1771-DS Allen Bradley Latching Input Module
Specification
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Product Description
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The 1771-DS is a latching DC digital input module designed for high-speed pulse detection in PLC-5 systems. It captures very short input signals (pulses) and “latches” them so the PLC can reliably read them during the scan cycle.The 1771-DS is a specialized high-speed digital input module that ensures accurate detection of short-duration signals, making it ideal for precision industrial automation tasks.
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| More Technical Data |
| Input Voltage (Logic 1): |
10–27 V DC
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| Input Voltage (Logic 0): |
0–4 V DC
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| Optical Isolation: |
1500 V
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| Frequently Asked Questions |
1. What is a “latching” input module?
It captures very short signals and holds (latches) them until the PLC reads them, preventing missed inputs.
2. Why use 1771-DS instead of a standard input module?
Standard modules may miss fast pulses.
The 1771-DS ensures accurate detection of high-speed events.
3. What kind of signals can it detect?
- Optical sensor pulses
- Encoder signals
- Flow meter pulses
- Any short-duration DC signal
4. What is the minimum pulse width it can detect?
As low as 0.1 ms, depending on configuration.
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