Simco Services Private Limited manufactures Highly Expandable Programmable Controller. Simco Services Private Limited is a part of Simco Group that supplies total solution for various product ranges in the respective fields. The Highly Expandable Programmable Controller uses the ultra-small RB1 relays, restricted I/O specifications and a fixed number of I/O points. The Highly Expandable Programmable Controller is available in four types of frames. The A frames [24- and 36-point types] are designed for small-scale standalone systems. The B frame [56-point type] and C frame [90-point type] are designed to be highly expandable. Users can select the optimum model according to the scale of the user`s system.