GE IC693PWR330 High Capacity Power Supply for Series 90-30 PLC

GE IC693PWR330: 30 W of +5 V Load in a Series 90-30 Rack

The IC693PWR330 exists because of one number: how much +5 V current the Series 90-30 rack can actually deliver. The standard power supplies in the range are sized for CPU, memory and a modest I/O complement. Add enough high-density I/O — or a high-speed counter module, or a motion option — and the standard supply runs out of +5 V current long before it runs out of wattage. The IC693PWR330 is the high-capacity member of the Series 90-30 power supply family, with up to 30 watts maximum output on the +5 VDC rail.

Three outputs come off this supply: +5 VDC at 5.0 to 5.2 VDC (5.1 VDC nominal), a +24 VDC relay output at 24 to 28 VDC, and an isolated +24 VDC output at 21.5 to 28 VDC. Output power is allocated as 30 watts maximum on +5 VDC, 15 watts maximum on the +24 VDC relay output and 20 watts maximum on the isolated +24 VDC output. That three-rail allocation is why this part is specified by load calculation rather than by wattage on a nameplate.

Discontinued Status Changes How This Part Gets Sourced

The IC693PWR330 is listed as discontinued/obsolete, which is the single most important fact on this page for a buyer. A discontinued supply module is not a stocked-catalogue item — it is a sustained-equipment part. The practical consequence is that availability has to be confirmed before an order is placed rather than assumed from the model number, and for a machine that must keep running it is worth holding a spare rather than depending on a single surviving unit.

The 20 milliseconds minimum holdup time is the other specification worth reading carefully on a discontinued part: it defines how long the rack rides through an input power interruption, which on older machinery with contactors and relays that take time to release can be the difference between a clean ride-through and a nuisance shutdown.

Choosing Between the Series 90-30 Power Supplies

Five power supply variants cover most Series 90-30 racks. The differences that matter are input voltage class and output allocation:

Related loads that drive +5 V current demand upward in an upgraded rack: the IC693PCM301 programmable coprocessor and the IC693MDL940 relay output module.

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How to Run the Load Calculation

Add the +5 V current draw of every module in the rack — CPU, each I/O module, memory, and any option module — and compare the total against the 30 watts maximum the +5 VDC rail can supply. The 5 VDC rail has its own overvoltage and over-current protective limit, so an overloaded rail does not simply deliver less: it trips. If the total sits close to the limit, the failure mode is not a clean power fault — it appears as intermittent I/O drops under load, which gets misdiagnosed as a communication problem or a loose backplane connector. Running the calculation before adding modules is cheaper than diagnosing that symptom afterwards.

Input Range and Inrush on an Aging Cabinet

Input voltage range is 85 to 264 VAC or 100 to 300 VDC, against a nominal rating of 120/240 VAC or 125 VDC. That range matters on older installations where supply voltage sags under motor starting load: if the cabinet measures outside the range at the supply terminals under load, the module is operating outside specification even though it tests fine on a bench. Inrush is 4 A peak for up to 250 milliseconds, which is the figure to compare against a cabinet main breaker or a selective-fuse calculation when this supply is added to an existing panel.

RS485 and Rack-Level Monitoring

RS485 protocol support is what lets the rack report supply status rather than only failing silently. On a machine where the power supply is the only component that can knock out every other module at once, having its condition visible in rack diagnostics shortens the time between the first symptom and a confirmed cause — and that visibility is worth confirming during commissioning, especially on a discontinued part where a failed unit may take time to replace.

Replacing an Existing Series 90-30 Supply

Before ordering, measure the input voltage available at the cabinet and compare it against the 85-264 VAC / 100-300 VDC ranges. A 48 VDC input supply is a different variant and is not interchangeable with this part. Then confirm the rack slot the supply occupies and the total +5 V rail load, because that calculation is what determines whether the PWR330 capacity is needed or whether a standard variant is sufficient. Given the discontinued lifecycle status, confirm current availability before committing a machine downtime window to this replacement.