KJ1501X1-BC3 Emerson Power Supply Module | Industrial Power Solution

Emerson KJ1501X1-BC3 | DeltaV System Dual DC Power Supply

The Emerson KJ1501X1-BC3 is a DC/DC system power supply designed for Emerson DeltaV control systems. It accepts 12 VDC or 24 VDC input power and provides regulated DC outputs for system operation.

This module supports different output capacities according to the selected input voltage. It also supplies dedicated 5.1 VDC and 3.4 VDC auxiliary outputs.

The combined auxiliary output power reaches 10.2 W. This rating covers the 5.1 VDC and 3.4 VDC outputs together.

For control system engineers, the key selection factors include input voltage, output current, auxiliary power capacity, and installation restrictions. The module also requires power isolation before removal or insertion.

01 | Electrical Architecture & Power Ratings

Manufacturer	Emerson
Model / Part Number	KJ1501X1-BC3
Platform	Emerson DeltaV
Product Category	System Dual DC Power Supply
Conversion Type	DC/DC Power Supply
Input Voltage	12 VDC or 24 VDC
Input Current at 12 VDC	14.8 A
Input Current at 24 VDC	6.1 A

DC Output Configuration

Output Channel	Rated Output
Main output with 12 VDC input	12 VDC at 13 A
Main output with 24 VDC input	12 VDC at 8 A
Auxiliary output 1	5.1 VDC at 2.0 A
Auxiliary output 2	3.4 VDC at 2.0 A
Combined auxiliary power	10.2 W maximum

Important Power Design Considerations

• The input source determines the available 12 VDC output current.
• The 12 VDC input configuration supports a 13 A main output.
• The 24 VDC input configuration supports an 8 A main output.
• The 5.1 VDC and 3.4 VDC outputs share a 10.2 W combined power limit.
• Do not treat the two auxiliary output ratings as independent 10.2 W supplies.

02 | Operating Environment & Mechanical Performance

The KJ1501X1-BC3 supports industrial control cabinet environments with temperature variation, mechanical vibration, and airborne contaminants.

Ambient Temperature	-40°C to +70°C
Shock Resistance	10 g, half-sine wave, 11 ms
Vibration, Low Frequency	1 mm peak-to-peak, 2 to 13.2 Hz
Vibration, High Frequency	0.7 g, 13.2 to 150 Hz
Airborne Contaminants	ISA-S71.04-1985, Class G3
Relative Humidity	5% to 95%, non-condensing

Environmental Selection Advice: Check cabinet ventilation and ambient temperature before calculating the available power margin. High cabinet temperatures can affect the actual operating margin.

03 | Critical Installation Requirements

Installation requires careful verification of the DC source and system power state.

A. 12 VDC Passthrough Protection

• Use a suitable voltage source for 12 VDC passthrough operation.
• The source voltage must not exceed 12.6 VDC during normal operation.
• The source must supply no more than 16 A maximum.
• Verify the upstream power source before connecting the module.

B. Module Insertion and Removal

• De-energize system power before removing the power supply.
• Never insert the module while system power remains energized.
• Never remove the module while system power remains energized.
• Follow the applicable DeltaV installation procedures.
• Check connector alignment before securing the module.

Field Engineering Warning: This module does not support hot insertion or hot removal. Do not apply maintenance procedures designed for hot-swappable modules.

04 | Commissioning & Fault Diagnosis

Use a structured electrical inspection before returning the system to service.

1. Input Verification: Measure the incoming DC voltage and confirm its nominal level.
2. Current Capacity: Check whether the upstream supply supports the required input current.
3. Output Inspection: Verify the 12 VDC output and auxiliary voltage rails.
4. Load Assessment: Compare actual loads with the rated output capacities.
5. Temperature Check: Inspect cabinet temperature and ventilation conditions.
6. System Verification: Confirm normal power distribution after controlled energization.

If the output voltage remains unstable, inspect the input source and connected loads first. Avoid replacing the module before checking external wiring and load conditions.

Maintenance Characteristics

• No routine calibration is required.
• The unit contains no user-serviceable parts.
• Internal disassembly is not permitted.
• External inspection should focus on connectors and installation conditions.

05 | System Compatibility & Replacement Selection

The KJ1501X1-BC3 belongs to the Emerson DeltaV system power supply family. Verify the exact carrier and system configuration before ordering.

Use the following checklist when selecting a replacement:

• Exact Part Number: Match KJ1501X1-BC3 with the installed hardware documentation.
• Input Source: Confirm whether the cabinet supplies 12 VDC or 24 VDC.
• Output Demand: Calculate the main and auxiliary load requirements.
• Power Budget: Check the combined 10.2 W auxiliary output limit.
• Mechanical Interface: Confirm carrier mounting and connector compatibility.
• System Revision: Check the applicable hardware revision and installation documentation.

Replacement Note: Do not select another DC/DC module based only on matching voltage ratings. Different part numbers may have different output capacities, connectors, and system requirements.

06 | Compliance & Product Documentation

The product documentation references the following hazardous-atmosphere marking:

• ATEX Marking: II 3G Ex nA nC IIC Gc.
• Certificate Reference: Nemko 07ATEX3058U.
• Environmental Classification: ISA-S71.04-1985, Class G3.

Consult the applicable Emerson hazardous-area installation instructions before installation. Confirm certification applicability against the product nameplate and installation location.

07 | Package Contents

• 1 × Emerson KJ1501X1-BC3 System Dual DC Power Supply.
• Product documentation, when included with the order.

Additional accessories are not assumed. Please confirm the packing configuration with our sales team before ordering.

08 | Engineering FAQ & Purchasing Guidance

Q1: Why does the 12 VDC output current change when the input voltage changes?

The module specifies different output capacities for its two input configurations. The 12 VDC main output supports 13 A with a 12 VDC input and 8 A with a 24 VDC input. Engineers must calculate the available current using the actual input configuration.

Q2: How should engineers calculate the auxiliary power budget?

Calculate the combined load from the 5.1 VDC and 3.4 VDC rails. Their total power must remain within 10.2 W. Do not assume that each rail can independently deliver 10.2 W.

Q3: What can cause unexpected voltage drops after connecting the module?

Common causes include insufficient upstream power capacity, excessive connected loads, loose connections, and voltage drops across supply wiring. Measure the input voltage under load. Then check each output rail and compare its current demand with the rated limits.

Q4: What should buyers verify when replacing a KJ1501X1-BC3 in an operating DeltaV cabinet?

Check the installed part number, carrier interface, input voltage, output requirements, and hardware documentation. Also confirm the required shutdown procedure. This module cannot be replaced under energized system conditions.

Q5: Is the 12.6 VDC limit applicable to every input configuration?

No. This restriction specifically applies to the external voltage source used in 12 VDC passthrough mode. That source must remain at or below 12.6 VDC during normal operation. Its maximum supply capacity must not exceed 16 A. Do not apply this limit as a general specification for the 24 VDC input configuration.

Request a Quote | Emerson KJ1501X1-BC3

Need an Emerson KJ1501X1-BC3 power supply for your DeltaV system?

• Brand: Emerson
• Part Number: KJ1501X1-BC3
• Product Type: System Dual DC Power Supply
• Input: 12 VDC / 24 VDC
• Application: DeltaV industrial control systems
• Warranty: 12 months, subject to sales terms
• Pre-shipment Service: Product inspection before delivery
• Shipping Options: DHL, FedEx, UPS, and other supported carriers

Contact our team for current pricing, availability, and delivery options. Send your required quantity and installation details for a technical quotation.

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