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Appendix A
APPENDIX A
Specifications
General Specifications
Item Specification
Power supply voltage 24 VDC
Allowable power supply voltage range 20.4 VDC to 26.4 VDC (24 VDC --15% +10%)
Power consumption 24V, less than 15W (ST121 (B)-EV )
24V, less than 25W (ST211 (B)-EV )
Inrush current 3Amax.
Ambient operating temperature 0to+50 C (with no freezing)
Storage temperature --20 to +70 C (with no freezing)
Ambient operating humidity 35 to 85% RH (with no condensation)
Operating environment No corrosive gases.
Resistance to electrostatic discharge Level 3 (IEC801-2)
In air 8 kV, contact 6 kV, indirect 7kV
Electromagnetic field strength 10 V/m (IEC801-3)
Fast transient/burst noise Power supply line: 2 kV (IEC801-4)
I/O line: 0.25 kV
Damped oscillatory wave Power supply line: 1 kV (IEC255-4)
Vibration resistance 10 to 22 Hz with 1.5 mm double amplitude for a total of 30 min. in X, Y, and Z
directions.
22 to 500 Hz with 1.5 G {14.7 m/s
2
} acceleration in X, Y, and Z directions.
Shock resistance Durability: 30 G, 3 times each in X, Y, and Z directions.
Malfunction: 20 G, 3 times each in X, Y, and Z directions.
Dimensions (mm) 275 (W) x 192 (H) x 71 (D) mm
Weight 1.8 kg max.
Enclosure ratings Front panel:
Equivalent to IP65 (front face waterproof construction).
Rear case: IP20
Terminals: IP00
Applicable standards EN61131-2 (1994)
EN50081-2 (1992)