KJ2004X1-BA1 Remote Interface Unit RIU Powergear X KJ2004X1 Series

KJ2004X1-BA1 Remote Interface Unit (RIU) – Compact Interface Module for Industrial Control Cabinets

The KJ2004X1-BA1 Remote Interface Unit (RIU) links field signals to your control system. It runs on local bus power. Also, it fits tight cabinet spaces. Moreover, it works in harsh plant areas. The unit is part of the KJ2004X1 series. Brand: Powergear X. Model: KJ2004X1-BA1.

Why This Module Stands Out

• Low power draw. The module needs only 5 VDC at 300 mA max. In addition, it uses 3.3 VDC at 500 mA max.
• Wide temperature range. It works from -40°C to +70°C. Therefore, it suits cold and hot sites alike.
• Rugged against shock and vibration. It meets 10g half sinewave for 11 msec. Besides, it meets 1 mm peak to peak from 2 to 13.2 Hz and 0.7g from 13.2 to 150 Hz.
• Built for polluted air. It meets ISA-S71.04-1985 Airborne Contaminants Class G3. Thus, dirty plant air is less of a worry.
• Safe in damp rooms. Relative humidity range is 5 to 95 percent, non-condensing. Still, the IP 20 rating only guards against fingers and dust.
• Hazardous area ready. Certifications include II 3G Ex nA nC IIC Gc, FM16ATEX0056U and FM21UKEX0017U. Meanwhile, Zone 2 installs become possible.
• No calibration. The unit needs no adjustment. Also, it has no user serviceable parts.

Technical Data

• Brand: Powergear X
• Model: KJ2004X1-BA1
• Series: KJ2004X1
• Module type: Remote Interface Unit (RIU)
• Local bus power: 5 VDC at 300 mA max
• Local bus power: 3.3 VDC at 500 mA max
• Temperature range: -40°C to +70°C ambient
• Shock: 10g half sinewave for 11 msec
• Vibration: 1 mm peak to peak from 2 to 13.2 Hz; 0.7g from 13.2 to 150 Hz
• Airborne contaminants: ISA-S71.04-1985 Class G3
• Relative humidity: 5 to 95 percent, non-condensing
• Ingress protection: IP 20
• Calibration: Not required
• Serviceable parts: None

Installation Guide

• Check the area first. Do not remove or insert the unit with system power on unless the area is known to be non-hazardous.
• Respect the power limits. Keep local bus load within 300 mA at 5 VDC and 500 mA at 3.3 VDC. Otherwise, the bus may sag.
• Keep the airflow clear. The IP 20 rating protects against fingers and dust only. However, do not expose the unit to water.
• Mind the temperature. Keep ambient air between -40°C and +70°C. Also, avoid direct heat sources.
• Do not open the case. The unit holds no user serviceable parts. Therefore, do not disassemble it for any reason.

Setup and Maintenance Convenience

• No calibration steps. You save time on commissioning. In addition, you avoid drift checks.
• No internal adjustments. Less risk of tampering. Moreover, less risk of accidental change.
• Simple swap in safe areas. Power down first. Then remove or insert the unit.
• Low heat load. Low current draw helps cabinet thermal design. Thus, cooling needs drop.

Compatibility Notes

• Bus voltage match. Use a local bus that supplies 5 VDC and 3.3 VDC within the stated limits. Otherwise, faults may appear.
• Cabinet fit. Plan for IP 20 protection. Also, add extra housing in wet or dusty zones.
• Hazardous zones. Use only where the marked Ex rating suits the site. Still, check local rules first.
• Series fit. The unit belongs to the KJ2004X1 series. Therefore, confirm slot and wiring before you order.

Where It Fits Best

• Oil and gas control cabinets in Zone 2 areas
• Petrochemical skids and remote I/O rooms
• Power plant monitoring panels
• Water treatment and pump stations
• Factory automation cells with vibration and wide temperature swings
• Marine and offshore systems with damp air

Certifications

• ATEX: II 3G Ex nA nC IIC Gc
• ATEX certificate: FM16ATEX0056U
• UKEX certificate: FM21UKEX0017U

Packing List and Warranty

• 1 x KJ2004X1-BA1 Remote Interface Unit
• 1 x Protective packing
• 1 x Quick start sheet
• Warranty: 12 months
• Dispatch: Ships in 12 to 24 hours
• Couriers: FedEx, UPS, DHL

Expert Review

The KJ2004X1-BA1 is a low power interface unit with a wide temperature span. Its G3 contaminant rating suits dirty plant air. Also, its Ex nA nC rating allows use in Zone 2. The lack of calibration keeps upkeep simple. However, buyers should check bus load and IP 20 limits first.

Manager’s Insight

Stock this module for plants that run wide temperature swings. It cuts spare part variety. Also, it needs no calibration tools. Moreover, it ships fast via FedEx, UPS or DHL. Therefore, order volume pricing at sales@powergearx.com or +86 18030005825.

FAQ

• Can I hot swap this unit?
  No. Power down first unless the area is known to be non-hazardous.
• Does it need calibration?
  No. The unit needs no calibration at any point.
• What power does it draw?
  5 VDC at 300 mA max and 3.3 VDC at 500 mA max.
• Can I use it outdoors?
  Only inside a housing. The IP 20 rating does not stop water.
• Is it safe in Zone 2?
  Yes, within the marked II 3G Ex nA nC IIC Gc rating.
• From experience, what fails first?
  Dirty air and loose bus wiring cause most faults. Therefore, keep the cabinet sealed and torque the terminals.
• How do I pick the right spares?
  Match the series, bus voltage and Ex rating. Also, keep one spare per cabinet.

Buying Guide

• Step 1: Confirm your bus supplies 5 VDC and 3.3 VDC within limits.
• Step 2: Check the site Ex zone against the ATEX and UKEX marks.
• Step 3: Review ambient temperature and vibration levels.
• Step 4: Plan IP 20 housing for wet or dusty spots.
• Step 5: Order spares with the KJ2004X1 series code. Thus, you avoid wrong-part delays.

Contact our team for stock and lead time. Email sales@powergearx.com or chat on WhatsApp at +86 18030005825.

Copyright © 2026 Powergear X Automation Limited. All rights reserved.

Original Source: https://www.powergearx.com/