Allen Bradley 1771-NIS/B PLC AC Digital Input Module

FAQ

Q1. What is the 1771-NIS/B used for?
It is used to interface 120 V AC field devices such as switches and relays with PLC-5 systems.

Q2. How many input channels does it provide?
It provides 16 isolated AC input channels.

Q3. What voltage range does it support?
It supports 85–132 V AC input signals.

Q4. What PLC system is it compatible with?
It is designed for Allen-Bradley PLC-5 systems using the 1771 I/O chassis.

Q5. What type of isolation does it use?
It uses optical isolation for improved noise immunity and safety.

Q6. What is the response time?
Typically around 8–25 ms depending on signal conditions.

Q7. What are the physical dimensions?
Approximately 152 mm × 51 mm × 279 mm.

Q8. What is the weight of the module?
Approximately 0.6 kg (about 1.3 lbs).

1771-NIS/B Allen Bradley

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