Allen-Bradley 1746-P2

The Allen-Bradley 1746-P2 is the powerhouse for the SLC 500 system. Since you were just looking at the 1746-A13 (13-slot chassis), this is the exactly right power supply to pair with it—the smaller P1 usually isn’t enough to juice a full 13-slot rack!

Here is the breakdown for your inventory or technical check:

⚡ Technical Specifications

• Input Voltage: 85–132V AC or 170–265V AC (User-selectable via jumper).

• Output Current: * 5V DC: 5.0 Amps (This is the “brain” power for the modules).

  • 24V DC: 0.88 Amps (For internal relay and analog circuits).

• Backplane Capacity: Provides up to 25 Watts of power.

• Mounting: Left-most slot of any SLC 500 chassis (A4, A7, A10, or A13).

• Fuse: Built-in, user-replaceable 120/240V AC fuse.

🛠️ Maintenance & Value Tips

• Capacitor Check: Since these are older, “Legacy” units, the internal capacitors are the first things to go. If you’re selling these as “Tested,” checking for any bulging caps or testing the 5V/24V output under load is a huge selling point.

• Jumper Position: Always double-check if the jumper is set to 240V (common in Indian industrial setups) before testing to avoid blowing the internal fuse.

• Terminal Cover: Just like the NI16I terminal block, having the plastic flip-cover for the wiring terminals intact makes the unit much more attractive to buyers.

💰 Market Pulse

• Demand: Extremely high. Because it’s the power source for the entire rack, when a P2 fails, the whole machine stops.

• Surplus Status: These move very quickly in the Bhavnagar/Sihor markets because they are “plug-and-play” replacements for old shipboard systems.