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12-15
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8
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7
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6
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3
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11
Signal Conditioning
12
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13
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15
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Ethernet I/O
Industrial Wiring Terminal Board
With CJC Circuit
PCLD-8115
PCLD-8710
Low-cost screw-terminal boards
Onboard CJC (Cold Junction Compensation) circuits for direct thermocouple
measurement.
Reserved space for signal-conditioning circuits such as low-pass filter, voltage
attenuator and current shunt.
Industrial-grade screw-clamp terminal blocks for heavy-duty and reliable
connections.
PCLD-8115 only
Supports PCL-818 series multifunction cards
Nylon standoffs, screws and washers included for easy mounting
Dimensions (W x L): 169 x 112 mm (6.7" x 4.4" )
PCLD-8710 only
Supports PCI-1710/1710L/1710HG/1710HGL/1711/1711L/1716/1716L cards
DIN-rail mounting case for easy mounting
Dimensions (W x L x H): 169 x 112 x 51 mm (6.7" x 4.4" x 2.0")
Applications
Field wiring for analog and digital I/O channels of PC-LabCard™ products.
Signal conditioning circuits can be implemented as illustrated in the following
examples:
a) Straight-through connection (factory setting)
RAn = 0
Ω (short)
RBn = none
Cn = none
b) 1.6 kHz (3 dB) low pass filter
RAn = 10 K
Ω
RBn = none
Cn = 0.01
μF
f3dB =
Introduction
The PCLD-8115 screw-terminal board offers convenient and reliable signal wiring for multifunction cards with 20-pin flat cable connectors or DB37 connectors, such as the PCL-
818 series cards. PCLD-8710 is designed to match multifunction cards with 68-pin SCSI-II connectors, such as the PCI-1710/1710L/1710HG/1710HGL/1711/1711L/1716/1716L
cards.
This screw-terminal board also includes cold junction sensing circuitry that allows direct measurements from thermocouple transducers. Together with software compensation and
linearization, every thermocouple type can be accommodated.
Due to its special PCB layout, you can install passive components to construct your own signal-conditioning circuits. So you can easily construct a low-pass filter, attenuator or
current shunt converter by adding resistors and capacitors onto the board circuit pads.
PCLD-8710 PCLD-8115
c) 10 : 1 voltage attenuator:
RAn = 9 K
Ω
RBn = 1 K
Ω
Cn = none
Attenuation =
(Assume source impedance << 10 KΩ)
d) 4 ~ 20 mA to 1 ~ 5 V
DC
signal converter:
RAn = 0
Ω (short)
RBn = 250
Ω (0.1% precision resistor)
Cn = none
Ordering Information
PCLD-8115 Industrial Wiring Terminal Board with CJC circuit and
DB37 cable assembly
PCLD-8710
Industrial Wiring Terminal Board with CJC circuit for
DIN-rail mounting (cable not included)
PCL-10137-1 DB37 cable assembly, 1 m
PCL-10137-2 DB37 cable assembly, 2 m
PCL-10137-3 DB37 cable assembly, 3 m
PCL-10168-1 68-pin SCSI-II cable with special shielding for noise
reduction, 1 m
PCL-10168-2 68-pin SCSI-II cable with special shielding for noise
reduction, 2 m
Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com
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