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System
472
Function Card
Specs
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System
472 Back
to System 472
System 472 offers two types of Differential Multiplexer cards, one
with a programmable gain preamplifier on each channel, the other
with only a multiplexer to select one of sixteen channels.
32
Bit TTL Input - 472010 Back
to 472
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.
Specifications:
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
High-Level
Input Current: 20 mA max
Low-Level
Input Current: -400 mA max
Enable:
1000 ohm pull-up resistor
Outputs:
High-Level Output Voltage: 5.25 V max
Low-Level Output Voltage: 0.4 V max
High-Level
Output Current: 250mA max
Low-Level
Output Current: 40mA max
16
- Bit Isolated AC/DC Input - 472011 Back
to 472
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.
Specifications:
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-472012 Back
to 472
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.
Specifications:
Accuracy:
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 - 472013 Back
to 472
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.
Specifications:
Inputs:
High Level V in: 3.15Vmin, 5Vmax
Low Level V in: -1.5Vmin, - 0.9Vmax
Outputs:
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
Two-Channel
Frequency or Period Input - 472015 Back
to 472
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.
Specifications:
Accuracy:
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--472030 Back
to 472
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.
Specifications:
Open Circuit Voltage: +30 V max
Sink Current:
-40 mA max
Eight-Point
Form 'C' Relay Output--472031 Back
to 472
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.
Specifications
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 472
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% + ½LSB).
Static Crosstalk: 120
dB between channels, dc to 1 KHz 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 + 0.1 mV/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)² + RTO²]1/2
16-Channel
Programmable Preamp/Multiplexer Back
to 472
The 472060 is a high accuracy, low bandwidth card capable of accepting
full scale signal inputs ranging from ± 5mV to ± 10.24V in 12 programmable
gain steps. Accuracies to ± 3µV are achievable on the 5mV range.
It is equipped with a 3-pole 10Hz passive filter.
The 470059 16-Channel Differential Multiplexer Card accepts full
scale analog signals in the range of ± 2.56V, ± 5.12V and ± 10.24V
with no filtering.
Specifications: (System 472 with 472060 Installed)
Number of channels:
16 true differential input channels per
card, expandable to 2048 in 8 assemblies.
Input Configuration:
Balanced, differential. Input sources may
be grounded or floating.
Input Impedance:
10 megohms at dc.
Input Filter:
Passive RC filter on each channel; 3-pole,
low-pass with 18 dB/octave terminal slope;
-3 dB at 10 Hz.
Maximum Input Voltage: ± 30V Differential or common
mode. Power on or off.
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.
Ranges:
± 5mV to ± 10.24V in 12 binary steps; fully
programmable for each channel.
Full Scale Accuracy:
± (0.02% FS + 2 uV) for 120 hours at
calibration temperature ± 5°C. Includes
errors contributed by gain instability,
offset instability and non-linearity.
Resolution:
16-Bit, including sign (0.003% FS)
Noise:
± 1.5µV RTI or 1.5mV RTO
Specifications: (System 472 with 470059 installed)
Number of Channels:
16 true differential input channels per
card, expandable to 2048 in 8 assemblies.
Input Configuration:
Balanced, differential. Input sources may
be grounded or floating.
Input Impedance:
10 megohms at dc.
Input Filter:
470059 has no filter
Maximum Input Voltage: ± 30 V differential or
common mode.
Common Mode Rejection: 80 dB dc to 60 Hz with 350 ohm
source imbalance.
Ranges:
± 2.56V, ± 5.12V and ± 10.24V fully
programmable for each channel
ADC Resolution:
16-bits, including sign.
Accuracy After Cal.:
± 0.05% at constant temperature;
± 0.003%/° C after postamplifier calibration.
Dynamic Crosstalk:
74 dB worst case on adjacent channel in scan.
Zero Stability and Noise: ± 1.25mV RTO,
± 0.1mV/°C.
Two
Channel 16-Bit DAC 472070 Back
to 472
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.
Specifications:
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 472071 Back
to 472
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.
Specifications:
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 m V in 10 KHz bandwidth.
16-Channel
Isothermal - 472081 Back
to 472
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.
Specifications:
Reference Temperature:
1 mV/oC (Channel 00) referenced at 0oC
Reference Temperature Accuracy: ± 0.25oC over the range
of 10o to 45oC.
Thermocouple Inputs:
Channels 01 through 15.
Temperature Gradient:
0.1oC across terminations
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