4.6.2Operation with a DC residual current sensor
When operating the charging controller with a 6 mA DC residual current sensor, sensors that provide either an Active High or an Active Low signal in the event of a fault can be used. The signal is provided via an open-collector or open-drain output. The charging controller has an integrated pull-up resistor to 12 V.
Contacts 12V and 0V on the “RCM” connector are available to supply power to external sensors. To test the residual current sensor, the charging controller provides a 12 V test signal at terminal point 5 of the “RCM” connector. The charging controller controls the test signal automatically.
To use the charging controller with external residual current sensors, enable the function in the web-based management of the charging controller (see “Monitoring | Charge Current Monitoring” on page 91).
Figure 4-8Operation of the charging controller with a DC residual current sensor
Figure 4-8 shows the operation of the charging controller with a DC residual current sensor with 12 V fault signal (e.g., Western Automation RCM14-01/RCM14-03).
•When using residual current sensors that provide an Active High or 12 V signal in the event of a fault, connect the fault output of the sensor to contact ER1 on the “RCM” connector (see Figure 4-8).
•When using residual current sensors that provide an Active Low or 0 V signal in the event of a fault, connect the fault output of the sensor to contact ER2 on the “RCM” connector. The connection between the charging controller and the RCM module is established via an XHP-4 connector from JST. An assembled cable for connecting the components is available as CHARX SEC JST-RCM-CBL, 1360462.
NOTE: Reversing the polarity of the “Fault” and “Test” contacts leads to a short circuit on the DC residual current sensor. The DC residual current sensor is then no longer functional!