ACI PHOTON4.1 Sensor Interface Device

The PHOTON4.1 interface has 4 outputs capable of controlling G.E.? RR7 or RR9 relay types (up to 10 per output) or Schlage Electronics or TOUCH-PLATE? 3000-PL relay type lighting contactors. It provides the necessary latch and unlatch pulses required by these contactors. Up to 255* PHOTON4.1s can be controlled and monitored over a single twisted pair of wires from a desktop PC or a building automation system computer. This enables a system of PHOTON4.1s to control a minimum of 1020 contactors (more if multiple relays per output). Each PHOTON4.1 has an 8-position DIP switch to set its individual address. Conforms to ACT protocol. Multiple PHOTON4.1s can be grouped in enclosures next to breaker panels, or mounted individually for remote circuit control. Optional ribbon cable(s) can be used to provide power and signal connection between PHOTON4.1s. Each PHOTON4.1 is supplied with snap track for mounting and requires 24 VAC for power. Local Overrides The PHOTON4.1 has momentary local override push buttons for each of the 4 outputs. The corresponding output is toggled on or off each time the local override button is pressed. Remote Override (Version 1 & 2 Only) Each PHOTON4.1 has 4 digital inputs for remote override. These require a momentary or maintained contact (specify when ordering). When an override input is made, the PHOTON4.1 will turn on the appropriate contactor, and flag the controlling CPU of the override. These digital inputs can also be used for monitoring RR9 pilot contacts or receiving a signal from digital output Current Transducers (CT's). The timed override can be set from 2 to 63 minutes. The lights will flash one minute before the override times out. Override off is not timed. Special Emergency "ALL ON" The PHOTON4.1 has a terminal connection for emergency "ALL ON", and requires a momentary contact to the "REMOTE ALL ON" terminals. This feature bypasses all electronic circuits and directly connects the power transformer to the contactors. This feature is useful in emergency situations where the host computer, or other electronic devices are inoperative. Contactor Status Indicators The PHOTON4.1 has an LED status indicator for each of the outputs that turns on or off with each latch or unlatch signal sent.

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