# 4.3.4.1 Connection and display

The connector layout, usage, and connecting devices used by the RDM are as follows:

<table data-header-hidden><thead><tr><th width="173.66666666666666" align="center">Connector</th><th>Usage</th><th align="center">External connecting device</th></tr></thead><tbody><tr><td align="center"><strong>Connector</strong></td><td>　　　　　<strong>Usage</strong></td><td align="center"><strong>External connecting device</strong></td></tr><tr><td align="center">CNPM3</td><td>Connection of 48 V DC power line (for the motor) </td><td align="center">Power precharge module (PPM) CNPM3</td></tr><tr><td align="center">CNRDM</td><td>Connection of state information signals</td><td align="center">Safety control module (SCM) CNPMD</td></tr></tbody></table>

The details of the state display of the RDM are as follows:

<table data-header-hidden><thead><tr><th width="150" align="center">LED</th><th>Usage</th><th align="center">Display details (lamp state)</th></tr></thead><tbody><tr><td align="center"><strong>LED</strong></td><td>　　　　　<strong>Usage</strong></td><td align="center"><strong>Display details (lamp state)</strong></td></tr><tr><td align="center">LED7</td><td>Detection of overheating of the regenerative discharge resistor or overcurrent of the discharge current</td><td align="center"><p>Overheating of the regenerative discharge resistor (95°C)</p><p>or Overcurrent of the discharge current (15 A)</p><p></p></td></tr><tr><td align="center">LED8</td><td>Detection of disconnection of the regenerative discharge resistor</td><td align="center">The regenerative discharge resistor is disconnected (displayed even during the regenerative discharge operation)</td></tr><tr><td align="center">LED9</td><td>Detection of the regenerative discharge operation</td><td align="center">Under regenerative discharge operation</td></tr><tr><td align="center">LED10</td><td>Detection of regenerative discharge overtime</td><td align="center">Occurrence of regenerative discharge operation for 10 ms or longer</td></tr></tbody></table>
