&lt;p&gt;SL&amp;minus;240C is a compact master/space controller (Kramer Control brain) with PoE. It can operate over Ethernet with control interfaces that include: four bidirectional RS&amp;minus;232 four IR four GPI/O and four relays. It controls devices such as scalers video displays audio amplifiers Blu&amp;minus;ray players sensors screens shades door locks and lights. Multiple Kramer Ethernet control gateways can be used to add remote I/O ports.&lt;br /&gt; &lt;br /&gt;&amp;bull; Space Controller &amp;mdash; Controls any AV device/display with its corresponding logic.&lt;br /&gt;&amp;bull; High Performance Architecture &amp;mdash; Enables a scalable and flexible programming platform.&lt;br /&gt;&amp;bull; 4 RS&amp;ndash;232 Bidirectional Control Ports &amp;mdash; For controlling devices via bi&amp;ndash;directional serial control protocols.&lt;br /&gt;&amp;bull; 4 IR Emitter &amp; 1 IR Receiver Control Ports &amp;mdash; Control devices via IR control protocols and learn commands from IR remotes.&lt;br /&gt;&amp;bull; 4 GPI/O Control Ports &amp;mdash; Control devices via general purpose I/O ports program configured as digital input digital output or analog input interface for controlling sensors door locks audio volume and lighting control devices.&lt;br /&gt;&amp;bull; 4 Relay Control Ports &amp;mdash; Control devices via relay contact closure such as opening and closing drapes shades blinds and projection screen scrolling.&lt;br /&gt;&amp;bull; Resilient powering with PoE and optional PSU (not included).&lt;br /&gt;&amp;bull; Network Support &amp;mdash; 10/100/1000Mbps Ethernet.&lt;br /&gt;&amp;bull; LED Indicators &amp;mdash; I/O port state and system status.&lt;br /&gt;&amp;bull; Software Management Support &amp;mdash; Kramer Control API.&lt;/p&gt;