Device Addresses: VS4: one loop, 250 device addresses VS1: 64 addresses
Wiring: Class B or Class A
Operating Voltage: 24 VDC
Operating Current (fully loaded loop): Standby: 55 mA; Alarm: 80 mA
Communication Line Voltage: Max. 20.6 V peak-to-peak
Terminal Rating: 12 to 18 AWG (0.75 to 2.5 mm2)
Circuit Current: 0.5 A max.
Max total loop resistance: 66 Ω
Max total loop capacitance: 0.5 μF
Isolators: 64 isolators maximum per loop (total both isolator bases and modules)
Ground Fault Impedance: 0 to 5 kΩ
Operating Environment: 32 to 120°F (0 to 49°C) 0 to 93% noncondensing at 90°F (32°C)