Expansion Module, 14 I/O, 240VAC, For Use With SR3 Logic Relays, Package Quantity 1 Logic Relays and Extension ModulesExpandable design allows users to manage a simple automation system with multiple inputs and outputs, without the need for a complex programmable controller. 6-button navigation allows direct programming in any of several computer languages. Compact, space-saving design. Extension modules add inputs and outputs to customize systems for specific needs. Programming software 1CNL6 and PC connection cable 1CNL7 permit uploading programs from a PC, directly to multiple relays. Use for small machinery and supplemental large machinery automation systems, lighting management, security systems management, and HVAC management.16 counters and timers Integral display