[国外标准] NEMA ICS 2-2000 Controllers, Contactors and Overload Relays Rated 600 V
[国外标准] JIS B3512-1999 Programmable controllers-Test and verification of field network standard(Level 1)
[国外标准] JIS B3503-1997 Programmable controllers-Programming languages
[国外标准] JIS B3502-2004 Programmable controllers-Equipment requirements and tests
[国外标准] JIS B3501-2004 Programmable controllers-Part1：General Information