VMIVME-3230 Intelligent 8-Channel Thermocouple Board • Eight isolated, differential input channels • On-board 16-bit microcomputer • Linearization and cold junction compensation for thermocouple types J, K, T, E, R, S, B, N, W-Re • Accepts multiple thermocouple types simultaneously • High CMV isolation: 1,000 V • Dual port registers for minimum host overhead • High common-mode rejection: 120 dB at 60 Hz • Local or remote cold junction compensation • Program-selected measurement units, resolution, and data format • Nonvolatile storage of calibration parameters, eliminates channel adjustment potentiometers • A/D converter, 12 bits plus sign • Inputs Ţltered and normal mode protected to 130 VRMS • Optional high-level inputs available with provision for current loop termination • Built-in-Test (BIT) • GE Fanuc 90-70 series approval Addressing Scheme: This board is addressed as 16 contiguous, 16-bit registers, located on any APPLICATIONS 16-word boundary within the short supervisory or • Temperature measurement short nonprivileged I/O space. • Industrial control systems • Machinery instrumentation VMEbus Address ModiŢer: Address modiŢer • Current loop receiver lines are decoded to support either I/O access stated above. A single jumper is provided to support this INTRODUCTION — The VMIVME-3230 is an feature. It is factory conŢgured for short supervisory 8-channel low-level input board, speciŢcally designed for access. use with thermocouple inputs. The board performs reference (cold) junction temperature compensation and provides linearization for a variety of thermocouple types. All inputs are Ţltered and isolated, and are protected ORDERING INFORMATION against normal-mode overvoltage. An optional October 28, 1994 800-003230-000 F AB C – D E F conŢguration offers high-level inputs. The major – – VMIVME-3230 00 VMIVME-3230 functional blocks are illustrated in Figure 1. A = Input Options* 0 = 8 Thermocouple Channels 1 = 8 High-Level Channels, No Termination Resistors Thermocouple connections are made at a screw 2 = 8 High-Level Channels, with Termination Resistors terminal block which connects directly to the front panel 3 = 4 Thermocouple Channels 4 = 4 High-Level Channels, No Termination Resistors P3 connector. Provisions are also included for remotely 5 = 4 High-Level Channels, with Terminal Resistors Installed locating the thermocouple connections and cold junction BC = 00 (Options reserved for future use) sensor. INPUT CONNECTOR DATA FUNCTIONAL CHARACTERISTICS Connecting Component P3 (Phoenix) Compatible Mating Connector No. 17-57-19-0** Compliance: This product complies with the PC Board Header Connector 20-pin No. 17-57-42-0** VMEbus speciŢcation Rev. C. 1 with the following NOTES mnemonics: * Contact the factory for custom input voltage ranges between A16: D16: D08 (EO) Slave: 29, 2D –50 mV and –5 V. Form Factor: 6U ** Available from: Phoenix Terminal Blocks, Inc. P.O. Box 4100 Harrisburg, PA 17111 Board Address Selection: The base address of For Ordering Information, Call: the board is selected by 11 on-board jumpers. This 1-800-322-3616 or 1-205-880-0444 • FAX (205) 882-0859 board may be operated in any slot except slot one. Copyright © January 1986 by VMIC Specifications subject to change without notice. VME Microsystems International Corporation • 12090 South Memorial Parkway • Huntsville, Alabama 35803-3308 1 VMIVME-3230 Board IdentiŢcation: A Board IdentiŢcation Normal-Mode Rejection: 25 dB minimum, 60 Hz Register (BIR) contains a 16-bit VMIVME-3230 identiŢcation code. Input Resistance: 100 MW minimum with power applied, 35 kW with power removed, 100 W if Input Organization: User inputs to this board are current loop terminators are installed organized as eight differential, low-level, input signal pairs. Input Bias Current: 8 nA maximum ELECTRICAL SPECIFICATIONS AT 25 °C Input Noise: 2 Converter LSB pk-pk Number of Input Channels: Eight Calibration Provisions: Analog-to-Digital thermocouple channels plus reference sensor, or Converter (ADC) is calibrated automatically to an (optionally) eight high-level channels on-board standard. Inputs are Ţeld calibrated to “zero” and full-scale input conditions; calibration Analog Input Range Options: Full-scale ranges parameters are stored in nonvolatile memory. of –30 mV, –60 mV, and –90 mV, high-level input ranges of –50 mV and –5 V BOARD CONTROL AND STATUS REGISTER (CSR) Processing Accuracy: (See Table 1 for Mode Control: CSR bits 3, 2, and 1 establish the processing characteristics) VMIVME-3230 operating modes as: Continuous channel scanning Bandwidth: -3 dB at 2-5 Hz. Single scan Channel offset calibration Channel Scan Rate: 250 channel/sec minimum Channel range calibration (8 channels enabled) Reference (cold) junction calibration Open Input Detection (Thermocouple Sequence Initiation: Scan and calibration Inputs): Negative full-scale reading on open sequences are initiated by setting CSR bit 0 to “one”, channel or by an external TTL trigger at P3 if CSR bit 4 is set to “one”. Bit 0 is cleared automatically at the end of Channel Selection Settling Time: 4.0 msec to each sequence. 0.01 percent Software Reset: The on-board processor is forced Gain Error: –0.15 percent maximum (–40 PPM to the reset state while CSR bit 5 is set to “one”. per degree -C) Fail Indicator: Front panel indicator is OFF if CSR Gain Nonlinearity: –0.10 percent maximum bit 7 is “one”, and is ON if bit 7 is “zero”. Input Offset: –20 mV –0.025 percent FSR Built-in-Test (BIT): On-board BIT sequence is maximum (– 2 mV per °C) executed directly after a reset operation occurs. CSR bit 6 is set to “one” if the test fails, and is cleared to Isolation Voltage: –1,000 Vpk (750 Vrms) “zero” if the BIT is successful. VMIVME-3230 BIT maximum, 0 to 60 Hz veriŢes the correct operation of the: Analog multiplexer Common-Mode Rejection: 20 dB minimum; ADC Rs£100 W, F‡50 Hz Processor and memory Internal control and status ports Normal-Mode Protection: 130 Vrms continuous (7 Vrms for resistor-terminated high-level inputs). 2 For Ordering Information, Call: 1-800-322-3616 or 1-205-880-0444 • FAX (205) 882-0859 VMIVME-3230 CHANNEL CONTROL REGISTER (CCR) current by slewing to negative full-scale in approximately 10 seconds. Channel Mask: CCR bits 7 through 0 constitute an 8-bit channel enable mask, with each bit controlling PHYSICAL/ENVIRONMENTAL the corresponding channel number. A channel is enabled if the control bit is a “one”, and disabled Temperature: (not processed) if the control bit is a “zero”. Default 0 to +55 °C (Standard VME Slot), operating is FF HEX (all channels enabled). CCR bits 13 0 to 60 °C (1.6-in slot) through 8 control processed data resolution (LSB -40 to +85 °, storage weight) and measurement units. Humidity: 5 to 95 percent, relative noncondensing Data Coding: Coding of processed data is controlled by CCR bits D15 and D14 as: Altitude: Operation to 10,000 ft D15 D14 Data Coding Cooling: Forced-air convection (Standard VME 0 0 Offset Binary Slot) 0 1 Two’s complement Convection (1.6-in slot) 1 0 Complement of offset binary 1 1 Complement of two’s complement Dimensions: Double Height Eurocard (6U), Data is right-justiŢed, and the sign is extended 160 mm x 233.35 mm through the MSB (bit 15). Default value is “01” (Two’s complement). Vibration: 1 in; 5 to 10 Hz 1.0 g; 10 to 200 Hz DATA REGISTERS Input Connector (P3): 20-pin terminal connector Processed Data: A 16-bit Data Register is (refer to input connector data table in the Ordering provided for each of the eight input channels and for Information) the cold junction compensation sensor channel. Power Requirements: 2.0 A (typical) at Channel Calibration: In the calibration modes, +5.0 VDC (+0.25/-0.125 VDC) 2.5 A (maximum) the on-board processor adjusts the appropriate parameter (offset or gain) to produce the correct RELATED PRODUCTS AND APPLICATIONS — output. The Ţnal value of the calibration parameter is VMIC offers a broad range of Analog Input/Output (AIO) stored in nonvolatile memory. products for VME systems, and supports these products with comprehensive applications information. Contact VMIC for a To prevent accidental alteration of calibration description of current products and a list of application parameters, an on-board jumper must be in the guides. CAL-ENABLE position in order for the calibration sequence to be executed. GE-Fanuc 90-70 SERIES APPROVAL — VMIC has received approval for the VMIVME-3230 to be used with the Open Thermocouple Detection: GE-Fanuc 90-70 family of products. An Installation and Thermocouples which are exposed for long periods Integration Guide for the VMIVME-3230 is available from to vibration, high temperature, or corrosive VMIC. This guide details the Integration of the VMIVME-3230 atmospheres, are subject to failure in the open-circuit into the GE-Fanuc 90-70 family. mode. Open-circuit conditions also can occur due to loose connections or broken thermocouple wires. SPECIFYING FACTORY OPTIONS — To The resulting ţoating-sensor input will produce accommodate the variety of thermocouple requirements erroneous readings which may, or may not, be in the encountered in VME applications, the VMIVME-3230 Board expected range of measurement. can be supplied with the following options: The VMIVME-3230 Board addresses this potential Eight isolated high-level inputs (substituted for system problem by injecting a small negative bias thermocouple inputs), with provision for current loop current (4 nA) into all thermocouple channel inputs. termination resistors. An open thermocouple input responds to the bias Current loop termination resistors (100 W, 0.02 percent) VME Microsystems International Corporation • 12090 South Memorial Parkway • Huntsville, Alabama 35803-3308 3 VMIVME-3230 installed (available only with high-level inputs option). TRADEMARKS Four input channels instead of eight channels. The VMIC logo is a registered trademark of VME Microsystems International Corporation. Other The full part number is described under the registered trademarks are the property of their Ordering Information. respective owners. VOLTAGE REFERENCE FRONT PANEL CONNECTOR P3 REF (COLD) JUNCTION SIGNAL –5 V FSR ADC ANALOG 13 bits 13 MUX CHANNEL 0 INPUT 2 CHANNEL NODE (DIFF PAIR) ISOLATED (8 PAIRS) EIGHT ISOLATED SIGNAL MUX INPUT CHANNELS CONDITIONERS CHANNEL (8) SELECT CHANNEL 7 INPUT 2 EXTERNAL SYNC (TTL) EXTERNAL SYNC (TTL) CONTROL AND PROCESSING MODE INTERNAL LINEARIZATION CPU BUS 16 PROCESSOR VMEbus P1 IDB SEQUENCE COMPLETE VME 00 to 15 COMPATIBILITY CSR START SEQUENCE INTERFACE TRISTATE PDB 00 TO 15 DATA BUFFER 16 16 +5 VDC POWER ISOLATED CONVERTER–15 VDC Figure 1. VMIVME-3230 Intelligent 8-Channel Thermocouple Board Block Diagram 4 For Ordering Information, Call: 1-800-322-3616 or 1-205-880-0444 • FAX (205) 882-0859 VMIVME-3230 Table 1. VMIVME-3230 Thermocouple Processing Characteristics SELECT TEMP CODE TC RANGE RESOLUTION ACCURACY (DECIMAL) TYPE ALLOY FSR* (°C) (°C) (– °C)** 00 B Pt-6%Rh vs. Pt-30%Rh–30 mV 200 to 500 4.0 8 (Platinum - Rhodium) 500 to 1,000 2.0 5 1,000 to 1,800 2.0 4 01 E Chromel - Constantan–90 mV -250 to -200 2.0 10 -200 to -50 1.0 3 -50 to 500 0.5 2 500 to 1,000 6.5 5 02 J Iron - Constantan–60 mV -250 to 750 0.3 2 03 K Chromel - Alumenel–60 mV -250 to -200 0.9 2 -200 to -100 0.8 2 -100 to 1,300 0.5 2 04 N Nicrosil - Nisil–60 mV -250 to -100 2.0 10 -100 to 0 1.0 2 0 to 1,300 0.5 2 05 R Pt vs. Pt-13%Rh–30 mV 0 to 50 1.0 4 50 to 1,000 1.0 3 06 S Pt vs. Pt-10%Rh–30 mV 0 to 50 1.0 4 50 to 1,000 0.7 3 1,000 to 1,800 0.7 2 07 T Copper - Constantan–30 mV -250 to -200 1.0 3 -200 to 400 0.3 1 08 --- W vs. W-26%Re–60 mV 150 to 200 5.0 12 (Tungsten Rhenuim) 200 to 1,000 3.0 7 1,000 to 2,300 1.3 3 09 C W-5%Re vs. W-26%Re–60 mV 0 to 200 2.0 5 200 to 2,300 1.5 3 10 --- W-3%Re vs. W-25%Re–60 mV 0 to 200 2.0 5 200 to 1,000 2.0 4 1,000 to 2,300 1.3 2 11 --- (Reserved) 12 --- (Reserved) 13 --- (Linear Conversion)–30 mV 14 --- (Linear Conversion)–60 mV 15 --- (Linear Conversion)–90 mV * Jumper selected. **Error band increases –0.007 °C per degree - C deviation of the cold junction temperature from +25 °C. Local cold junction sensing (on-board sensor) can produce an additional uncertainty of 1.5 °C due to temperature differences between the sensor and the external mating connector. A remote sensor can reduce this uncertainty to 0.5 °C. VME Microsystems International Corporation • 12090 South Memorial Parkway • Huntsville, Alabama 35803-3308 5