CHAPTER 1. Before Installing1-2 © Samsung Business Communications1.2 Grounding ConditionsThe following precautions should be taken when grounding the OfficeServ 7400 system:y The grounding wire should be correctly grounded to the earth.y The flow of electric current between the grounding wire of the power plug and the ex-posed metal surface of the system should be satisfactory.y When connecting grounding for additional external equipment to the system ground-ing, it should be made through a single connection point.Cautions for Grounding- Do not connect the grounding wire of the OfficeServ 7400 system to a powerconduit of a building.- The standards for power and grounding should comply with the country standardand the pertinent work should be conducted according to the country standard.- External grounding is required to prevent personal injury or system damagecaused by lightning, static electricity, or voltage surge.- Unplug the AC power code before connecting the ground line. Failure to do somay cause personal injury.- The system should be connected to a wall outlet with a protectiveground.- The GND lug on the back of the OfficeServ 7400 chassis should be grounded.1.3 Power ConditionsThe system power supply module receives AC input power or battery power, and supplies -54 V, -5 V, +5 V, +3.3 V, +12 V, and -56 V to the system chassis. The power condition is asfollows:y AC 100~240 V, 3 A, 50/60 Hz, or DC 48 V, 10 ATable 1.1 I/O Voltage of Power Supply ModulePower Supply SpecificationInput Power(AC) AC 110V, 220V (Free Voltage)Power Supply Unit(PSU)Input Power(DC)- DC -54 V, 6.6 A- DC +5 V, 16 A- DC -5.3 V, 2 A- DC +3.3 V, 30 A- DC +12 V, 1 A- DC -56 V, 0.4 A (for Backup)Input Power AC 110V, 220V (Free Voltage)External Rectifier(Model: OfficeServ 7150) Output Power DC -54 V, 10 A
