ABB Modular Power System III

The Modular Power System III (MPSIII) supplies 5 VDC,±15 VDC, 24 VDC, 48 VDC, and 125 VDC power to HarmonyRack components of the Symphony Enterprise Managementand Control System. The power system is designed to operatewith 2N redundancy. This power system can operate with 120VAC, 240 VAC, or 125 VDC input power.This instruction provides specific hardware installation, troubleshooting, maintenance, and replacement information necessary for the MPSIII system. The information in thisinstruction applies to MPSIII systems installed in ABBcabinets.This instruction can be used as a guide by system engineers. Itis not a tutorial and assumes the reader has a general knowledge of installing and maintaining process control systems.Some sections of this instruction have been prepared in procedure format. There is a sequence flowchart that follows theintroduction to the section and any nonprocedural information. This flowchart directs personnel to the appropriate procedure located in the back of this instruction. By treating eachtask as a separate entity, the procedures provide an easymethod for finding the information needed to perform eachtask. The procedures can be removed and placed in separatefolders or notebooks, or carried to the job site.The procedures have check boxes in the margin by each step.When performing a procedure, check each box as each step iscompleted. Some procedures have numbered warnings and /or cautions under Safety Considerations. A triangle with awarning or caution reference number appears in the margin bythe part of the procedure to which the warning or cautionapplies.Do not perform any procedures related to installation, maintenance, or repair until reading and understanding thisinstruction.

Features

Features of the MPSIII system include:• Power Factor Correction. AC inputs have active powerfactor correction to greater than 0.95.• Online Replaceable Components. Power supply traysmay be replaced while system is operating.• Monitoring Functions. Monitors supplies, fans, and cabinet temperature.• Directly Accepts 120 VAC, 240 VAC, or 125 VDC Inputs.No switches or jumpers to set.

Applications

The MPSIII system is compatible with Harmony Rack systemsand INFI 90® OPEN systems.It is a direct replacement for MPSII systems, used in HarmonyRack systems, in their entireties. Components of the previouspower systems are not compatible with this power system. TheMPSIII system fits in the same cabinet space as the MPSII system, but may require additional mounting provisions.NOTE: The MPSIII system incorporates an optional rear cabinet door fan forsupplemental cooling. Most MPSII systems do not have this fan.