P854 3BSE025349R1 ABB Power supply and communication management module AC 800M S800 I O

Product Overview

ABB P854 is the power and communication management module in the S800 I/O system, specifically designed for the TB854/TB855 redundant I/O baseboard. It not only provides stable and reliable + 5V and ± 15V logic power supplies for the connected DI/DO/AI/AO modules, but also manages the ModuleBus communication bus to ensure efficient and reliable transmission of I/O data between the modules and communication interfaces (such as CI854A).

Core features

Dual independent power supply input
Supports two 24V DC power inputs (L+1 / L+2)
Automatic switching, uninterrupted power supply
Built-in reverse polarity protection and overvoltage/overcurrent protection
Provide full-specification power supply for I/O modules
+ 5V DC: For digital module logic circuits
+ 15V / -15V DC: For the signal conditioning circuit of the analog module
Total output power: Meets the demand of up to 12 S800 I/O modules

Technical parameters

DCS of thermal/hydroelectric power plants: Redundant I/O stations for boilers, steam turbines, and auxiliary systems
Substation automation: High-availability acquisition and output of protection signals for high-voltage switches and transformers
Petrochemical process control: Reactor temperature, pressure and flow control circuit (SIL1/SIL2 environment)
Offshore platforms and LNG facilities: Key control nodes requiring "zero downtime" in extreme environments
Redundant monitoring of rectifier and feeder protection systems for rail transit traction power supply

Installation and Usage instructions
Hardware installation
Insert the two P854s into the left and right power slots of the TB854/TB855 base plate respectively.
Connect two independent 24V DC power supplies (it is recommended to come from different UPS or power systems);
Install S800 I/O modules (up to 12) on the right side of P854.
Install the CI854A optical fiber module in the communication slot of the base plate (redundant configuration is also required);
System configuration
Create redundant I/O stations in Control Builder M;
The software automatically recognizes P854 and the connected I/O module.
There is no need to configure P854 separately; its functions are automatically managed by the system.
Debugging and verification
The two P854 OK lights should remain constantly on, and the COMM lights should flash synchronously.
When one power supply is disconnected, the system should switch without interference and I/O data should be continuously updated.
If the FUSE light is on, check the polarity of the power supply, voltage or the internal fuse.

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