Allen-Bradley SD833Allen-Bradley SD833 Power Supply Module
The Allen-Bradley SD833 , also cataloged as the SD833 Power Supply Module, operates as a dedicated hardware component for regulated DC power distribution and SELV/PELV bus powering within Allen-Bradley industrial control systems.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | SD833 |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 700 g (1.5 lbs) |
| Dimensions | 60 mm x 124 mm x 117 mm (2.36 in x 4.88 in x 4.61 in) |
| Operating Temp | Up to 55 deg C maximum |
| Power Consumption | Rated output power 240 W (Heat dissipation 22/24 W) |
| Product Type | Power Supply Units |
| Nominal Input Voltage | 100-120 VAC / 200-240 VAC (Auto-select input) |
| Rated Output Voltage | 24 VDC |
| Rated Output Current | 10 A (12 A peak at ambient temp < 45 deg C) |
| Energy Efficiency | 91.0% / 91.6% |
| Output Voltage Regulation | < 70 mV / < 100 mV at max current |
| Peak Ripple Noise | < 50 mV peak-to-peak |
| Voltage Holdup Time | 46 ms (120 VAC) / 47 ms (230 VAC) at mains blackout |
Backplane Bus Communication Velocity & Power Distribution
The SD833 power supply converts auto-selected 100-120 VAC or 200-240 VAC primary utility power into a regulated 24 VDC output, delivering up to 240 W of continuous power to drive PLC backplanes, discrete sensor loops, and operator interfaces. High energy efficiency ratings of up to 91.6% limit internal cabinet thermal heat dissipation, preserving system power density scaling and maintaining stable backplane bus communication velocity across connected I/O chassis. The module maintains full short-circuit protection and secondary voltage holdup execution to protect sensitive control hardware against transient AC line fluctuations.
Frequently Asked Questions
Q: Does the SD833 power supply require manual voltage selection for AC input ranges?
A: No, the SD833 incorporates auto-select AC input circuitry that automatically adjusts between 100-120 VAC and 200-240 VAC operating ranges.
Q: What is the maximum output current capacity of the SD833 under low ambient temperatures?
A: While rated for 10 A continuously, the SD833 can deliver up to 12 A of continuous output current in ambient thermal conditions below 45 deg C.
Field Installation Guidelines
- Disconnect all primary AC mains power feeds before mounting or wiring the SD833 power supply module inside the enclosure.
- Snap the power supply module securely onto a standard 35 mm DIN rail, observing minimum clearance spacing of 15 mm horizontally and 40 mm vertically for natural convection cooling.
- Wire primary AC mains input lines using copper conductors fused with a recommended 10-20 A external protection fuse.
- Terminal connections must be torqued to specified limits, separating 24 VDC output leads from high-noise AC line conductors to limit electromagnetic interference.
- Connect the earth ground terminal directly to the panel protective earth (PE) bus to ensure surge protection functionality and compliance with SELV/PELV installation standards.
Allen-Bradley SD833Allen-Bradley SD833 Power Supply Module
Allen-Bradley SD833Allen-Bradley SD833 Power Supply Module
The Allen-Bradley SD833 , also cataloged as the SD833 Power Supply Module, operates as a dedicated hardware component for regulated DC power distribution and SELV/PELV bus powering within Allen-Bradley industrial control systems.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | SD833 |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 700 g (1.5 lbs) |
| Dimensions | 60 mm x 124 mm x 117 mm (2.36 in x 4.88 in x 4.61 in) |
| Operating Temp | Up to 55 deg C maximum |
| Power Consumption | Rated output power 240 W (Heat dissipation 22/24 W) |
| Product Type | Power Supply Units |
| Nominal Input Voltage | 100-120 VAC / 200-240 VAC (Auto-select input) |
| Rated Output Voltage | 24 VDC |
| Rated Output Current | 10 A (12 A peak at ambient temp < 45 deg C) |
| Energy Efficiency | 91.0% / 91.6% |
| Output Voltage Regulation | < 70 mV / < 100 mV at max current |
| Peak Ripple Noise | < 50 mV peak-to-peak |
| Voltage Holdup Time | 46 ms (120 VAC) / 47 ms (230 VAC) at mains blackout |
Backplane Bus Communication Velocity & Power Distribution
The SD833 power supply converts auto-selected 100-120 VAC or 200-240 VAC primary utility power into a regulated 24 VDC output, delivering up to 240 W of continuous power to drive PLC backplanes, discrete sensor loops, and operator interfaces. High energy efficiency ratings of up to 91.6% limit internal cabinet thermal heat dissipation, preserving system power density scaling and maintaining stable backplane bus communication velocity across connected I/O chassis. The module maintains full short-circuit protection and secondary voltage holdup execution to protect sensitive control hardware against transient AC line fluctuations.
Frequently Asked Questions
Q: Does the SD833 power supply require manual voltage selection for AC input ranges?
A: No, the SD833 incorporates auto-select AC input circuitry that automatically adjusts between 100-120 VAC and 200-240 VAC operating ranges.
Q: What is the maximum output current capacity of the SD833 under low ambient temperatures?
A: While rated for 10 A continuously, the SD833 can deliver up to 12 A of continuous output current in ambient thermal conditions below 45 deg C.
Field Installation Guidelines
- Disconnect all primary AC mains power feeds before mounting or wiring the SD833 power supply module inside the enclosure.
- Snap the power supply module securely onto a standard 35 mm DIN rail, observing minimum clearance spacing of 15 mm horizontally and 40 mm vertically for natural convection cooling.
- Wire primary AC mains input lines using copper conductors fused with a recommended 10-20 A external protection fuse.
- Terminal connections must be torqued to specified limits, separating 24 VDC output leads from high-noise AC line conductors to limit electromagnetic interference.
- Connect the earth ground terminal directly to the panel protective earth (PE) bus to ensure surge protection functionality and compliance with SELV/PELV installation standards.
