Allen-Bradley 5370-SC2 CompactLogix Security Reset Card

The Allen-Bradley 5370-SC2, also cataloged as the 5370SC2 reset card, operates as a dedicated hardware component for hardware-level password clearing and controller state security resetting within CompactLogix 5370 control systems.

Hardware Specifications

Allen-Bradley Control Bus and Security Execution

The 5370-SC2 security reset card is engineered to interface directly with the internal control bus architecture of Allen-Bradley CompactLogix 5370 controllers. Designed to execute physical hardware security overrides, the card initiates hardware memory line signaling upon targeted pin engagement to reset locked controller security registers to factory default states. The physical contact layer maintains backplane bus communication velocity while guaranteeing galvanic signal isolation during power cycling, preventing unintended firmware corruption or processor fault lockouts during maintenance operations.

Frequently Asked Questions

Q: Does installing the 5370-SC2 card erase the user project logic stored in non-volatile flash memory?

A: Yes. The hardware reset routine triggered by the 5370-SC2 security card clears controller password protection along with user project memory and network configuration parameters, reverting the processor to an unconfigured factory state.

Q: Can the 5370-SC2 security card remain permanently installed in the CompactLogix controller during standard operation?

A: No. The card is a maintenance utility intended for temporary insertion during hardware security unlock procedures. Leaving the reset card installed during routine machine operation will prevent persistent configuration storage upon system reboot.

Field Installation Guidelines

1. Remove main 24 VDC power from the CompactLogix 5370 controller and observe anti-static discharge (ESD) handling precautions prior to touching internal module slots.
2. Locate the designated internal security/reset interface header on the controller circuit board assembly.
3. Carefully align the 5370-SC2 card connector pins with the target socket, applying light pressure to seat the module flush against the header.
4. Apply power to the controller to execute the automated memory initialization and password reset sequence as indicated by the status LED sequence.
5. De-energize the system, remove the 5370-SC2 card, and restore power to re-establish normal firmware boot parameters and network settings.