GHL S-Port & L-Port Breakout Box The S-L-Port BoB makes it easy and convenient to connect signal lines to third-party devices with the S-Ports or L-Ports of the ProfiLux or the Expansion Box. L-ports (1-10V interfaces) can be used to connect controllable pumps or dimmable electronic ballasts, an application example for S-ports would be the control of...