The 1756-PBXT ControlLogix XT Power Supply Module from Rockwell Automation is an industrial-grade 24V DC input power supply designed for ControlLogix-XT systems operating in extreme temperature and harsh industrial environments.
As part of the ControlLogix-XT (Extreme Temperature) platform, the 1756-PBXT is engineered to maintain stable backplane power under conditions where standard modules may not operate reliably. It is commonly used in oil & gas installations, offshore platforms, mining operations, heavy outdoor machinery, and extreme climate industrial automation systems.
This module delivers regulated DC power to ControlLogix chassis components, ensuring continuous PLC operation even in demanding environmental conditions.
Technical Specifications (Including Size & Weight)
| Parameter | Specification |
|---|---|
| Model | 1756-PBXT |
| Series | ControlLogix-XT Power Supplies |
| Module Type | 24V DC XT Power Supply |
| Input Voltage Range | 18–32V DC |
| Nominal Input Voltage | 24V DC |
| Maximum Output Power | ~52 W |
| Output Voltage (Backplane Rails) | 5.1V / 3.3V / 1.2V / 24V DC |
| 5.1V DC Current Capacity | 8 A |
| 3.3V DC Current Capacity | 4 A |
| 1.2V DC Current Capacity | 1.5 A |
| 24V DC Output Current | ~1.75 A |
| Inrush Current | Up to 30 A |
| Operating Temperature Range | -25°C to +70°C |
| Vibration Resistance | 2 g (10–500 Hz) |
| Shock Rating | 30 g operating |
| Isolation Voltage | 250V continuous |
| Mounting Position | Left side of ControlLogix XT chassis |
| Compatible Chassis | 1756-A4XT / A5XT / A7XT / A7LXT |
| Weight | ~0.95 kg |
(Technical values based on ControlLogix-XT specification documentation.)
Physical Dimensions
- Size (H × W × D): 140 × 112 × 145 mm
This compact XT-rated design maintains standard ControlLogix rack compatibility while adding reinforced construction for harsh environments.
Recommended Related Models
The 1756-PBXT is commonly paired with:
- 1756-PA75XT AC XT power supply
- 1756-L7XT ControlLogix-XT processors
- 1756-EN2TXT EtherNet/IP communication module
- 1756-IB16XT digital input modules
- 1756-OB16XT output modules
- 1756-A7XT / A10XT chassis systems
Popular Allen-Bradley ControlLogix-XT Power Modules
Common XT-series power solutions include:
- 1756-PBXT DC XT power supply module
- 1756-PA75XT AC XT power supply module
- 1756-PAXTR / PBXTR redundant XT power supplies
- Standard 1756-PA75 / PB75 ControlLogix supplies
These modules are designed for extended temperature and high-reliability industrial environments.
