Allen-Bradley PLC-5 1785-MJ


AB PLC-5 EEPROM Cart. 1785M ECF Automation sources new and used Allen-Bradley controllers and components. If your part number is not listed email or call (800) 229-8119 for assistance.

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SKU: 1785-MJ Category:

h3>Processor Specifications

Backplane Current: 1785-L20C15: 2.7A @ 5Vdc1785-L40C15, -L46C15, -L80C15: 3.3A @ 5Vdc
Heat Dissipation: 1785-L20C15:54 BTU/hour1785-L40C15, -L46C15, -L80C15: 59 BTU/hour

Operating Temperature: IEC 60068-2-1 (Test Ad, Operating Cold),IEC 60068-2-2 (Test Bd, Operating Dry Heat),IEC 60068-2-14 (Test Nb, Operating Thermal Shock):0-60oC (32–140oF)

Storage Temperature: IEC 60068-2-1 (Test Ab, Un-packaged Non-operating Cold),IEC 60068-2-2 (Test Bc, Un-packaged Non-operating Dry Heat),IEC 60068-2-14 (Test Na, Un-packaged Non-operating Thermal Shock):–40 to 85oC (–40 to 185oF)

Relative Humidity: IEC 60068-2-30 (Test Db, Un-packaged Non-operatingDamp Heat):5–95% non condensing

Vibration: IEC60068-2-6 (Test Fc, Operating):2g @10–500Hz

Shock: IEC60068-2-27:1987, Test Ea (Unpackaged shock, ES#002)Operating – 30gNon-operating – 50g

Emissions: CISPR 11:Group 1, Class A

ESD Immunity: IEC 61000-4-2:4kV contact discharges

Radiated RF Immunity:IEC 61000-4-3:10V/m, 3V/m Broadcast Bands, with 1kHz sine-wave 80% AM from 30MHz to 1000Mhz

EFT/B Immunity:IEC 61000-4-4:+2kV at 5kHz on communications ports

Surge Transient Immunity: IEC 61000-4-5:+2kV line-earth(CM)on signal ports

Conducted RF Immunity: IEC 61000-4-6:10Vrms with 1kHz sine-wave 80%AM from 150kHzto 30MHz

Enclosure Type Rating: None (open style)

Time-of-Day Clock/Calendar: Maximum Variations at 60° C:± 5 min per monthTypical Variations at 20° C:± 20 s per monthTiming Accuracy:1 program scan

Available Cartridges: 1785-CHBM ControlNet Hot Backup Cartridge2(required for each processor used in a hot backup system)1785-RC Relay Cartridge

Battery: Allen-Bradley 1770-XYC

Memory Modules: 1785-ME32, 1785-ME64, 1785-M100

I/O Modules: Bulletin 1771 I/O, 1794 I/O, 1746 I/O, and 1791 I/O including 8-, 16-, 32-pt, and intelligent modules

Hardware Addressing:

  • Any mix of 8-pt modules
  • 16-pt modules must be I/O pairs
  • No 32-pt modules


  • Any mix of 8- or 16-pt modules
  • 32-pt modules must be I/O pairs

1/2-slot — Any mix of 8-,16-, or 32-pt modules


    • Serial
    • DH+
    • DH using 1785-KA
    • Remote I/O
    • ControlNet – Wire Category 2
    • Relay CartridgeWire – Category 1