Appendix A: Panel specifications 
Vigilant VS1 and VS2 Technical Reference Manual  193 
  VS1 panel  VS2 panel 
Loop circuit  Maximum loop resistance: 66 Ω 
Maximum loop capacitance: 0.7 µF 
Communication line voltage: Maximum 20.6 V peak-to-peak 
Operating current (fully loaded loop) 
Stand by: 60 mA 
Alarm: 125 mA (this does not include two-wire smoke modules) 
Circuit current: 0.5 A max. 
Style 4, 6, and 7 wiring 
Max. resistance between isolators: Limited only by overall wire run lengths 
64 isolators maximum (total both isolator bases and modules) 
Batteries  Type: Sealed lead acid 
Voltage: 24 VDC 
Charging current: 2.47 A max. 
Amp hour capacity: 26 Ah 
Standby operation: 24 hour or 60 hour 
Placement: Up to two 10 Ah batteries will fit
in the Vigilant VS1 control panel 
cabinet and two 18 Ah batteries will fit in the VS2 control panel cabinet. If 
larger batteries are required, you must use a GE Security battery cabinet. 
SA-DACT dialer  Phone line type: One or two loop-start lines on a public, switched network 
Phone line connector: RJ-31/38X (C31/38X) 
Communication formats: Contact ID (SIA DC-05) 
Operating current 
Standby/Alarm: 41 mA   
Max.: 100 mA 
FCC registration number: GESAL01BSADACT 
Industry Canada Registration number: 3944A-SADACT 
Ringer equivalence number: 0.1B 
Ground fault impedance  0 to 5 kΩ 
Alarm contact  Form C N.O. 24 VDC at 1 A (resistive load) 
Trouble contact  Form C 24 VDC at 1 A (resistive load) 
Supervisory contact  Form A N.O. 24 VDC at 1 A (resistive load) 
Environmental Temperature: 0 to 49°C (32 to 120°F) 
Humidity: 0 to 93% RH, noncondensing 
Terminal rating  All terminals rated for 12 to 18 AWG (0.75 to 2.5 sq. mm)