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System 470
Function Card

  • SYSTEM 470           Back to System 470
    ADC Resolution:    16-bits, including sign.
    Gain Accuracy:       ± 0.05%.
    Gain Stability:         ± (0.01% + 0.003%/°C).
    Linearity:                ± (0.02% + ˝LSB).
    Static Crosstalk:    120dB between channels, dc to 1KHz with 350 ohm source; 10 V
                                     maximum non-overloaded input.
    Zero Offset:            ± 10 m V, channel-to-channel.
    Zero Stability:         ± (5 m V RTI + 1.25 mV RTO)± (0.5 m V/ oC RTI + 0.1mV/oC RTO).
    Noise:                      8.5mV RTI, 1.5mV RTO at 10 KHz Throughput
                                     3.7mV RTI, 1.5mV RTO at 1 KHz Throughput
    Noise =                    [(RTI x Gain)˛ + RTO˛]1/2


    32 Bit TTL Input - 470010           Back to 470
    This card reads 32 bits of input TTL data as two groups of 16 bits each. A Hold output signal handshakes with the device being read. Hold is a 10 mS pulse of selectable polarity asserted when either 16-bit group is to be read. This feature is especially useful when reading digitally-coded levels from a counter, DVM, clock, etc., which, if read in it's transitional state, would result in ambiguous data.
    An Enable input allows the user to decide when to update the card’s input register. All inputs and outputs interface with either standard or low power TTL logic. Jumper wires select positive true or negative true logic levels.


    Inputs:               High-Level Input Voltage: 2.0 V min; 5.0 V max
                               Low-Level Input Voltage: 0.0 V min; 0.8 V max
    Input Current:    20 mA max
    Input Current:   -400 mA max
    Enable:               1000 ohm pull-up
    Outputs:             High-Level Output Voltage: 5.25 V max
                                Low-Level Output Voltage: 0.4 V max
    Output Current: 250mA max
    Output Current: 40mA max


    16 - Bit Isolated AC/DC Input - 470011        Back to 470
    This 16-Point card accepts on/off input signals ranging from 12 V to 48 V, ac or dc, providing isolation between channels as well as from ground.


    Input Current:                  21 mA @ 48 V,  8.1 mA @ 24 V,  1.4 mA @ 12 V
    Common Mode Voltage: 1000 V max
    Response Time:               50 mS



    Two-Channel Frequency or Period Input-470012         Back to 470
    The Two-Channel Frequency or Period Input card accommodates inputs from tachometers, flowmeters, or other frequency-related devices. Frequency or period measurements or straight event counting are selectable by switches on the card.

    For flexibility, each channel accepts two types of inputs. One set of input terminals, for TTL logic levels, is optically coupled. The other input is intended for use with signal levels that vary with frequency. An event zero-crossing detector accepts inputs from ± 200 mV to ± 100 V at frequencies to 100 KHz.

    A crystal-controlled clock provides accurate time bases for measurements on both channels while each channel has its own 32K counter. After each measurement, the counter is reset. Frequency measurement involves counting the number of input pulses occurring between clock pulses.


    Frequency Mode:   ±0.01% of reading ±1 count
    Period Mode:        ±0.01% of reading ± input rise time (0.6 to 4V transition)
    Ranges (Max):
                                    Frequency Mode:   327Khz
                                    Period Mode:          32.7 Sec
                                    Count Mode:           32767 counts
    Sink Current:         16 mA max
    Common Mode:     ± 300 V max
    Frequency:             dc to 350 KHz
    Non-isolated Input:
                                    Input Voltage: ± 200 mV min; ± 100 V max
                                    Input Impedance: 50k ohms
                                    Frequency: dc to 100 KHz



    32 Bit TTL Input/Output - 470013         Back to 470
    The 32-Point TTL Input/Output card provides a 32-bit TTL level bus for user definition. The bus is divided into four bytes, each of which may be programmed separately as either input or output.


    High Level V in:      3.15Vmin, 5Vmax
    Low Level V in:      -1.5Vmin, - 0.9Vmax
    High Level V out:    2.4V min
    High Level I out:    -2.6mA max
    Low Level V out:     0.5V max
    Low Level I out:      24mA max



    ARINC-429 Controller 470014        Back to 470
    ARINC-429 Controller, 470014, is used to interface the System 470 to the ARINC-429, Mark33 Digital Information Transfer System (DITS) bus. It mounts in a standard System 470 function card slot and provides 4 receiver and 4 transmitter channels for communication with compatible devices.


    * Four receiver channels
    * Four transmitter channels
    * Received data sorted by Label
    * Data packet for interdependent Labels
    * Received data read by 470 scan list
    * SDI support
    * Both fast and slow bit rates supported



    Two-Channel Frequency or Period Input - 470015      Back to 470
    The Two-Channel Frequency or Period Input card accommodates inputs from tachometers, flowmeters, or other frequency-related devices. Operating modes include frequency measurement, period measurement and pulse counting. Selection of mode, clock frequency, number of periods included in the measurement and desired polarity are all programmable.

    For flexibility, each channel accepts two types of inputs. One set of input terminals, for TTL logic levels, is optically coupled. The other input is intended for use with signal levels that vary with frequency. An event zero-crossing detector accepts inputs from ±100 mV to ±100 V at frequencies to 100 KHz.


    Internal Time Base:        0.01% of nominal
    Frequency Mode:           0.01% of reading ±1 count
    Period Mode:                  0.1% of reading to 100mS 0.01% of reading
                                              to 1.0mS
    Event Counting Mode:   ±1 count
    Input Characteristics:
         Isolated TTL Input:
            Input Voltage:          ±5.25V, maximum
            Sink Current:           16mA, maximum
            Common-mode:      ±300V, maximum
            Frequency Range:  dc to 350KHz
        Level Detector Input:
            Input Voltage:          100mV, minimum to 100V, maximum
            Frequency Range:  dc to 100KHz



    32-Bit TTL Output--470030        Back to 470
    The 32-Bit TTL Output card provides two 16-bit outputs for driving TTL-compatible loads or other loads not exceeding output capability (30 V maximum; 40 mA maximum). Dual-rank registers permit the simultaneous updating of all outputs.

    All outputs are open-collector gates with pull-up resistors to the internal 5 V supply for driving standard TTL or 5 V CMOS loads. Placement of a jumper permits use of an external voltage source up to 28 V. Outputs can then interface to high voltage CMOS logic or be used to drive relay coils, lamps, or other loads not exceeding 40 mA.

    Output polarity of each group of eight outputs is determined by jumper placement. This allows the user to arrange logic polarity to any desired power-up/reset condition required by the application.


    Open Circuit Voltage: 
       +30 V max
    Sink Current:                  -40 mA max



    Eight-Point Form 'C' Relay Output--470031        Back to 470
    The Eight-Point Form-C Relay Output card provides eight three-wire form-C outputs (normally open, normally closed, and common) to drive various control devices. Each relay has a "set" and "reset" coil and is magnetically latched in its current state at power down. Eight control bits are used to address and control the relays individually. Dual-rank registers permit simultaneous updating of all relay states.


    Initial Contact Resistance:                30 milliOhm, max
    Maximum Contact Switching Power: 2000 VA, 150 W (resistive)
    Maximum Switching Voltage:            250 VAC
    Maximum Switching Current:            8 Amperes
    Breakdown Voltage:                          1000V between open contacts
                                                                 1000 V between contacts and ground
    Set/Reset Time:                                  8mS (approximately)



    16-Channel Differential Multiplexer Cards    Back to 470
    System 470 offers four types of differential multiplexer cards intended for analog signal inputs in full scale ranges of ± 5mV to ± 10.24V.

    Card 470050 is the basic differential multiplexer used for measuring voltages over the entire range; the others offer alternate input configurations. Card 470051 provides open source detection, 470052 is equipped with shunt resistors for measuring 4-20 mA inputs and 470059 has direct input (w/o filter).

    Except for 470059, the cards are equipped with two-pole, passive R-C filters having a terminal rolloff of 12 dB/octave. The -6 dB corner frequency of 10 Hz provides greater than 25 dB attenuation of input noise components at the 60 Hz power line frequency.

    The open source detection feature recognizes open thermocouples, broken wires and high resistance or open input connections. Card 470052 has a 250 Ohm shunt resistors on each channel for sensing 4-20 mA input.

    Specifications: (System 470 with 470050 Cards Installed)

    Number of Channels:         16 guarded differential input channels per card
                                                 Input sources may be grounded or floating.
    Input Impedance:                10 MegOhms: Power on or off.
    Input Filter:                         Passive RC filter on each channel;2-pole,
                                                 low-pass with 12 dB/octave terminal slope;
                                                 -6 dB at 10 Hz and -30 dB at 100 Hz.
    Maximum Input Voltage:   ± 30 V differential or common mode
    Common Mode Rejection: 120 dB (80 dB plus gain in dB to
                                                 120 dB max); dc to 60 Hz with 350
                                                 ohm source imbalance.
    Common Mode Voltage:    ± 10 V operating.
    ADC Resolution:                16-bits, including sign.
    Gain Accuracy:                   ± 0.05%.
    Gain Stability:                     ± (0.01% + 0.003%/°C).
    Linearity:                             ± (0.02% + ˝LSB).
    Static Crosstalk:                 120 dB between channels, dc to 1 KHz with
                                                  350 ohm source 10V maximum
                                                  non-overloaded input.
    Zero Offset:                         ± 10 mV, channel-to-channel.
    Zero Stability:                      ± (5 uV RTI + 1.25 mV RTO)
                                                  ± (0.5 uV/ oC RTI + 0.1 mV/oC RTO).
    Noise:                                   8.5 uV RTI, 1.5mV RTO at 10 KHz Throughput
                                                  3.7 uV RTI, 1.5mV RTO at 1 KHz Throughput
                                                  Noise = [(RTI x Gain)˛ + RTO˛]1/2



    4 Channel Conditioner/Multiplexer - 470054          Back to 470
    For bridge measurements using one, two, or four active arms, this card provides a precision excitation supply, balance control, and terminals for bridge completion, balance limit, and calibration resistors on each channel. Bridge completion resistor kits are available, see below.

    The card includes multiplexer switches and a standard two-pole RC filter, providing the same performance specifications as the 470050 16-Channel Multiplexer. One step shunt resistor calibration is programmable. Up to eight input leads plus shield can be used, giving the user the option of local or remote sensing. 

    Specifications: - Excitation Supply

    Voltage:                     Selectable; 5 V or 10 V.
    Current:                     100 mA max/channel; short circuit
                                        protected. 3.2 Amperes per control
                                        or expansion assembly.
    Line Regulation:        Less than 0.01% or 200mV, whichever is
                                        greater, for ±10% line voltage variation.
    Load Regulation:       Less than 0.01% or 200 m V, whichever is
                                        greater, for a no load to full load change.
    Stability:                     ± 0.01% at constant temperature; ± 0.005%/oC.
    Noise:                         Less than 200m V pk-pk in 10KHz bandwidth.
    Bridge Completion:   Terminals provided for four completion resistors.
    Test Points:                Front mounted jacks for Points: monitoring
                                        excitation and output voltages.
    Bridge Completion
    Resistor Kits:             350 or 120 ohm kits include three bridge
                                         completion and one balance limit resistors.



    Four Channel RTD Conditioner/Multiplexer - 470055   Back to 470
    The Four Channel RTD Conditioning/Multiplexer provides direct connection of 2, 3, and 4-wire, 100 ohm RTDs in a balanced bridge configuration. The card can be configured by jumper placement to accommodate current-excited 4-wire RTDs of values to 1k ohm.

    The card includes multiplexer switches, 10 Hz filter, and excitation source adjustment for each channel. Excitation current is 0.5 mA in the bridge configuration, or 1 mA in the constant current configuration, resulting in very low self-heating errors in the RTDs.

    Specifications: - Excitation Supply

    Current:                       1.0 mA adjustable +/- 1%
    Compliance Voltage:   0 to 3.5 Volts
    Line Regulation:          Less than 0.01% or 0.1mA,
                                          for a ±10% line voltage variation.
    Response:                    Output settles to within 1% of setting in
                                          less than 50 microseconds with a no-load
                                          to full-load change.
    Stability:                       ± 0.01% at constant temperature; ± 0.005%/oC.
    Output Impedance:      1 megOhm minimum
    Ripple:                          Less than 0.2mA peak-to-peak over
                                          the bandwidth dc to 1KHz.
    Test Points:                  Front mounted jacks for monitoring
                                          excitation and output voltages.



    16 Channel Transformer Coupled Multiplexer - 470056
    Back to 470
    The Transformer-Coupled Differential Multiplexer provides 16 channels of analog input for System 470. Each channel is galvanically isolated from other channels and from ground. Common mode voltages of up to 1000 V are rejected.

    Each channel features fully-guarded differential input allowing operation from either grounded or floating input sources. Two-pole, low pass filters approach 12 dB/octave terminal rolloff on each channel.

    Specifications: (System 470 with 470056 Card Installed)

    Number of Channels:          16 guarded differential input channels
                                                   Input sources may be floating or grounded.
    Input Filter:                            Passive RC filter on each channel; two-pole,
                       low-pass with terminal slope approaching
                                                  12 dB/octave; -6 dB at 10 Hz and -30 dB at
                                                  100 Hz.
    Input Impedance:                  5 megohms, minimum; power on or off.
    Isolation:                                Less than 100 pF from any input terminal to
                                                   ground. CMOS input switches are off with
                                                   system power removed.
    Maximum Input Voltage:      ± 30 V differential, without damage.
    Common Mode Voltage:     ±1000 V dc or peak ac.
    Common Mode Rejection:  100 dB + gain in dB to 120 dB max; dc to
                                                    60 Hz with up to 350 ohms source imbalance.
    Full Scale Accuracy:             ±0.05% of full scale at constant temperature,
    Linearity:                                Less than 0.05% of full scale deviation from
                                                    best fit straight line through zero and full scale.
    Zero Stability:                        ±(5 uV RTI + 1.25 mV RTO) at constant
                                                    ±(0.5 uV/oC RTI ± 0.1 mV/oC RTO).
    Zero Offset:                            ± 10 uV channel-to-channel.
    Noise (3 Sigma):                  10 uV peak RTI + 1.5 mV RTO.
    Resolution:                            16-bit resolution; 0.003% FS.
    Static Crosstalk:                   120 dB between any two channels; dc to
                                                    1 KHz.
    Dynamic Crosstalk:              110 dB to next channel in scan including
                                                    overload (up to 30 V input) and full scale
                                                    range changing.
    Sample Rate:                        20 samples/second/channel max to meet
                                                    all specifications, with up to 350 ohm
                                                    source resistance.
                                                    Note: System 470 sample rate must be
                                                    set to 10 KHz



    Two Channel 16-Bit DAC 470070         Back to 470
    The Two Channel DAC Output card provides two channels of analog output from System 470. Each channel consists of a 16-bit digital-to-analog converter (DAC) scaled to deliver ± 10.24 V output. Each output can deliver 20 mA of load current with remote sense leads provided to cancel line drops. Dual-rank registers permit simultaneous updating of both channels.


    Output Voltage:  ± 10.24 V full scale.
    Output Current:  ± 20 mA.
    Accuracy:            ± 0.02% of full scale. 
    Stability:              ± 0.005% of FS at constant temperature;
                                 0.001%/oC over 0 to 50oC.
    Resolution:          0.00305% FS/count (1 part in 32,768).  
    Noise:                  Less than 500 m V in 10 KHz bandwidth


    Sixteen Channel 12-Bit DAC 470071          Back to 470
    The 16 Channel DAC Output card provides 16 channels of analog output from System 470. Each channel consists of a 12-bit digital-to-analog converter (DAC) scaled to deliver ±10.24 V output. Each output can deliver 20 mA of load current with remote sense leads provided to cancel line drops.


    Output Voltage:  ± 10.24 V full scale.
    Output Current:   ± 20 mA.
    Accuracy:            ± 0.02% of full scale.
    Stability:              ± 0.005% of FS at constant temperature;
                                 0.001%/oC over 0 to 50oC. 
    Resolution:          0.05% FS/count (1 part in 2,048). 
    Noise:                  Less than 500 uV in 10 KHz bandwidth.



    16-Channel Isothermal - 470081         Back to 470
    The Isothermal Connector provides the means of terminating thermocouple input cables at the rear panel of the System 470. It can be used with any of the following analog input cards.
    470050 16 Channel Multiplexer 
    470051 16 Channel Multiplexer with Open Source Detection
    470056 16 Channel Transformer- Coupled Multiplexer
    472060 16 Channel Amplifier/Mux

    The Isothermal Connector plugs directly into the input (edge) connector of the analog input card. Thermocouple cables are brought into 15 sets of screw terminals on the connector, corresponding to multiplexer input channels 1 through 15. A temperature transducer in the connector supplies a reference voltage to channel 0 that is proportional to the termination temperature.

    The termination temperature and the type of thermocouple on each channel is the information the CPU requires to convert the thermocouple voltage to temperature. Since the conversion is under control of the CPU, thermocouple types can be mixed.


    Reference Temperature:                  1 mV/oC (Channel 00) referenced
                                                                at 0oC
    Reference Temperature Accuracy: ± 0.25oC over the range of 10o
                                                                 to 45oC.
    Accuracy:                                            ± 0.025% + 10 uV
    Thermocouple Inputs:                       Channels 01 through 15.
    Temperature Gradient:                     0.1oC across terminations



    Calibration Card - 470085           Back to 470
    The Calibration Card is a programmable dc voltage source used for calibration of the System 470. It can be installed in any function card slot. The card's output voltage is read through its analog multiplexer and is also output on the user I/O connector for use by external devices or for calibration of the card.

    Output voltage is programmable in three ranges from ±10.24 mV to ±10.24 V full scale. The voltage is derived from an on-board DAC driven by a 15-bit (plus sign) digital word from the host computer. The Calibration Card's address and voltage level is included in the output list formatted by the host and transferred to System 470. The card's address is included in the input scan list to read back the calibration voltage to the system.


    Range Resolution:  At  ± 10.24V - 312.5 mV
                                     At  ± 1.025V - 31.25mV
                                     At  ± 102.4V - 3.125mV
    Accuracy:                ± 0.025% FS + 10 m V.  
    Output Impedance: 50 ohms.  
    Load Resistance:    500k ohm minimum for specified accuracy.



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