Expandable ELCM controllers accommodate a mix of I/O and adapt for future I/O needs. ELCB controllers are designed for applications that do not require expandability and use 24 Vdc inputs and either relay or transistor outputs. In a brick-style enclosure, both have integrated 100–240 Vac power supplies, provide 24 Vdc for input sensors, and support an RS-232 communication port. ELCB supports a single RS-485 master/slave port; ELCM supports two RS-485 master/slave ports.
