GuardLogix® Integrated Safety System Controller, Memory: 8 MB, Safety Memory: 4 MB, I/O Memory: 0.98 MB, Optional Non-Volatile Memory Storage: 1 GB (1756-SD1), 2 GB (1756-SD2), Mounting: Chassis, Isolation: 30 V (Continuous), Basic Insulation, USB Port To Backplane, Type Tested At 500 VAC For 60 SEC, Enclosure: Open Type, Rfi Suppression: Radiated: 10 V/M With 1 KHZ Sine-Wave 80% AM From 80 – 2000 MHZ, 10 V/M With 200 Hz 50% Pulse 100% AM At 900 MHZ, 10 V/M With 200 Hz 50% Pulse 100% AM At 1890 MHZ, 3 V/M With 1 KHZ Sine-Wave 80% AM From 2000 – 2700 MHZ, Display: Digital LED, Temperature Rating: 32 – 140 DEG F, Environmental Conditions: Operating Humidity: 5 – 95% (Non-Condensing), Vibration: 2 G, Shock – Operating: 30 G, Non-Operating: 50 G, Current Rating: Draw At 1.2 VDC: 5 MA, Draw At 5.1 VDC: 800 MA, Power Dissipation: 2.5 W, Standard/Approvals: C/US UL listed, TÜV certified, CE-ATEX, CE-EMC, CE-MACH, C-tick, KCC certified, ROSTECHNADZOR