Rane HAL1x System Installation Manual
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cable ends. This in turn connects the HAL/audio equipment rack grounding point and the metal (if used) junctionbox mounting the RADs and DRs.NOTE: For some electrical systems (e.g., isolated grounding systems - sometimes called a single point or starground) the grounding procedure outlined above may short two fingers of the building ground system. If thiscreates a problem, then use of non-conductive junction boxes, or insulating mounting methods are rec-ommended (or very much required!).The following graphic illustrates the T568-B termination and also shows the function of each wire pair on theRAD/DR network:Momentary and Latching Toggle ConfigurationAll of the Logic inputs in the HAL system, including those in the HAL hosts, the DR4, and the DR5, allow youto configure each input port as a toggle and to specify them as either Momentary or Latching. What does thismean? When you have configured a Logic In port as a toggle, Halogen creates a corresponding toggle control inthe Control palette of the Processing Workspace. You can then link this toggle control to one or more other togglecontrols, which allows an external physical switch, relay, or another similar device to control the state of the tog-gle. For example, if you link a Logic In toggle control to the mute toggle control of an audio output processingblock, and then attach a physical two-position switch to the Logic In port, the end user can mute or unmute theaudio of the output block by changing the switch position.What is Momentary and how do I use it?One way to configure a Logic In port is to set it to Momentary. You use this setting if you intend to connect amomentary contact type of physical switch to the Logic In port, which could be a push button, for example. Witha normally open momentary push button switch, the switch contacts are open when no one is pushing on the but-ton and closed when someone pushes the button. Systems typically use these types of switches when the end userwishes to turn something on (for example open a wall) by pushing and releasing the button and then turning thesame thing off (close the wall) by pushing the button again.This is exactly what the HAL system does when you have configured a Logic In port to be a Toggle and set it toMomentary. In this case pressing the button the first time sets the state of the corresponding toggle control in theProcessing Workspace to ‘checked’ and pressing it again sets the toggle control to ‘unchecked’. The followingshows how this works in more detail using a DR5 input port, a momentary switch, and a Room Combine blockwall toggle.First, the following diagram shows how to connect two normally open, momentary push button switches to DR5Switch input ports. You should configure these ports as Momentary in the Hardware Workspace property dialogfor the DR5.HAL SYSTEM INSTALL GUIDE68 |
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