292.5.4 Sounder CircuitsThe 5100 & 5200 are equipped with twosupervised sounder circuits. These are denotedas Circuits A and B.The 5400 is equipped with four supervisedsounder circuits. These are denoted as Circuits A,B, C and D.Each Sounder output is rated at a maximum of1 Ampere.The terminal connections on the base card areshown in the diagram opposite.B –B +A –A + Base Card Connections – Typical.The sounder outputs are monitored (supervised)for open and short circuit conditions using reversepolarity signals. Sounder must be equipped withan in-built blocking diode that prevents thesounder from taking power when the output is inthe supervising condition.An End-of-Line Resistor (EOLR) of value 6200,½ Watt must be fitted to the last sounder / bell.Refer to Appendix 2 – Recommended Fire RatedCables for further information on cable types to beused.+-TypicalArrangementEOLTypical Sounder Arrangement.When screened cable is used, it is vital to connect the screen to the chassis / earth at the cablegland input / earth stud in the panel. Always ensure that all segments of the cable loop havecontinuity of the screen and take care to ensure that the screen is not exposed to any otherearth point (e.g. metalwork, cable trays, junction boxes, etc.).The sounder outputs support monitoring with an Active EOL device to ensurecircuit integrity in accordance with the requirements of EN54-13.The sounder circuits can be configured forcompliance with EN54-13 by programming andthe use of an Active EOL device. All panelsounder outputs must be fitted with the ActiveEOL device (Mxp-505)The panel uses techniques to ensure that a faultwarning condition is reported if the circuitresistance increases to a condition where thevoltage at the last device may fall below itsminimum operating voltage level. This iscompatible for load currents from minimum up tomaximum (1 ampere).Install the Active EOL device at the end of thesounder circuit instead of the normal EOL resistor– this device is polarity sensitive. Connect the Redlead to the sounder + signal line.+-TypicalArrangementActiveEOLTypical Sounder Arrangement.OBSERVE POLARITYThe Active EOL device is polaritysensitive.The Active EOL is fuse protected –however, if connected incorrectlyand the sounder circuit is activated,the fuse will open and is not userreplaceable.www.acornfiresecurity.comwww.acornfiresecurity.com