User manual ELECTRO-VOICE 506A

[. . . ] Any work security regulations that are applicable at the location where the appliance is being serviced have to be strictly obeyed. All instructions concerning the handling of M O S - circuits have to be observed. Note: SAFETY COMPONENT (HAS TO BE REPLACED WITH ORIGINAL PART ONLY) Contents 1. Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Controls and Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] 25 Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 1. Description The 506A USB-CAN CONVERTER is a bi-directional USB-to-CAN interface converter and is therefore the perfect solution for interconnecting Electro-Voice appliances with serial CAN-busses and PC or Notebook computers. The 506A is a standalone unit with interface drivers for CAN and USB, audio monitoring output, USB and CAN controllers as well as microphone controllers for converting commands and data between PC and CAN-bus-units. The isolated CAN-bus interface reduces ground-loop interference noise to an absolute minimum. The 506A receives its operational power via USB from the connected PC, so that no external power supply unit is needed. This owner's manual illustrates installation and initial operation of the 506A when used together with Electro-Voice P-Series Remote Amplifiers. Keep this owner's manual at a save place for further reference. Characteristics · · · · · Data rate up to 500 kbit/s Galvanic separation of the CAN-bus, switchable 100 network devices possible Monitor-bus in network cabling; output signal via XLR-type connector Power supply via USB from the connected PC; separate power supply unit is not needed 17 2. Controls and Connections Fig. USB connector This connector is for the connection to the USB-port on your PC. The interface complies with the USB 1. 1 specifications and offers data transfer as well as operation voltage supply for the 506A. STATUS indicator The STATUS LED indicates the actual operational state of the 506A. The indicator lights when the 506A has been connected to the PC, the dedicated driver software has been installed, and the PC has recognized the unit. Each participant on the bus system has two RJ-45 connectors for the Remote CAN-bus. These sockets are connected in parallel to serve as input and output for carrying through the data information of the remote-network. The CAN-port follows balanced design, which makes the use of Twisted-Pair cables absolutely mandatory. Two CAN-TERM 120 Ù termination plugs are supplied with the 506A. Connect one of these each to the RJ-45 connector that is not in use of the first and the last appliance on CAN-bus. The following diagrams are examples of the system cabling for different order of size configurations: 20 Fig 4: System set-up with 5 amps and a single 506A / PC being the first unit on the bus Terminators at the 506A (first unit) and at the amp No. 5 (last unit on the bus) Fig 5: System set-up with 2 racks and a single 506A / PC in the middle Terminators at amp No. 12 (last unit on the bus) 21 Fig 6: System with several racks and several 506A / PCs 506A anywhere on the CAN-bus Terminators at amp No. 16 (last unit on the bus) 4. 4 ISOLATED / GROUNDED Switch Principally, the CAN-bus is galvanically isolated from any other participant on the bus, i. e. from all PSeries Remote amps and from the 506A USB-CAN Converter as well, a circumstance which as a matter of fact results in effective elimination of ground-loop interference noise. 22 The ISOLATED / GROUNDED switch located on the 506A's front panel allows bridging this galvanic isolation putting the CAN-bus of the 506A on circuitry ground potential. The CAN-bus should normally be referenced to the ground potential at one single point in the network. Set the switch to its GROUNDED-position when only one 506A is used in a single CANbus network. [. . . ] The following table shows the relation between baud rate and bus length: 24 Baud Rate 500 kbit/s 250 kbit/s 125 kbit/s 62, 5 kbit/s 20 kbit/s 10 kbit/s Bus Length 100 m 250 m 500 m 1000 m 2500 m 5000 m The use of repeaters is generally recommended when a network's bus length exceeds 1000 m. 6. 3 Maximum Cable Length on the CAN-Bus According to the ISO 11898-2 standard, CAN-bus data transfer cabling has to be carried out using Twisted-Pair cables with or without shielding providing a characteristic impedance of 120 Ù. Both ends of a CAN-network have to be terminated with 120 Ù termination plugs. The maximum bus length depends on the actual data transfer rate, which kind of data transfer cable is used and the total number of participants on the bus. The following table shows the most essential coherencies for CAN-networks consisting of up to 64 participants: Data Transfer Cable Bus Length Length-Related Resistance < 70 mÙ/m < 60 mÙ/m < 40 mÙ/m < 26 mÙ/m Cable Diameter 0, 25 . . . [. . . ]