The 9143 series compact Ex i power supply is used for the intrinsically safe supply of power to field devices, e.g. three- or four- conductor transmitters, solenoid valves, light barriers and controllers. It delivers stable, adjustable output voltage via intrinsically safe outputs.
Safety Data
Max. voltage Uo: 12.4 V
Max. current Io: 150 mA
Max. power Po: 1.86 W
Max. permissible external capacity Co for IIC: 1.24 ?F
Max. permissible external capacity Co for IIB: 7.9 ?F
Max. permissible external cap.I: 34 ?F
Max. permissible external inductance Lo for IIC: 0.17 mH
Max. permissible external inductance Lo for IIB: 2.08 mH
Max. permissible external induc.I: 20 mH
Internal capacitance: Negligible
Internal inductance: Negligible
Safety- related max. voltage: 253 V
Auxiliary Power
Auxiliary power: 24 V AC / DC
Auxiliary power voltage range: 20 to 28 V AC, 18 to 35 V DC
Aux. power frequency range AC: 48 – 62 Hz
Auxiliary power consumption: 3.3 W
Polarity reversal protection: Yes (DC)
Auxiliary power indication: Green LED
Galvanic Isolation
Test voltage: Acc. to IEC EN 60079- 11
Output to power supply: 1.5 kV
Output
Min. nominal voltage output: 9.5 V
Max. nominal voltage output: 11.8 V
Max. nominal current In output: 130 mA
Current limiting: If the max. nominal current is reached the output voltage is set to 0 V.