Omron Programmable Terminals NT31 NT31C - Manual (Page 269)

Appendix C Using an RS-232C/RS-422A Convertor Unit
261
Specifications
The general specifications and communications specifications of the convertor unit are shown below.
General Specifications
Item Specification
Dimensions 30 (W)
114 (H) 100.2 (D) mm: with the RS-422A terminal block cover closed
30 (W) 114 (H) 119.5 (D) mm: with the RS-422A terminal block cover open
Weight 200 g max.
Operating ambient temperature 0 to 55
_C
Operating ambient humidity 10% to 90% (with no condensation)
Rated power supply voltage +5 V
" 10% (using pin No. 6 of the RS-232C connector)
Rated power supply current 150 mA max.
Rush current 0.8 A max.
Insulation resistance 20 M Ω or higher, measured between all RS-422A terminal signal lines collectively
and functional ground terminal with a 500 VDC megger
Dielectric strength 1500 VAC for 1 minute between all RS-422A terminal signal lines collectively and
functional ground terminal
Leakage current: 10 mA max.
Operating environment No corrosive gases
Storage ambient temperature −20 to +75_C
Vibration resistance Conforms to JIS C0911 60 minutes in each of X, Y, and Z directions
Shock resistance Conforms to JIS C0912 47m/s 2 , 3 times in each of X, Y, and Z directions
Communications Specifications
RS-232C Interface
Item Specification
Communications speed Max. 115.2k bps
Transmission distance Max. 2 m
Connector 9-pin D-SUB connector (female)
RS-422A/485 Interface
Item Specification
Communications speed Max. 115.2k bps (depends on the RS-232C communications speed)
Transmission distance Max. 500 m
Connector 8-terminal detachable terminal block, M3.0