Description
The 51202330-200 is a Battery RAM Charger (RAM charger cable set) manufactured by Honeywell (Honeywell Process Solutions), designed to preserve controller program memory through mains power interruptions in Honeywell distributed control architectures. In its primary role, it backs up the program memory of the S8 C300 controller family within Experion PKS systems — charging the onboard NiMH backup battery and holding the contents of volatile RAM so that a controller can ride through a power failure and resume exactly where it left off.
Physically, the 51202330-200 is an 84-inch (≈2.1 m) pre-assembled cable set with regulated charger electronics, typically mounted adjacent to its associated C300 IOTA(s). A single unit can serve up to four physical S8 C300 controllers, with redundant power supply inputs available through a combo cable. It is the small, unglamorous component that stands between a momentary outage and a full controller reinitialisation — and in a process plant, that difference is measured in hours of downtime and thousands of lost dollars.
Application Scenarios
Imagine a pharmaceutical API batch plant in the middle of a 14-hour fermentation recipe. The Experion PKS system, built on C300 controllers, is executing dozens of sequential function charts, holding setpoints, accumulated totals, and the exact step number the process is on. Then the facility experiences a 90-second mains blip — a routine nuisance that has, in the past, meant restarting the recipe from step one and discarding the batch.
Because each C300 controller’s program memory is backed by a 51202330-200 RAM charger, the NiMH battery remains topped up and the RAM contents are preserved throughout the outage. When power returns, the controller resumes from the exact recipe step, with logic, configuration, and data intact — no reprogramming, no reinitialisation, no scrapped batch. The operator sees a transient alarm; the process sees nothing at all.
That is the practical value of the 51202330-200: it converts a power event that would be a process event into one that is merely an electrical footnote.
Parameter
| Main Parameters | Value / Description |
|---|---|
| Product Model | 51202330-200 |
| Manufacturer | Honeywell (Honeywell Process Solutions) |
| Product Category | Battery RAM Charger / RAM Charger Cable Set |
| Primary Function | Charge backup battery and maintain controller RAM contents during power failure |
| Supported Controller | S8 C300 controller (primary); also listed for HC900 controller |
| Controllers per Charger | Supports up to 4 physical S8 C300 controllers |
| Mounting Location | Adjacent to its associated C300 IOTA(s) |
| System Compatibility | Honeywell Experion PKS; TDC 3000 (legacy) |
| Cable Length | 84 inches (≈ 2.13 m / 7 ft) |
| Cable Assembly | Pre-assembled industrial cable with factory-fitted connectors |
| Input Voltage | 100–240 VAC (universal AC input, global compatibility) |
| Output Voltage | 24 VDC regulated |
| Output Current | 195 mA |
| Backup Battery Type | NiMH (Nickel-Metal Hydride) |
| Redundant Power Input | Supported through combo cable (per higher-authority source) |
| Alarm Support | Supports Experion soft-failure alarm for RAM-charger battery status |
| Diagnostics | Battery health reported via controller / Experion alarm system |
| Connector Type | Factory-installed Honeywell system connectors (keyed) |
| Weight | 0.06 kg (some sources cite 0.4–1.0 kg for assembled set) |
| Dimensions | 26 cm × 7 cm × 2 cm (packaged assembly) |
| Operating Temperature | -20 °C to +60 °C (-4 °F to +140 °F) |
| Storage Temperature | -40 °C to +85 °C (-40 °F to +185 °F) |
| Humidity | 0–95 % RH, non-condensing |
| Conductor Material | Copper conductors (industrial-grade insulation) |
| Country of Origin | USA |
| Compliance | CE (distributor-declared; validate per supplied unit) |
