The Allen-Bradley 1747-L524, also cataloged as the 1747-L524 SLC 5/02 Processor Module, serves as the primary 1747-L524 CPU Processor utilized to execute central logic processing tasks across SLC 500 Modular Controllers platforms.
| Parameter | Specification |
|---|---|
| Model | 1747-L524 |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.38 lbs (0.17 kg) |
| Dimensions | 145 x 35 x 130 mm |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | Backplane current: 350 mA @ 5 VDC, 105 mA @ 24 VDC |
| User Memory | 4K words (Battery-backed RAM) |
| Discrete I/O Capacity | 4096 inputs and 4096 outputs |
| Max Local Slots | 30 slots (up to 3 local I/O chassis) |
| Typical Program Scan Time | 1.6 ms/K |
| Max I/O Scan Time | 1.6 ms |
| Communication Ports | DH-485 network port |
| Memory Backup Option | EEPROM |
| Program Scan Hold-up Time | 20 ms to 3 s (dependent on power supply loading) |
| Status Indicators | Run, CPU Fault, Forced, I/O, Battery Low, COMM |
The 1747-L524 executes localized instruction routines directly tied to the backplane bus communication velocity specifications of the SLC rack infrastructure. Configured to handle extensive register mapping, the hardware supports system expansion via networks like DH-485, interfacing with peripheral data modules on Profinet / EtherNet/IP deterministic networks via network gateway modules. To sustain predictable data cycles through the 30 available local slots, the central processor requires strict firmware flash compatibility verification across all distributed digital and analog I/O modules during initial rack configuration.
Q: What are the integrated memory retention limitations of the 1747-L524 if primary power is lost?
A: The standard onboard capacitor retains user memory for a duration of 2 weeks if unpowered under standard thermal conditions. For extended protection up to 5 years, an auxiliary 1747-BA lithium battery must be connected to the dedicated internal battery socket.
Q: Can this processor module be inserted or extracted from the SLC chassis while backplane power is active?
A: No. The SLC 500 hardware framework does not support Removal and Insertion Under Power (RIUP). Prior to removing or installing the processor module, the master chassis power supply must be entirely isolated to avoid physical destruction of the logic circuits or internal address lines.
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