
• Max. resistance between isolators: Limited only by overall wire run lengths
• 64 isolators maximum (total both isolator bases and modules)
• Ground fault impedance: 0 to 5 kΩ
• Power-limited and supervised
• Signal synchronization is supported on a system-wide basis (all device loops)
when using GSA-CC1S or GSA-MCC1S addressable NAC modules and Genesis or
Enhanced Integrity notification appliances.
Installation limits are subject to acceptance by the Authority Having Jurisdiction
(AHJ).
Figure 14: Terminal wiring location
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