Parker IQAN-MC31 Instruction Book

15Supply voltageInstruction book, IQANSupply voltageBefore any installation of the IQAN system can take place, make sure the ignition lockis turned off and the battery is disconnected.Emergency stopMake sure an Emergency Stop disconnecting the power supply, is easily accessible atany time. The figure below shows how to connect the emergency stop.Connecting of Supply VoltageThe supply voltage, should be within the operating interval, see Appendix A. Connectthe supply voltage to +BAT and -BAT. Protect the module by using a fuse. Forrecommended fuse level, see Appendix A.RTC supplyIQAN master modules have a clock that is used for date/time stamping when loggingdata. The real time clock, +RTC, requires a separate positive power connection.Connect the supply voltage to +RTC through a 1.5K ohm resistor. The resistor shouldbe as close to the battery as possible for safety.IQAN expansion modules do not have +RTC.W ARNINGRisk of injury!To reduce the risk for uncontrolled supply of an IQAN master module, i.e., a shortcircuit between the +RTC cable and +BAT, a resistor must be connected between thebattery and the +RTC input. This is important as this line is not controlled by anemergency stop.The resistor should be placed close to the battery, as the ’protected’ part is the cablebetween the resistor and the unit.This will prevent the +RTC wire from powering up the unit if shorted to +BAT.Connecting the emergency stop and voltage supply.N OTICEDo not use the chassis as the negative terminal.Polarity reversalThe module is protected against power supply polarity reversal and over-voltage,provided an external fuse is being used.If this fuse is not used, polarity reversal can damage the unit.+ -Emergency Stop+BATFuse-BAT** Symbol for disconnectingswitch for battery, ignitionlock and other fuses.+RTC (if master unit)IQAN module1.5 k