CENTSYS G-SPEAK-ULTRA 4G GSM Intercom System User Guide
CENTSYS G-SPEAK-ULTRA 4G GSM Intercom System Technical Specifications Supply Voltage Range: 11-24V DC Maximum Current Draw: 300mA @ 12V DC Input/output Current Rating: 50mA (Open Collector) Input Sense Voltage Range: 0-24V DC (0-1.6V Low-input State, 5V-24V High-input State) Network Provider:…