Allen Bradley FM1771 Filler Module

FAQ

Q1. What is the FM1771 used for?
It is a filler module used to occupy empty slots in a 1771 PLC I/O chassis.

Q2. Does FM1771 have any electrical function?
No, it has no electrical or control function. It is purely a placeholder module.

Q3. Why is a filler module needed in a PLC rack?
It maintains proper airflow, mechanical stability, and EMI shielding inside the rack.

Q4. Can I leave an empty slot without FM1771?
It is not recommended. Empty slots may affect cooling and system protection.

Q5. Is FM1771 still manufactured?
No, it is a legacy/discontinued part but still widely available in surplus markets.

Q6. Which systems use this module?
It is used in Allen-Bradley 1771 I/O chassis, typically PLC-5 systems.

Q7. Is wiring required for FM1771?
No wiring is required because it does not connect to the backplane.

Q8. What is the weight of FM1771?
Approximately 0.1–1.4 kg depending on version and construction

Allen Bradley FM1771

We will use wear-resistant cartons to seal the boxes, and take photos for your confirmation before sealing. We will pack the boxes only after confirmation.

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Please rest assured that we have a deep cooperation with express delivery companies and can ensure that your goods are delivered to you in good condition.