44/50 4 Zone Integrated Mixer Amplifier Installation & Operation Manual Cloud Electronics Limited 140 Staniforth Road, Sheffield, S9 3HF England Tel + 44 (0) 114 244 7051 Fax + 44 (0) 114 242 5462 E-mail info@cloud.co.uk Web site http://www.cloud.co.
44/50: Installation and Operation Manual 1 44/50 Integrated Four Zone Mixer Amplifier Installation and Operation manual Contents Section Page 1 Safety notes....................................................................................... 2 2 General description............................................................................ 2 3 Schematic diagram ............................................................................ 2 4 Installation .........................................
2 1 44/50: Installation and Operation Manual Safety Notes The Cloud 44/50 contains several PCB mounted jumpers which can be set to provide the desired configuration for a specific application; these adjustments should be performed by a technically qualified person who fully understands the hazards associated with mains operated equipment. Do not remove the top panel unless you are qualified to do so.
4/50: Installation and Operation Manual 4 3 Installation The Cloud 44/50 is suitable for mounting in a standard 19" equipment rack and occupies two units of rack space. Sufficient ventilation should be provided particularly where it is required to deliver a high output power for long periods of time; the unit draws cool air through the front panel and exhausts through the rear panel. The 44/50 is 300mm deep but a depth of 375mm should be allowed to clear connectors.
4 9 44/50: Installation and Operation Manual Line 4 Priority The Cloud 44/50 has a facility to allow fully automatic priority to a JukeBox or Spot Announce Player on Zone 1 only. A priority switch (concealed behind the removable plate on the front panel) is provided to select this facility.
44/50: Installation and Operation Manual 5 We suggest that the CPM-4 should be wired using 2-core screened cable directly to the MIC 1 XLR input and 6-core cable with overall screen to the 44/50 paging microphone connector (as shown below). As an alternative the CPM-4 can connect to the MIC 1 input stage via the 9 pin ‘D’ connector, using an 8-core screened cable. With the mic signals wired to Pin 5 and 9 see the right hand diagram. NOTE: This method is not recommended.
6 15 44/50: Installation and Operation Manual High Pass Filter Both microphone channels pass through independent 3 pole high pass filters operating at 100Hz that provide effective attenuation of breath blasts and LF handling noises at a rate of 18dB/octave. The circuitry providing this feature is fixed and cannot be defeated. 16 Microphone Level Controls Separate front panel mounted level controls for Mic 1 and Mic 2 are provided for each of the four zones.
44/50: Installation and Operation Manual 7 the module is configured for 100V output. Screw terminals are provided for the output connections. The module can be used at frequencies as low as 40Hz without the risk of saturation. Operation at high input levels at lower frequencies may result in the transformer saturating and the amplifiers VI limiter operating.
8 24 44/50: Installation and Operation Manual Music signal processing PCB When no remote control PCB (REM-4) is fitted, four circuit jumpers are fitted to the connector CON7; these jumpers must be removed before fitting the REM-4 module. If you wish to disable the music signals in any of the four zones, remove the relevant jumper from the connector CON7.
44/50: Installation and Operation Manual 9 RL-1 Wired to Operate Two Zones 27 Controlling two or more zones with one RSL-1 A single RSL-1 can be used to control more than one zone; however, the three resistors fitted to the RSL-1 will have to be replaced with a different value. Where a single RSL-1 is used to control two zones, the resistors R1, R2 & R3 should be removed and replaced with three 3k3 types.
10 29 44/50: Installation and Operation Manual Controlling the music functions using external DC control. When fitted with the optional REM-4 module, the 44/50 can be used as part of an automated sound system by controlling the music level and music source by an external 0-10V DC voltage. The 3-pole connector normally used to terminate the RSL-1 control plate can be used to feed two separate control voltages into the 44/50.
44/50: Installation and Operation Manual 31 11 Technical Specifications Line inputs Frequency Response Distortion Sensitivity Input Gain Control Input Impedance Headroom Noise Equalisation 20Hz-20kHz ±0.5dB <0.05% 20Hz -20kHz 195mV (-12dBu) to 2.0V (+8dBu) 20dB range 47kΩ >20dB -90dB A weighted (0dB gain) HF: ±10dB/10kHz LF: ±10dB/50Hz Microphone Inputs Frequency Response Distortion Gain Range Input Impedance Common mode rejection Headroom Noise Equalisation 100Hz / -3dB(filter) 20kHz ±0.5dB <0.
12 44/50: Installation and Operation Manual This product conforms to the following European Standards: EN 50081-1:1992 EN 50082-1:1992 EN 60065:1994 Safety Considerations THIS UNIT MUST BE EARTHED. ENSURE THAT THE MAINS POWER SUPPLY PROVIDES AN EFFECTIVE EARTH CONNECTION USING A THREE WIRE TERMINATION. Caution - Mains Fuse TO REDUCE THE RISK OF FIRE, REPLACE THE MAINS FUSE ONLY WITH THE SAME TYPE AND RATING, WHICH MUST BE A CLASS 3, 250V TIME DELAY TYPE, RATED AT 3.
