User manual JAMO MANNO28, JCBA1

[. . . ] · 282/283/284/286 series of Emitters may be used in any combination. · Dimensions: 6" W x 2-1/4" D x 15/16" H INSTALLATION Fig. 2, next page, illustrates a typical installation of a 791-44 in an IR repeater system. [. . . ] 2 A typical 791-44 System d) The current for six emitters is 6 x 3 = 18 mA (in the low power mode. Also the 286 dual emitters count as only one, since they are in series). 2 791-44 e) Now add up all the currents from steps 1 through 4. NOTE: To avoid current "hogging", never connect regulated supplies, such as the 781RG or the 782-00, in parallel!CAUTION: Do not use unregulated 12V power supply adapters from other manufacturers. These may deliver excessive voltage to the IR receivers and cause them to "latch-up". When this occurs, the "talk-back" LEDs and 283 Blink IR's (if used) will stay on continuously!For clarity, connections in this illustration are shown going to a 3-conductor bus in a "daisy chain" fashion. In an actual installation, however, it is recommended that 4-conductor "home-runs" be pulled from each room to the 791-44 Connecting Block in the main room. This maintains higher power supply voltage to each IR receiver and keypad for best operation (plus a spare lead). The "IR RCVR" jack on the 791-44 allows the 490-30 (and other Xantech IR Receivers outfitted with a 3. 5 mm stereo mini plug) to be plugged directly into the 791-44. You can do this when the 791-44 Connecting Block is within reach of the IR receiver's cable -- such as when installing the 490-30 in a cabinet where the controlled equipment is behind closed doors. CAUTION: Plug only Xantech IR Receivers equip-ped with a stereo mini plug into the IR RCVR jack. CAUTION For Shielded Wire and Long Lead Lengths When using long lengths (> 50 feet) of inter-room shielded cable, it may be necessary to connect a 470 Ohm 1/8 Watt resistor between IR IN (signal) and GND at the 4-screw terminals of the 791-44. The resistor discharges the cable capacitance more quickly, allowing IR codes of high bit rates to pass without data loss for consistent command executions. Emitter Output Ports - High and Low Power Settings Ground Shield as shown +12 VDC GND S TAT U S IR IN Modules & Connecting Blocks 791-44 Input Terminals Shielded Cable(s) The emitter ports are driven in parallel with a choice of 470 Ohm to remote room(s) resistor either a 100 Ohm or a 470 Ohm resistor connected in series with each port. 3 Using a 470 Ohm Capacitance power output and the 470 Ohm setting is lower power. [. . . ] Cut the attached plug off the 12V adapter and connect the two leads to the STATUS and GND terminals on the 791-44 ("+" to STATUS, "­" to GND). Connect the 4-conductor inter-room cable between the 791-44, the Smart Pad2 or 3 and the 780-80 as shown in Fig. 6. If you wish to adjust the brightness of the Status LED on the 780-80, place a resistor in series with the STATUS lead as shown in Fig. [. . . ]