The RBK family of relay modules provides a proven, reliable means of connecting an auxiliary relay into a new or existing system without need for soldering or drilling within the control panel. The relay board has an LED for indication of relay activation and is constructed of a high grade fiberglass board. The sensitive relay modules are available in a low current trip version, capable of accepting a trip voltage of 3-48VDC (positive) or a ground or open collector (negative) while powered from any compatible operating voltage. Units are available with snaptrack mounting.