TECHNICAL BRIEF - Iota Engineering

1 TECHNICAL BRIEFTECHNICAL BRIEFB rief #:Date:Product:Subject:IIS-15-0324 March 24, 2015 IIS Series InvertersDimming Relay OptionIOTA Engineering , BOX 11846 TUCSON, AZ 85734 1361 E. WIEDING ROAD TUCSON, AZ 85706 1-800-866-4682 FAX (520) 741-2837 Inverters with dimming Relay - INTERRUPTIBLE WITH DIMMER BYPASS120V277 VLOCAL SWITCH(IF PRESENT)ALTERNATEAC INPUTINVERTER WHT (NEUTRAL)ORG (277V)BLK (120V)FLYING LEADSGROUNDWIREYELLOW (277V)VIOLET (120V)GRAY (NEUTRAL)GREENNORMAL CIRCUITEMERGENCY CIRCUITNORMALLIGHTING LOADDESIGNATEDEMERGENCY LOADINPUT LEADSVIOLETBLK (120V)WHT (NEU)OUTPUT LEADSBRANCHCIRCUITOPERATES IN BOTH NORMAL AND EMERGENCY MODES. CIRCUIT MUST BE ISOLATED FROM NORMAL (NORMALLY OPEN)RED (COMMON)BRN (NORMALLY CLOSED)DIMMER CONTROLDIMMINGRELAYLEADSPRIMARYUNSWITCHE DINPUTGRAYVIOLETGRAYORG (277V)The dimming Relay contacts provide electrical continuity during normal power conditions allowing your dimming signal to operate the luminaire in the desired, dimmed state.

2 When the inverter transfers into the emergency mode, the dimming relay contacts electrically open the 0-10 dimming reference signal forcing the luminaire to operate at full lumen output regardless of dimmer PROPER VOLTAGE LEAD AND CAP UNUSED WIRE - CONNECT FIXTURE SUPPLY GROUND AND UNIT GROUND IN ACCORDANCE WITH LOCAL AND NATIONAL USING A SECONDARY AC INPUT, SELECT PROPER VOLTAGE LEAD AND CAP UNUSED A 277V RATED SWITCH IF CONNECTING TO 277V LEADS - SELECT PROPER VOLTAGE LEAD AND CAP UNUSED UNUSED 1 - Dimmer BypassThe dimming Relay contacts provide electrical continuity during normal power conditions allowing your dimming signal to operate the luminaire in the desired, dimmed state. When the inverter transfers into the emergency mode, the dimming relay contacts electrically open the 0-10 dimming reference signal forcing the luminaire to operate at full lumen output regardless of dimmer - INTERRUPTIBLE WITH EMERGENCY dimming SIGNAL120V277 VLOCAL SWITCH(IF PRESENT)ALTERNATEAC INPUTINVERTER WHT (NEUTRAL)ORG (277V)BLK (120V)FLYING LEADSGROUNDWIREYELLOW (277V)VIOLET (120V)GRAY (NEUTRAL)GREENNORMAL CIRCUITEMERGENCY CIRCUITNORMALLIGHTING LOADDESIGNATEDEMERGENCY LOADINPUT LEADSVIOLETBLK (120V)WHT (NEU)OUTPUT LEADSBRANCHCIRCUITOPERATES IN BOTH NORMAL AND EMERGENCY MODES.

3 CIRCUIT MUST BE ISOLATED FROM NORMAL (NORMALLY OPEN)RED (COMMON)BRN (NORMALLY CLOSED)DIMMER CONTROLDIMMINGRELAYLEADSPRIMARYUNSWITCHE DINPUTGRAYVIOLETGRAYORG (277V)The dimming Relay contacts are electrically open during normal power conditions allowing your dimming signal to operate the luminaire in the desired, dimmed state. When the inverter transfers into the emergency mode, the dimming relay contacts electrically short the 0-10 dimming reference signal forcing the luminaire to operate at a reduced lumen output setting based on the dimmable driver being used. Verify operating results of the luminaire with the 0-10 volt reference signal shorted to assure the application and mounting height produce code-compliant egress PROPER VOLTAGE LEAD AND CAP UNUSED WIRE - CONNECT FIXTURE SUPPLY GROUND AND UNIT GROUND IN ACCORDANCE WITH LOCAL AND NATIONAL USING A SECONDARY AC INPUT, SELECT PROPER VOLTAGE LEAD AND CAP UNUSED A 277V RATED SWITCH IF CONNECTING TO 277V LEADS - SELECT PROPER VOLTAGE LEAD AND CAP UNUSED UNUSED 2 - EM dimming SignalThe dimming Relay contacts are electrically open during normal power conditions allowing your dimming signal to operate the lumi-naire in the desired, dimmed state.

4 When the inverter transfers into the emergency mode, the dimming relay contacts electrically short the 0-10 dimming reference signal forcing the luminaire to operate at a reduced lumen output setting based on the dimmable driver being used. Verify operating results of the luminaire with the 0-10 volt reference signal shorted to assure the application and mounting height produce code-compliant egress DR dimming Relay Option for IOTA IIS Series Inverters provides additional capability when used with dimming controls. The DR option can be used as either a Dimmer Bypass or to accommodate an EM dimming Signal. Refer to the descriptions and diagrams below for application de-tails. The dimming Relay is available as an additional option on select IIS Inverter Models (IIS-125, IIS-375-LED, and IIS-550-I). Add the -DR suffix to specify the dimming Relay -DR to Model Number when requiring the dimming Relay