Eaton 91PS User And Installation Manual

Also see for 91PS: Safety and installation quick guide Safety and installation quick guide User and installation guide User and installation guide

Contents

2. Open the front door of the UPS.3. To remove the MiniSlot cover plate, remove the 2 screws securing theplate.4. To install the MiniSlot communication device, push it all the way in.5. Secure the MiniSlot communication device with 2 screws.6. Route and install the LAN and other cables to the appropriate MiniSlotcards. The cable route is through the signal cable canal in the top sectionof the UPS.7. For operator instructions, refer to the manual supplied with the MiniSlotcard.8. When all the wiring is completed, close the front door and secure it with thelatch.5.7.6 Installing signal interface connections in a parallel systemThe installation of the signal interface connections in a parallel system is doneby following the aforementioned instructions. Signal inputs can be paralleledbetween the units, that is, the same contact can be used for several units’ signalinput signaling. This concerns also the EPO signal.5.8 Wiring parallel 91PS/93PS UPS systemsThe outputs of multiple 91PS/93PS UPS systems can be connected in parallel.Up to 4 units can be paralleled. The UPS static bypass power rating needs to beidentical among all the paralleled units. However, paralleled UPS cabinets canbe housed with different number of UPM power modules.The outputs are paralleled to increase the load capacity of the power systemand for redundancy. The system is paralleled for (N+1) redundancy as long asthere is always one or more UPS online than required to support the load. Thesystem is paralleled for capacity if all UPSs in a system are required to supportthe load.Communication between the UPSs is required for system metering and modecontrol. The system level communication and control are accomplished using aController Area Network (CAN). A pull-chain signal in each UPS, connected tothe other UPSs in parallel and tied to the bypass status relay in each UPS, isused for a secondary communication path. This arrangement ensures bypasscontrol even if the CAN bus is lost.WARNINGDo not use the internal maintenance bypass switch in units that areconnected in a parallel configuration.Eaton 91PS/93PS UPS 8-10 kW User's and installation guide© Eaton Corporation plc 2018. All rights reserved. Revision: 003 Document ID: P-164000672 56 (102)