1MRS750881-MUM REC 5235Remote Monitoring and Control UnitTechnical Reference Manual7.2. Terminal connections ..................................................................647.3. Terminal diagrams ......................................................................697.3.1. REC 523 with sensors .....................................................697.3.2. REC 523 with three current transformers ........................707.3.3. REC 523 with three current and three voltagetransformers .....................................................................717.3.4. REC 523 with four current and three voltagetransformers .....................................................................727.3.5. REC 523 with five current and four voltagetransformers .....................................................................737.3.6. REC 523 with six current and three voltagetransformers .....................................................................747.3.7. REC 523 with three current and six voltagetransformers .....................................................................757.3.8. Application example .........................................................768. Service .....................................................................................779. Ordering information ..............................................................799.1. Order number ..............................................................................799.2. Software configuration and software number ..............................799.3. Optional peripherals ....................................................................8010.Parts and assembly description ...........................................8111.Revision history of REC 523 .................................................8311.1.Revision identification .................................................................8311.2.Changes and additions to earlier released revisions ..................8311.2.1.Release Q1/99 .................................................................8311.2.2.Release Q2/99 .................................................................8311.2.3.Release Q4/00 .................................................................8511.2.4.Release Q1/04 .................................................................8611.2.5.Release Q1/05 .................................................................8712.Index ........................................................................................89