The EM-70D Electronic Monitor is a device designed to monitor several critical functions in the electrical system of a vehicle that operateson a 24 volt system. It will also monitor the 12 volt service when using a Vanner VoltMaster Battery Equalizer which supplies 12 volt servicefrom a 24 volt source.
Characteristics
The EM-70D can function in a variety of ways:
The monitor functions as an alternator monitor when the Battery Balance lamp output and +12 volt monitor inputterminals are not in use.
The monitor functions as a device to control a field current relay, shutting down the field current if the voltage regulator failsin the full field mode. This function is accomplished by connecting the EM-70D as normal and installing a latching fieldcurrent relay to the Battery High lamp output terminal.
In all cases the lamp outputs in the EM-70D are designed to provide the ground connection for lamps (or buzzers, beepers, relays) under afault condition. The lamp outputs have also been designed so they may be paralleled should the installer wish to have fewer than three (3)indicator lamps in service. If this is done, the output current remains at 0.375 amps (375 milliamps). It is possible to install momentary lighttest switches (or just one (1) light test switch provided three (3) isolating diodes are installed) so as to enable the operator to check thelamps to determine if they are functioning.
