srs SIM900-Mainframe

srs SIM900-Mainframe

主要指标与说明SIM (Small Instrumentation Modules) is a robust, flexible platform in which up to eight high performance instruments share the same compact mainframe and computer interface. Unlike other modular systems, both front-panel and computer operation are possible. With SIM you get the functionality you need while avoiding the cost of unnecessary features. You configure your own system from a broad and growing selection of modules.

SIM900 MainframeRugged, compact design8 module slots9th port for remote module10 MHz reference with external syncCascade multiple mainframesGPIB and RS-232 interfacesStart-up script memorySIM900 MainframeSIM (Small Instrumentation Modules) is a robust, flexible platform in which up to eight high performance instruments share the same compact mainframe and computer interface. Unlike other modular systems, both front-panel and computer operation are possible. With SIM you get the functionality you need while avoiding the cost of unnecessary features. You configure your own system from a broad and growing selection of modules.The SIM900 Mainframe is the platform on which a SIM system is assembled. The mainframe provides power, computer interfaces, clock synchronization, and individual module status. Eight internal module slots accommodate single-width and double-width modules. For the occasional application needing a module right next to an experiment, a rear-panel connector and an interconnect cable permit operation of a 9th module outside the mainframe municationsThe mainframe comes with a standard RS-232 host interface and GPIB (IEEE-488.2) as an option. All commands and queries to individual modules are routed through the mainframe host interface. Messages are routed based on their port number, with the mainframe seamlessly relaying data to and from the appropriate destination. This messaging system is also used to communicate through the two auxiliary RS-232 ports. Using these ports, any number of SIM900 mainframes and other RS-232 instruments may be controlled through one host interface in the master mainframe. Each port in the mainframe has independent 511-byte input and output queues. The mainframe also performs any rate adaptation needed when communicating through the ports. A dedicated "eavesdrop" RS-232 port provides an echo of all communications to and from the mainframe to ease debugging of new setups.TimebaseThe mainframe provides a master 10 MHz clock to the modules which lock their internal timebases to this reference. The master clock in the SIM900 can be either free-running or phase-locked to an external 10 MHz reference through a rear-panel BNC input.Start-Up ScriptA 4000 byte start-up script is maintained in non-volatile memory in the SIM900. When enabled, the commands stored in the script are executed each time the mainframe is turned on. This provides a simple way to ensure all modules are automatically set to a desired starting configuration.

Front PanelFront-panel LED indicators provide status information for the mainframe and also monitor communications between the host and installed modules. Indicators display host interface, timebase, communications status, start-up script, and power information.Power SuppliesAll modules operate from various combinations of ±5 V, ±15 V and +24 V. These well regulated and filtered DC voltages are supplied by the mainframe power supply which is forced air cooled to maintain stable performance. All supplies are current limited with a trip-off circuit in case of an over voltage or short circuit. SIM900 MainframeSpecificationsModule slots 8Mainframe voltages ±15 VDC, ±5 VDC, +24 VDCCurrent limits 5 A (max.) for +5 VDC3 A (max.) for -5 VDC, ±15 VDC and +24 VDCPower limit 70 W total of all voltagesVoltage regulation ±0.5 %Internal timebase 10 MHz VCXO, ±10 ppmHost interfaces RS-232/DCEGPIB (optional)Module connector pins, DB15 (female) 1 Signal ground 2 -Status/service request 3 RTS flow ctrl 4 CTS flow ctrl 5 -10 MHz ref 6 -5 VDC 7 -15 VDC 8 Power ground 9 Chassis ground10 TXD async data11 RXD async data12 +10 MHz ref13 +5 VDC 14 +15 VDC15 +24 VDCIndicator lights Interface RS-232, GPIB Timebase Internal/External Lock, Fault Activity 8 slots, Remote SIM, Aux A, Aux B, Mainframe, Data Send, Data Receive, Data Error Start script Enabled Power On, Standby, Overload, TripOther connections Remote SIM DB15 connectorAux. RS-232/DTE (2 ports)Eavesdrop RS-232/DCE10 MHz timebase input BNCDIP switch for RS-232, GPIB & script enableChassis ground terminalOperating temperature 0 °C to 40 °C, non-condensingPower requirements 90 to 260 VAC, 47 to 63 Hz, 150 W (max.)Dimensions Mainframe 17.0" × 5.3" × 9.0" (WHL) Single-width module 1.5" × 3.6" × 7.0" (WHL) Double-width module 3.0" × 3.6" × 7.0" (WHL)Weight (empty) 12.6 lbs.Warranty One year parts and labor on defects in materials and workmanship

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