Sync•Circuit™ Module The Sync•Circuit module synchronizes SpectrAlert® Advance strobes at 1 Hz and horns and chimes at temporal 3 over a single pair of wires. Patented module technology also allows the silencing of horns or chimes on horn/strobe and chime/strobe models over a pair of wires. Features •Two-wire operation from module to the devices •Silences horns and chimes over a two-wire loop •Synchronizes strobes at 1 Hz •Synchronizes horns and chimes to temporal 3 pattern •Patented technology •Interconnects modules for multiple zone synchronization •Module controls two Style Y (Class B) circuits or one Style Z (Class A) circuit •New NAC slave feature enables the interconnection of slave modules over a supervised NAC loop Agency Listings S4011 S5512 7300-1653:202 3032010 The MDL3 Module is designed to work with the SpectrAlert and SpectrAlert Advance series of notification appliances to provide a means of synchronizing the temporal-coded horns and chimes, synchronizing the one-second flash timing of the strobe, and silencing the horns and chimes of the horn/strobe and chime/ strobes combination over a two-wire circuit while leaving the strobes active. Application Flexibility. The Sync•Circuit module is designed to power and synchronize either two 3-amp circuits wired in Class B, or one 3-amp circuit powered as Class A. Should more than two zones require synchronization, additional modules can be added by interconnecting the “slave” input and output terminals between modules. Sync•Circuit™ Module Specifications Architectural/Engineering Specifications Synchronization Circuit Module shall be a System Sensor Sync•Circuit Model _________ listed to UL 464 and UL 1971 and shall be approved for fire protective service. The module shall synchronize SpectrAlert® or SpectrAlert Advance strobes at 1 Hz and horns at temporal 3. Also, the module shall be capable of silencing the horns on horn/strobe models, while operating the strobes, over a single pair of wires. The module shall be capable of mounting to a 411⁄16˝ × 411⁄16˝ × 21⁄8˝ back box and shall control two Style Y (class B) or one Style Z (class A) circuit. The module shall be capable of multiple zone synchronization by connecting multiple modules (slaves) together. Slaves can be driven from either the slave output of a prior MDL3 or from the NAC output of the master. Using the NAC enables all wiring to be supervised, whereas the slave-out terminals are not supervised, so their use is confined to specific applications. Note: The module shall not operate on a coded power supply. Physical Specifications Dimensions 51⁄4˝ L × 51⁄4˝ W Mounting 411⁄16˝ × 411⁄16˝ × 21⁄8˝ back box Indoor Operating Temperature 32° to 120° F (0° to 49° C) Electrical/Operating Specifications Operating Voltage 12 or 24 VDC and FWR unfiltered Operating Voltage Range (12 V) 8.5 to 17.5 VDC Operating Voltage Range (24 V) 16.5 to 33 VDC Maximum Load on Loop 3 Amps/zone U.S. Patent Nos. 5,598,139 5,850,178 Master-Slave Mode FACP + – NAC 1 NAC 2 } } B+ + + B– – – B+ + + B– – – + – } } } } ZONE 1 OUT ZONE 1 IN ZONE 2 OUT MASTER NAC SLAVE IN SLAVE IN SLAVE OUT } } } } + (STYLE Z CLASS A) NAC 3 } } – B+ + + B– – – A+ + A– – + – + – } } } } HORN CONTROL ZONE 1 OUT ZONE 1 IN ZONE 2 OUT SLAVE ZONE 2 IN SLAVE IN MASTER MODULE HORN CONTROL CONNECTS TO INTERRUPTABLE POWER SOURCE FACP #1 NAC 1 NAC 2 NAC 3 } } } B+ + B– – + EOL – B+ + + B– – – B+ + + B– – – + – } } } } HORN CONTROL ZONE 1 OUT ZONE 1 IN ZONE 2 OUT MASTER ZONE 2 IN NAC SLAVE IN SLAVE IN SLAVE OUT } } } } + TO NEXT SPECTRALERT ADVANCE DEVICE OR EOL – + 2 STYLE Y ZONES – (CLASS B) TO NEXT SPECTRALERT ADVANCE DEVICE OR EOL + – + WIRING MUST BE CONTAINED WITH EITHER THE COMMON ENCLOSURE OF MODULES OR ENCLOSURES WITHIN 20 FEET OF EACH OTHER WITH WIRING INSIDE CONDUIT – TEMP JUMP OFF FACP #2 + – NAC 1 } } B+ + + B– – – A+ + + A– – – + – } } } } HORN CONTROL ZONE 1 OUT ZONE 1 IN ZONE 2 OUT ZONE 2 IN NAC SLAVE IN SLAVE SLAVE IN SLAVE OUT } } } } + TO NEXT SPECTRALERT ADVANCE DEVICE – + – TO NEXT SPECTRALERT ADVANCE DEVICE + – STYLE Z ZONES + (CLASS A) – TEMP JUMP OFF + NAC SLAVE IN SLAVE OUT } } } } – (CLASS B) NAC 1 TO NEXT SPECTRALERT ADVANCE DEVICE OR EOL + – – + 2 STYLE Y ZONES – + FACP TO NEXT SPECTRALERT ADVANCE DEVICE OR EOL – TEMP JUMP OFF + 1. Any mix of Horn/Strobes, Chime/Strobes or Strobe-only devices is acceptable 2. Horn and chime control connects to interruptible power source Master-Slave Using NAC-Slave Input HORN CONTROL ZONE 2 IN Horns and Chimes Silenced Over Two-Wire Circuit NAC 2 WIRING MUST BE CONTAINED WITH EITHER THE COMMON ENCLOSURE OF MODULES OR ENCLOSURES WITHIN 20 FEET OF EACH OTHER WITH WIRING INSIDE CONDUIT } } B+ + B– – – B+ + + B– – – + – + TO NEXT SPECTRALERT ADVANCE DEVICE + – NAC 1 – TO NEXT SPECTRALERT ADVANCE DEVICE + – NAC 2 } } B+ + + B– – – B+ + + B– – – + STYLE Z ZONES + HORN CONTROL ZONE 1 OUT ZONE 1 IN ZONE 2 OUT ZONE 2 IN NAC SLAVE IN SLAVE SLAVE IN SLAVE OUT } } } } + – + – TO NEXT SPECTRALERT ADVANCE DEVICE OR EOL + TO NEXT MDL3 NAC – SLAVE IN OR EOL + 2 STYLE Y ZONES (CLASS B) – TEMP JUMP OFF FACP + – + } } } } TO NEXT SPECTRALERT ADVANCE DEVICE OR EOL (CLASS A) – – } } } } HORN CONTROL ZONE 1 OUT ZONE 1 IN ZONE 2 OUT ZONE 2 IN NAC SLAVE IN MASTER SLAVE IN SLAVE OUT } } } } + – + – TO NEXT SPECTRALERT ADVANCE DEVICE OR EOL + – + – TEMP JUMP OFF TEMP JUMP OFF Current Draw and Ordering Information Red White MDL3R, MDL3W, MDL3RA (Canadian) MDL3WA (Canadian) Voltage 12 24 Average Current (mA) DC FWR 10 12 12 15 Peak Current (mA) DC FWR 50 60 60 75 3825 Ohio Avenue • St. Charles, IL 60174 Phone: 800-SENSOR2 • Fax: 630-377-6495 In-rush Current (mA) DC FWR 100 120 120 150 NAC Slave Input (mA) DC FWR 3.5 4 4.5 5 ©2009 System Sensor. Product specifications subject to change without notice. Visit systemsensor.com for current product information, including the latest version of this data sheet. A05-1007-005 • 2/09 • #2030