72INM 725B Rev 2111 SERVICING11 1 Module RemovalWARNING !Installation, configuration and maintenance of this annunciator must onlybe performed by competent service personnelWARNING !The RTK 725B & 725C systems described herein operate on a logic voltageof 24VDC and as standard 24VDC is used for the field contact supplyvoltage.Internal or External power supplies using higher voltage AC/DC primarysources and optional high voltage field contact voltages may be present.If this is the case ensure that the annunciator is powered down beforeworking on the unit or any connected apparatus.WARNING !Hazardous voltages may exist on the rear connections of the annunciator.Remove all power before removing any cover or connector. Ensure allcovers and connectors are fully secured before restoring power.All of the cards within the RTK 725B are removable from the rear of the instrumentTo remove a card we recommend the following procedure:-1. Isolate all of the power to the Annunciator.2. Undo the locking screws on either side of the terminal block on the rear of the cell.3. Unplug the terminal block, which can be removed with field wiring still attached.4. The plastic rear cover can be removed using a flat blade screwdriver to release thelocking tabs on either side of the cover.AINPUTS1 2 3 4 3C2C1C 4CCHANNELREAR VIEW5 - 8LOCKINGSCREWTERMINALBLOCKLOCKING TABS
