The 315-040 is an LED driver module that can be used in a wide variety of applications including as an interface with the Fire Alarm Control Panel (FACP) to drive most customized graphic annunciators. It comes in a plastic enclosure that may be mounted inside a custom annunciator or accessory cabinet and can drive up to 40 LEDs.

The 315-040 and the FACP communicate over a twowire serial interface employing the RS485 Repeater-Bus
communication format. An additional two wires are used for 24-volt DC power. A single four-conductor unshielded cable may be used for both power and data communications.

Up to eight RS485 Repeater-Bus devices may be connected to the RS485 Repeater-Bus of each FACP.