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What are the power supply connection rules in ULP system.
The power supply connection rules in ULP system are given below
> All IFE interfaces and IO modules must have a direct connection with the power supply and cannot be supplied through ULP system.
> The BSCM module and Micrologic trip unit in Compact NSX circuit breakers or the BCM ULP module in Compact NS and Masterpact NT/NW circuit breakers are directly supplied through one of the two RJ45 ULP ports of the IFE or IFM interface or IO module.
> The Micrologic trip unit in Compact NS and Masterpact NT/NW circuit breakers must be supplied by a dedicated AD power supply.
> The 0 V terminal on IFM interfaces is connected to a protective ground terminal block at only one point of the Modbus line.This point of the Modbus line is either the first stacked IFM or the Modbus master if IFM interfaces are not stacked with IFE server. No other devices must have 0 V connected to ground.
> If no IFM interface is installed on the ULP system, 0 V must be connected to a ground terminal block at power supply level. No other devices must have 0 V connected to ground.
> If no IFM interface or Compact NSX circuit breaker is installed on the ULP system, it is recommended to have a floating auxiliary power supply. Do not connect terminals + and - of the 24 Vdc auxiliary power supply output to the ground.
> All IFE interfaces and IO modules must have a direct connection with the power supply and cannot be supplied through ULP system.
> The BSCM module and Micrologic trip unit in Compact NSX circuit breakers or the BCM ULP module in Compact NS and Masterpact NT/NW circuit breakers are directly supplied through one of the two RJ45 ULP ports of the IFE or IFM interface or IO module.
> The Micrologic trip unit in Compact NS and Masterpact NT/NW circuit breakers must be supplied by a dedicated AD power supply.
> The 0 V terminal on IFM interfaces is connected to a protective ground terminal block at only one point of the Modbus line.This point of the Modbus line is either the first stacked IFM or the Modbus master if IFM interfaces are not stacked with IFE server. No other devices must have 0 V connected to ground.
> If no IFM interface is installed on the ULP system, 0 V must be connected to a ground terminal block at power supply level. No other devices must have 0 V connected to ground.
> If no IFM interface or Compact NSX circuit breaker is installed on the ULP system, it is recommended to have a floating auxiliary power supply. Do not connect terminals + and - of the 24 Vdc auxiliary power supply output to the ground.
Released for:Schneider Electric India
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