The 5B47 is a single-channel signal conditioning module that
interfaces, amplifies and filters J, K, T, E, R, S, and B-type
thermocouple. The module provides an isolated and protected
precision output of 0 to + 5 V.
The 5B47 internally linearizes its input signal to provide an
output that is linear with temperature. Accuracy for each type of
sensor is specified in the 5B47 model table. (See Model 5B37 for
non-linearized conditioning of thermocouple signals.)
Accurate and System-Ready
- Internal cold-junction
compensation largely corrects errors arising from parasitic
thermocouples formed by thermocouple connection to the
input screw terminals, providing an accuracy of +0.25
o
C @
+25
o
C ambient temperature. The module generates a
predictable upscale signal to indicate an open thermocouple; for
a downscale response, connect a 20MΩ, 0.25W resistor across
screw terminals 1 and 3.
The 5B47 protects the computer side from damage due to field-
side over-voltage faults. All models withstand 240V rms at their
input terminals without damage, thereby shielding computer-
side circuitry from field-side over-voltage conditions. Further,
the 5B47 is mix-and-match and hot-swappable with other 5B
Series modules, so can be inserted or removed from any socket
in the same backplane without disrupting system power.
Inside the 5B47 Module
– A chopper-stabilized input amplifier
provides low drift and stable gain. At the amplifier input, a
.
stable, laser-trimmed zero-scale input voltage is subtracted from
the input signal to set the zero-scale value. For user
convenience, the zero can be optionally factory-set to meet
custom needs. This allows suppression of a zero-scale input
value many times larger than the total span for precise
expanded-scale measurements.
Internal multi-pole low-pass filtering with a 4-Hz cutoff (-3 dB)
provides 60 dB of normal-mode rejection (noise on signal) and
enhancement of common-mode rejection (noise on signal
return) at 60 Hz, enabling accurate measurement of small
signals in high electrical noise.
Signal isolation by transformer coupling uses a proprietary
modulation technique for linear, stable and reliable
performance. The differential input circuit on the field side is
fully floating, eliminating the need for any input grounding. A
demodulator on the computer side of the signal transformer
recovers the original signal, which is then filtered and buffered
to provide a low-noise, low-impedance output signal. The
output common must be kept within +3 V of power common.
A series output switch eliminates the need for external
multiplexing in many applications. The switch is turned on by
an active-low enable input. If the switch is to be on at all times,
the enable-input should be grounded to power common as it is
on the 5B01 and 5B08 backplanes.
.
Figure 2
Rev. 0 | Page 2 of 8
5B47
5B47 Models Available
Model
5B47-J-01
5B47-J-02
5B47-J-03
5B47-K-04
5B47-K-05
5B47-T-06
5B47-T-07
5B47-E-08
5B47-R-09
5B47-S-10
5B47-B-11
5B47-Custom
1
Input Type
Type J
Type J
Type J
Type K
Type K
Type T
Type T
Type E
Type R
Type S
Type B
Type J, K, T, E, R, S, B
Input Range
0°C to +760°C (+32°F to +1400°F)
-100°C to +300°C (-148°F to +572°F)
0°C to +500°C (+32°F to +932°F)
0°C to +1000°C (+32°F to +1832°F)
0°C to +500°C (+32°F to +932°F)
-100°C to +400°C (-148°F to +752°F)
0°C to +200°C (+32°F to +392°F)
0°C to +1000°C (+32°F to +1832°F)
+500°C to +1750°C (+932°F to +3182°F)
+500°C to +1750°C (+932°F to +3182°F)
+500°C to +1800°C (+932°F to +3272°F)
*
Output Range
0 V to +5 V
0 V to +5 V
0 V to +5 V
0 V to +5 V
0 V to +5 V
0 V to +5 V
0 V to +5 V
0 V to +5 V
0 V to +5 V
0 V to +5 V
0 V to +5 V
*
Accuracy
1
±1.1°C
±0.5°C
±0.6°C
±1.3°C
±0.6°C
±1.4°C
±0.5°C
±1.7°C
±2.5°C
±2.4°C
±5.1°C
The CJC sensor accuracy should be added to the module accuracy for a system accuracy.
* Custom Input/Output ranges are available. Refer to configuration guide.
5B47 Specifications
Description
Input Ranges
Standard Ranges
Custom Ranges
Output Ranges (R
L
> 50 k
Ω)
Accuracy
1
Initial @ +25°C
Input Offset vs. Temperature
2
Output Offset vs. Temperature
Gain vs. Temperature
See Model Table
±1 µV/°C
±20 µV/°C
±0.0025% of Reading/°C
Cold Junction Compensation
Initial Accuracy @ +25°C
3
Accuracy, +5°C to +45°C
Input Bias Current
Input Resistance
Power On
Power Off
Overload
Noise
Input, 0.1 Hz to 10 Hz Bandwidth
0.2 µV rms
5M
Ω
40 k
Ω
40 k
Ω
±0.25°C (±0.75°C, maximum)
±0.5°C (±0.0125°C/°C)
-25 nA
Refer to Model Table
±5 mV to ±500 mV
+1 V to +5 V or 0 V to +5 V
Model 5B47
Rev. 0 | Page 3 of 8
5B47
Output, 100 kHz Bandwidth
Bandwidth, -3 dB
Output Rise Time, 10% to 90% Span
500 µV rms
4 Hz
200 ms
Common-Mode Voltage (CMV)
Input-to-Output, Continuous
Output-to-Power, Continuous
4
Transient
1500 V rms, maximum
±3 V, maximum
ANSI/IEEE C37.90.1-1989
Common Mode Rejection (CMR)
1 k
Ω
Source Imbalance, 50/60 Hz
Normal Mode Rejection (NMR), 50/60 Hz
160 dB
60 dB
Input Protection
Continuous
Transient
Output Resistance
Voltage Output Protection
Output Selection Time
240 V rms, maximum
ANSI/IEEE C37.90.1-1989
50
Ω
Continuous Short to Ground
6 µs @ C
load
= 0 to 2,000 pF
Output Enable Control
Max Logic "0"
Min Logic "1"
Max Logic "1"
Input Current "0"
Open Input Response
Open Input Response Time
Power Supply Voltage
Power Supply Current
Power Supply Sensitivity, RTI
Mechanical Dimensions
+1 V
+2.5 V
+36 V
0.4 mA
Upscale
10 seconds
+5 V ±5%
30 mA
±2 µV/% of V
s
2.275" x 2.375" x 0.595"
(57.8 mm x 59.1 mm x 15.1 mm)
Environmental
Temperature Range
Rated Performance
Operating
Storage
Relative Humidity
RFI Susceptibility
-25°C to +85°C
-40°C to +85°C
-40°C to +85°C
0 to 93% @ +40°C non-condensing
±0.5% Span error @ 400 MHz, 5 Watt, 3 ft
Includes the combined effects of repeatability, hysteresis, and nonlinearity and assumes R
L
> 50 k
Ω
. Loads heavier than 50 k
Ω
will degrade nonlinearity and gain temperature
coefficient.
2
±1 µV/°C is equivalent to 0.02°C/°C for Type J thermocouples; 0.025°C/°C for Type K and T thermocouples; 0.016°C/°C for Type E thermocouples; 0.168°C/°C for Type R and S
thermocouples.
3
When used with the model AC1361 CJC sensor (see Accessories section), which is provided on each channel of 5B Series backplanes and mounting cards.
4
The output common must be kept within ±3 V of power common.
Specifications subject to change without notice.
Rev. 0 | Page 4 of 8
5B47
PIN CONFIGURATIONS AND FUNCTIONAL DESCRIPTIONS
Figure 3 5B47 Input Field Connections
Table 1. Pin Function Descriptions—
Pin No.
1
2
3
4
Description
-EXC
LO
HI
N/C
Figure 4 . Model 5B Series Module, with pin-out assignments.
ESD CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human
body and test equipment and can discharge without detection. Although this product features proprietary ESD
protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges.
Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality.
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