Siemens SINUMERIK 840D sl Manual

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Requirements placed on the DC power supplyWARNINGInadequately fused supply cables can be life-threateningIn the case of supply lines > 10 m, protectors must be installed at the device input in orderto protect against lightning (surge).The DC power supply must be connected to the ground/shield of the I/O module for EMCand/or functional reasons. For EMC reasons, this connection should only be made at onepoint; see also EMC Installation Guide.Table 9-13 Requirements of the DC power supplyRated voltage According to EN 61131-2 24 V DCVoltage range (average value) 20.4 V DC to 28.8 V DCVoltage range (dynamic) 18.5 to 30.2 V DCVoltage ripple peak-to-peak 5% (unfiltered 6-pulserectification)Booting time at POWER ON AnyNon-periodic overvoltages ≤ 35 VDuration of overvoltage ≤ 500 msRecovery time ≥ 50 sEvents per hour ≤ 10Transient voltage interruptions Outage time ≤ 3 msRecovery time ≥ 10 sEvents per hour ≤ 10Digital inputsThe 24 V supplied at X1 are used to supply the 72 digital inputs.If the internal supply voltage is not used to supply the digital inputs, this can optionally bereplaced by an external power supply (24 V DC). The reference ground of the power supplysource must each be connected with X111, X222, X333, pin 1 (GND). X111, X222, X333, pin2 (P24OUT) then remains open.Digital outputsTo supply (24 V DC) the digital outputs, an additional external power supply source is required.The power supply is connected to terminals X111, X222 and X333 via pins 47, 48, 49 and 50(DOCOMx). Ground pins must be connected to a common chassis ground.Connectable components9.2 PP 72/48D PNNCU 7x0.3 PN, NCU 7x0.3B PNManual, 06/2014, 6FC5397-1EP40-5BA1 101