Electrical Requirements Supply voltage typically +24 V DC (SELV/PELV) minimum +18 V DC The PC 521 is a data recording PC with an Intel Celeron J1900 processor that is PC-compatible and operates with a standard PC BIOS. For better heat dissipation, a ventilator can be mounted onto the PC 521. Current consumption Power supply +24 V +18-30 V DC (NEC Class 2 or LVLC) typically 1 A (without externally connected devices) maximum 1.6 A (with external devices connected) Inrush current with 24 V/10 A fixed voltage supply Inrush current without current-limiting supply Mechanical Dimensions PC 521 incl. mount Article Number and Miscellaneous Article number Operating system Environmental Conditions Performance Data Processor Hard drive Main memory (DDR-RAM) Graphics Interfaces Real-time clock Storage temperature INTEL Celeron J1900 128-Gbyte Solid State Disk 4-Gbyte DDR3 RAM (SODIMM) Intel Graphics DX 11 4x Ethernet 10/100/1000 Mbit 2x USB 2.0 2x USB 3.0 1x VGA 1x Audio (Line Out) 1x HDMI yes (battery buffered) Environmental temperature (without fan) Environmental temperature (with fan) Operating conditions EMC resistance EMC noise generation pollution degree 2 indoor use altitude up to 2000 m in accordance with EN 61000-6-2 (industrial area) in accordance with EN 61000-6-4 (industrial area) Vibration resistance Shock resistance Protection type EN 60529: protected through the housing