Product Short Description
Product Introduction
Redundant regulated DC power supply unit dedicated to DeltaV S-Series DCS rack backplane power delivery. Provides stabilized 12 V DC local bus power for I/O modules and isolated 24 V DC field circuit bussed power for field instrument transmitters, with hot-swappable redundant parallel operation capability.
Description
Technical & Electrical Specifications
- Input AC Supply Range: 85 V AC ~ 264 V AC universal industrial mains input
- Local Bus Output Rating: 12 V DC @ 250 mA stabilized
- Bussed Field Power Output Rating: 24 V DC @ 650 mA isolated SELV supply
- Redundancy Mode: N+1 parallel hot redundant operation with automatic load balancing
- Overcurrent / Overvoltage Protection: Hardware fuse and shutdown circuit protection
Mechanical & Material Specifications
- Mounting Format: DeltaV S-Series rack dedicated power supply slot plug-in module
- Housing Material: Black flame-retardant industrial ABS plastic
Environmental Parameters
- Operating Ambient Temperature: -20 °C ~ +60 °C
Function Features
- Dual isolated regulated power output: 12 V DC backplane local bus + 24 V DC field instrument bus power
- Hot-swappable redundant parallel operation permits single unit replacement without full rack power shutdown
- Built-in hardware overvoltage, overcurrent and short-circuit fault shutdown protection circuits
- Automatic load current balancing between parallel redundant power supply modules
- Visible front-panel LED status indication for power normal, fault, redundant active status
Working Principle
Universal AC mains input converted via isolated switching power converter topology to two independent stabilized DC output rails. First regulated 12 V DC rail supplies low-voltage power to DeltaV rack backplane local bus for all I/O and controller modules. Second galvanically isolated 24 V DC SELV rail provides power for field 2-wire transmitters connected to analog input I/O modules. Parallel redundant modules share load current evenly via internal communication handshake circuit; faulty unit automatically isolates without disrupting rack power delivery.
Advantage Highlights
- Combined dual-output design eliminates separate auxiliary 24 V DC field power supply hardware
- Hot redundant hot-swap design ensures uninterrupted DCS rack operation during power module maintenance
- Universal 85–264 V AC mains input compatible with all global industrial facility power grids
- Integrated hardware fault protection prevents downstream I/O module damage from supply fault conditions
Applicable Industries
All DeltaV DCS deployed process automation sectors: petrochemical, power generation, water treatment, pharmaceutical manufacturing, natural gas processing
Installation Requirements
- Install within dedicated power supply slots of DeltaV S-Series main control and expansion racks
- Populate minimum two KL2101X1-BA1 units per rack for full N+1 redundant power operation
- Connect AC mains input wiring via rack dedicated power terminal block with overcurrent circuit breaker protection
- Maintain minimum 20 mm vertical airflow clearance above power supply modules for heat dissipation
Usage Precautions
- Do not exceed combined total 650 mA maximum 24 V DC field bus output load per power supply unit
- Disconnect AC mains input power before removing module during non-redundant single-unit rack operation
- Avoid mounting adjacent to high heat-generating controller core modules without airflow separation
- Replace only with factory-original KL2101X1-BA1 redundant power supply modules
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