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V470 ANALOG OUTPUT and THERMOCOUPLE SIMULATION VME MODULE Features

16 independent, galvanically isolated analog output channels. Each channel is independently programmable for mode and output range. Voltage mode: provides 16-bit resolution with programmable output voltage ranges from +-25 millivolts to +-12.5 volts. T/C simulation mode: simulates most common thermocouples: types J K E T R S B N. NIST-standard lookup tables are included to allow direct entry of simulated temperatures. Includes four non-isolated precision RTD signal conditioners for reference junction temperature sensing, plus one on-board reference junction sensor. Any thermocouple simulation channel can be associated with any reference. Any channel may be switched to a dedicated cal connector to allow in-system calibration check. VME interface operates at bus speed with no realtime handshaking. Supports one or two optional 8-channel J470 isothermal junction boxes, each with integral RTD reference junction sensor, or one or two J475 field-wiring interface boards. The V470 is 6U VME module that provides sixteen independent, isolated analog outputs that may be user-programmed to operate as voltage outputs or thermocouple simulators. Users may write temperature or voltage values at VMEbus speed, and the internal uP will transparently do all necessary calculations and update the channel electronics. In thermocouple simulation mode, the V470 includes lookup tables for all common thermocouple types, allowing users to write desired temperature directly to VME registers. Any channel can be associated with any of the reference junction sensors located in the external field-wiring termination panels, or can use the on-board sensor. Cold-junction compensation is via table lookup of thermocouple potential for the type currently selected. Reference junction temperatures are readable. Two front-panel D-25 connectors interface to external analog devices. Each connector provides eight differential outputs and connections for two 4-wire RTDs. A D9 connector allows in-crate calibration check.