31.2 Certification StandardsSafetyIEC 62040-1:2008IEC 60950-1:2005 (Modified)EMCConducted Emission: IEC 62040-2. Category C3Radiated Emission: IEC 62040-2. Category C3ESD:IEC 61000-4-2. Contact: Level 2, Air discharge: Level 3RS:IEC 61000-4-3. Level 3EFT:IEC/EN 61000-4-4. Level 4Surge:IEC/EN 61000-4-5. Level 4CS:IEC/EN 61000-4-6. Level 3MS:IEC/EN 61000-4-8. Level 3Voltage Dips, short interruptions and voltage variations:IEC/EN 61000-4-11Warning: This is a product for commercial and industrial application, in otherenvironment installation restrictions or additional measures may be needed toprevent disturbances. Additional curbs may be needed while output wiringlength is more than 10m or communication wiring length is more than 3m.