This power supply module provides reliable DC power to the RX3i PLC system components. It converts 120/240 V AC input into regulated DC outputs. The unit supports the entire backplane and all installed I/O modules. Its high-efficiency design minimizes heat generation within the control cabinet.
Input and Output Specifications
The module accepts a wide range of AC input voltages for global deployment. It delivers multiple DC outputs to power different system components. The main output provides 5 V DC at 20 A for logic circuits. An auxiliary output supplies 24 V DC at 1.5 A for field devices.
| Parameter | Specification |
|---|---|
| Model | IC694PWR321B |
| Input Voltage | 85-264 V AC, 47-63 Hz |
| Input Current | 3.5 A at 120 V AC, 1.8 A at 240 V AC |
| Main Output | 5 V DC, 20 A (100 W) |
| Auxiliary Output | 24 V DC, 1.5 A (36 W) |
| Total Output Power | 136 W maximum |
| Output Ripple | ≤100 mV peak-to-peak |
| Line Regulation | ±0.2% for 5 V output |
| Load Regulation | ±1.0% for 5 V output |
| Efficiency | 82% typical at full load |
| Hold-Up Time | 20 ms minimum |
| Inrush Current | 30 A peak at 120 V AC |
Mechanical Dimensions and Rack Mounting
This power module measures 140 mm in height, 55 mm in width, and 140 mm in depth. It weighs approximately 1.2 kg for stable rack installation. You can mount the unit in the leftmost slot of the RX3i universal backplane. The locking mechanism secures the module firmly in place.
Connector Interface and Wiring Details
The IC694PWR321B features a 3-position terminal block for AC input connections. A separate connector provides access to the +5 V and +24 V outputs. Each terminal accepts solid or stranded wire from 0.5 mm² to 2.5 mm². The module also includes a functional ground terminal for noise suppression.
Protection Features and Safety Circuits
This power supply incorporates over-voltage protection on both output channels. It also includes over-current limiting with auto-recovery after fault removal. A thermal shutdown circuit protects the unit from excessive internal temperatures. The module meets UL 508 and CE safety standards.
Status Indication and Diagnostic Outputs
Three LEDs indicate power status and fault conditions on the front panel. A green LED illuminates when all outputs are within specification. A red LED signals an over-voltage or over-current fault condition. The unit also provides a DC OK relay contact for external monitoring.
Energy Storage and Backup Capability
Internal electrolytic capacitors store energy for the 20 ms hold-up time. This feature allows the system to survive brief AC power disturbances. The module also supports optional external battery backup for extended ride-through. These characteristics ensure continuous operation of critical control processes.
Details
| Weight | 0.65 kg |
|---|---|
| Dimensions | 140 × 110 × 75 mm |
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