# 4.3.2.2 Connection of I/O signals for the robot system (TBSYS1)

The I/O signals dedicated to the robot system are connected through TBSYS1, the terminal block of the safety control module.

![Figure 29 Connection of I/O signals for the robot system (TBSYS1)](https://1696510089-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MiyQmCk-2APhc5ujw_h%2F-MjXeaEoBuYo0oCQH5f4%2F-MjXeomSD9xdne5zmJ_g%2Fimage110.png?alt=media\&token=e548b170-3c90-4741-bf09-31e59e05b251)

\* The pins 3 through 8 and 11 through 16 are used as dedicated signals inside the control system.

<table data-header-hidden><thead><tr><th width="150" align="center">No.</th><th width="150" align="center">Name</th><th>Usage</th></tr></thead><tbody><tr><td align="center"><strong>No.</strong></td><td align="center"><strong>Name</strong></td><td>　　　　　　　<strong>Usage</strong></td></tr><tr><td align="center">1</td><td align="center">SF_POW1</td><td>Protective stop input common (Channel 1)</td></tr><tr><td align="center">2</td><td align="center">SF_POW2</td><td>Protective stop input common (Channel 2)</td></tr><tr><td align="center">3</td><td align="center">SF_POW1</td><td>Emergency stop input common (Channel 1) - Connection of the emergency stop switch of the control box</td></tr><tr><td align="center">4</td><td align="center">SF_POW2</td><td>Emergency stop input common (Channel 2) - Connection of the emergency stop switch of the control box</td></tr><tr><td align="center">5</td><td align="center">IN_POW1</td><td>PRIN input common</td></tr><tr><td align="center">6</td><td align="center">IN_POW2</td><td>Reserved signal input common</td></tr><tr><td align="center">7</td><td align="center">SF_GND1</td><td>PRON output common</td></tr><tr><td align="center">8</td><td align="center">SF_GND2</td><td>Reserved signal output common</td></tr><tr><td align="center">9</td><td align="center">SG1	</td><td>Protective stop input (Channel 1)</td></tr><tr><td align="center">10</td><td align="center">SG2 </td><td> Protective stop input (Channel 2)</td></tr><tr><td align="center">11</td><td align="center">ES1</td><td>Emergency stop input (Channel 1) - Connection of the emergency stop switch of the control box</td></tr><tr><td align="center">12</td><td align="center">ES2</td><td>Emergency stop input (Channel 2) - Connection of the emergency stop switch of the control box</td></tr><tr><td align="center">13</td><td align="center">/PRIN</td><td>Precharge relay state input</td></tr><tr><td align="center">14</td><td align="center">RSV_IN2</td><td>Reserved signal input</td></tr><tr><td align="center">15</td><td align="center">/PRON</td><td>Precharge relay actuation output</td></tr><tr><td align="center">16</td><td align="center">RSV_OUT2</td><td>Reserved signal output</td></tr></tbody></table>
