User manual JAMO MANNO28, JCBA1

[. . . ] · Use of included jumpers connect either a 100 or a 470-Ohm resistor in series with each emitter jack for high or low power operation. · 282/283/284/286 series of Emitters may be used in any combination. · Power requirements: 12 volts DC. Uses 781RG or 782-00 Power Supplies (see item 3 below). [. . . ] c) The current for one 794 Interface module = 10 mA. 283M Blink-IRTM CD Changer GND +12 VDC 781RG Power Supply To 120 VAC (unswitched) XANTECH 286M Dual Blink-IRTM +12V GND2 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 910 GND1 ON IR IN UNIVERSAL INTERFACE 794 Cassette DecK 794-60 Universal Interface +12V 0 (OFF) 1 (ON) OUT SENDER/ EMITTER 286M Dual Blink-IRTM Dimmer Control Makita Drape Controller 282M Mouse Emitter MAIN ROOM, EQUIPMENT CABINET, ETC. Fig. 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. 10 mA + 85 mA + 10 mA + 18 mA = 123 mA total. Therefore, in this case, one 781RG power supply can be used. 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. Do not plug in emitters or other devices. To do so will destroy emitters and damage power supplies!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. [. . . ] Plug a 12V adapter, such as the Xantech 786-00 Power Supply, into a switched AC Outlet on the back of the A/V receiver (or integrated amplifier, preamp, etc. ). 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. [. . . ]