Allen-Bradley 1771-RTP4 PLC Power Supply Module

FAQ

Q1. What is the 1771-P6S/B used for?
It provides regulated 5 V DC power to a PLC-5 1771 I/O chassis, often in redundant configurations for higher reliability.

Q2. What does the “/B” revision indicate?
It is a hardware revision version with internal improvements while maintaining full functional compatibility.

Q3. What is the output capacity?
It supplies up to 8 A at 5 V DC to the backplane.

Q4. What input voltage does it require?
It operates on 194–264 V AC, typically 220 V AC industrial supply.

Q5. Can two units be used together?
Yes, two modules can operate in parallel for redundancy using a load-sharing cable.

Q6. What happens if voltage drops?
It triggers a shutdown signal to protect PLC memory and system integrity.

Q7. What chassis is it compatible with?
It fits 1771-A series chassis such as A1B, A2B, A3B, A3B1, and A4B.

Q8. What are the physical size and weight?
Approximately 279 × 152 × 51 mm and about 1.0 kg (2.2 lbs).

1771-RTP4 Allen Bradley

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