Practical symptoms, checks and downtime exposure without extending the manufacturer specification.

Memory backup unavailable

Observe: The controller cannot rely on the documented hold-up function during a power-loss event.
Check: Verify RAM charger assembly condition, power cable and the controller backup cables before returning the system to service.
Risk: A power interruption may require a longer controller recovery and extend process downtime.

Incorrect cable length or mounting

Observe: The assembly cannot be routed according to the cabinet design.
Check: Apply the official 30-inch adjacent or 84-inch non-adjacent cabling guidance and respect the 55-inch power-cable limit.
Risk: Improvised routing can delay commissioning and make future maintenance harder.

C300 generation mismatch

Observe: A replacement is being planned for a CC-PCNT05/C300v5 controller.
Check: Stop and verify the controller generation; Honeywell requires CC-SCMB05 for CC-PCNT05.
Risk: Installing the older assembly in a C300v5 plan can prolong the outage because it is not compatible.

Model	CC-SCMB02
Product type	C300 Memory Backup Assembly
Published installation scope	For two or more C300 controllers
Controllers per RAM charger assembly	Up to two
Published backup duration	Up to 50 hours

RAM charger assembly	51199932-100
RAM charger mounting assembly	51202340-100; 3 in / 76 mm
30-inch controller cable	51202330-100; 0.7 m
84-inch controller cable	51202330-200; 2 m
55-inch power cable	51202331-100; 1.4 m

30-inch cable use	When mounted adjacent to the associated C300 IOTA on the same CCA
84-inch cable use	When not adjacent to the associated C300 IOTA on the same CCA
Controller connections	One or two C300 controllers per RAM charger assembly
Power-cable constraint	The 55-inch cable limits the documented cabinet mounting location

Honeywell CC-SCMB02 51199932-200 C300 Memory Backup Assembly

Honeywell C300 memory backup

Honeywell controller backup assembly

C300 memory backup with warranty

Honeywell C300 memory backup

Honeywell controller backup assembly

C300 memory backup with warranty

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Honeywell CC-SCMB05 51308657-106 51308658-276 Enhanced C300v5 Memory Backup Module

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Honeywell CC-HCN911 51307206-175 Horizontal 9-Port Control Firewall IOTA

CC-SCMB02 51199932-200

Technical Specifications

Compatibility & Replacement

Applications & Fault Scenarios

Memory backup unavailable

Incorrect cable length or mounting

C300 generation mismatch

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