Sweden The ABB PP846 is a Power Supply Module from the AC 800M family, which is part of ABB's larger IndustrialIT Extended Automation System 800xA. Its primary function is to provide stable, redundant, and highly reliable DC power to the controllers (like PM861, PM851) and other modules within an AC 800M rack.
| Parameter Category | Specification Details |
|---|---|
| Manufacturer | ABB |
| Product Type | Power Supply Module |
| Product Family | AC 800M (for System 800xA) |
| Order Number / Article Code | 3BSE042238R1 |
| Input Voltage | 85 - 264 V AC (wide range) |
| 110 - 300 V DC | |
| Input Frequency | 47 - 63 Hz |
| Output Voltage | +5.1 V DC (for processor logic) |
| +24 V DC (for field I/O and communication) | |
| Output Current | +5.1V: 6 A (max) |
| +24V: 1 A (max) | |
| Output Power | 60 W total (typical) |
| Redundancy | Yes, N+1 redundancy supported. Two PP846 units can be installed in a single rack to provide backup power. If one fails, the other seamlessly takes over without interrupting the control process. |
| Efficiency | Typically > 80% |
| Protection | Input: Under-voltage lockout, over-voltage protection. Output: Over-current protection, over-voltage protection, short-circuit protection. |
| Isolation | Input to output: 1500 V AC |
| Status Indicators (LEDs) | OK (Green): Normal operation. FAIL (Red): Power supply failure. AC OK (Green): Input AC voltage is present and within range. |
| Connection | Plug-in module for the AC 800M base unit (e.g., UNITEL, or standard rack). Connects via an internal connector; input power is typically wired to a terminal block on the rack's power distribution unit. |
| Operating Temperature | 0°C to +60°C (+32°F to +140°F) |
| Storage Temperature | -40°C to +70°C (-40°F to +158°F) |
| Relative Humidity | 5% to 95% (non-condensing) |
| Safety Standards | UL 508 (Industrial Control Equipment), CSA C22.2 No. 14, EN 61131-2 |
| EMC Immunity | EN 61000-6-2, EN 61326 |
| EMC Emissions | EN 61000-6-4 |
| Dimensions (H x W x D) | Approx. 45 x 130 x 125 mm (fits the standard AC 800M module form factor) |
| Mounting | Plug-in module into an AC 800M rack or base unit. |
Dual Outputs: The separate +5V and +24V outputs are crucial. The +5V powers the controller's brain (CPU and memory), while the +24V line powers the I/O modules, communication adapters, and any field devices that draw power from the rack.
Redundancy (N+1): This is a critical feature for high-availability systems in industries like power generation, oil & gas, and chemical processing. Installing two PP846 units ensures continuous operation even if one power supply fails.
Wide Input Range: The ability to accept anything from 85V to 264V AC makes it suitable for use anywhere in the world without needing jumpers or manual configuration.
Diagnostics: The LED indicators provide immediate visual feedback on the status of the power supply and the input voltage, enabling quick troubleshooting.
Rack Integration: It is designed specifically for the AC 800M system, ensuring perfect mechanical fit, electrical compatibility, and communication with the system's diagnostics.
The PP846 is used exclusively within ABB's control system environments:
Process Automation: Controlling continuous processes in chemical plants, refineries, pulp and paper mills.
Power Generation: Controlling turbines, boilers, and balance-of-plant systems.
Marine & Offshore: Power management and vessel control systems.
Water/Wastewater Treatment: Plant-wide control and automation.
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