Input circuits: minimum working/service voltage: 12 volts
Output circuits (switching DC): minimum working/service voltage: 30 volts
Reader data lines: minimum working/service voltage: 5 volts
Reader power: minimum working/service voltage: as required by reader
RS-232 communication: minimum working/service voltage: ±25 volts
RS-485 communication: minimum working/service voltage: ±7 volts
Ethernet (non PoE): minimum working/service voltage: 5 volts
PoE: minimum working/service voltage: 60 volts