eZiControl manufacture a range of IO converters for HVAC/BMS controllers under licence for iLED.
The IO modules allow BMS controllers to interface to relays, 24V AC split phase motors, PWM current valves and many other applications.
The range also has very cost effective DIN rail mounted relay board that takes 4 x E51 plug in relays. This reduces the cost of DIN relays in an electrical or BMS panel.
For more information contact firstname.lastname@example.org