| A new protected input for industrial automation |
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| Datasheet
| Orderable
Products | Features
and Description | Documentation |
| |
| Datasheet |
| Reference |
Title |
| PCLT-2A |
Dual current limited over-voltage
protected digital termination
(17 Nov 2005, 566KB) Download |
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| Orderable Products |
| Device |
Status |
RoHS |
Package |
Purchase |
| PCLT-2AT4 |
Active |
Converted |
TSSOP 14 |
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| PCLT-2AT4-TR |
Active |
Converted |
TSSOP 14 |
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| Features and Description |
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Reduced dissipation |
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By 45 % in the full chain |
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By 36 % in the CLT module |
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High module density |
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Compact with high integration |
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SMD package |
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Flexible solution |
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Type 1, 2, 3 input |
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CMOS / OPTO output drive |
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Higher reliability and robustness |
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Over-voltage proof, current controlled, reverse
polarity and wide temperature operation |
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Electro Magnetic Compliant:
IEC61000-4-2 on ESD, IEC61000-4-4 on transient burst and IEC61000-4-5
on Surge voltage |
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Enhanced operation |
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LED = true image of logic state |
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Insensitive to sensor impedance |
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Insensitive to 24V supply |
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Temperature compensated |
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The PCLT-2A, , built
on the well-proven ASD (Application Specific Devices)
technology, is a a new current limited over-voltage protected
digital termination for industrial automation device designed
for 24 V DC applications and achieves the front-end circuitry
of a digital input module (I/O) in industrial automation, such as
decentralized I/O module or PLC I/O's.
Available in a two channels configuration, it offers
a high-density termination by minimizing the conducting dissipation
and the external components count. It is housed in a surface mount
package to reduce the printed board size.
Made of an input voltage protection, a serial current limiting circuit
and an output interface, each channel circuit terminates the connection
between the logic input and its associated high side sensor or switch.The
PCLT-2A is compatible with the type 2 (7.5
mA) or type 3 (3 mA) characteristic of
the IEC61131-2 standard. An external resistance
RREF allows the limiting current value to be adjusted from 3 to
7.5 mA.
The unique structure of the PCLT limiter allows
its activation threshold to be low and insensitive to the output
voltage up to 2.5 V. Each input voltage clamping block protects
the module input against electromagnetic interferences such as those
described in the IEC61131-2 standard and IEC61000-4-2 (ESD), 4-4
(transient burst), 4-5 (voltage surge) and 4-6 (conducted radio
frequency interferences) standards. The supply input is also designed
with such a protection structure.
The PCLT sensor termination has been designedfor
I/O modules in factory automation. Its flexibility will allow designers
to develop a large variety ofinput types in isolated and non-isolated
versions.
With its robust protection and its current limiter, itis a low-loss
EMI-proof solution for highly integrated module interfacing with
proximity sensors. |
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Isolated PCLT in a PLC application
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| Documentation |
| Promotional Documents |
| Reference |
Title |
| FLSENSOR0606 |
PCLT-2A protects your sensor interface
(June 2006, 163K) Download |
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| |
| Product News |
Press Announcement, June 07, 2006
Sensor
Termination Chip from STMicroelectronics Improves Performance of
Automation Digital Inputs |
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