KJ4001X1-BE1 8 Wide I/O Carrier with Shield Bar: Specifications
The KJ4001X1-BE1 (document part number 12P0818X072) is an 8-wide I/O carrier with a shield bar,
engineered for hazardous and industrial environments. Below are the key specifications extracted
from the document:
Power Specifications
LocalBus Circuit: 12.6 VDC at 8 A
Field Circuit Power: 30 VDC at 6.5 A
Field Power Constraint: Bussed field power must not exceed 30 VDC (no connection to supplies with
higher potential).
Environmental Specifications
Ambient Temperature: -40 to 70 °C
Shock Resistance: 10g ½ Sinewave for 11 msec
Vibration Resistance: 1mm Peak to Peak (5–16 Hz); 0.5g (16–150 Hz)
Airborne Contaminants: Compliant with ISA-S71.04 –1985 Class G3
Relative Humidity: 5 to 95% non-condensing
Protection Class: IP20 (per IEC 60529)
Safety & Hazardous Location Approvals
ATEX Certification: II 3 G, EEx nA IIC T4 (Nemko No. 02ATEX431U)
FM Approval: Class I, Division 2, Groups A,B,C,D Hazardous Locations; Temperature Rating T4
Installation & Operational Constraints
Hot-Swappable: No – Cannot be removed/inserted with system power energized; field power
(terminal or bussed) must be disconnected before handling.
Power De-Energization Requirement: Power must be turned off before disconnecting carriers or
LocalBus Extender cables.
Unoccupied Location Requirement: A module cover (KJ4001X1-FA1) must be fitted to permanently
unoccupied positions on the carrier.
Cable & Length Limits: Total length of I/O carriers + LocalBus Extenders must not exceed 6.5 meters;
interconnecting cables between enclosures must be in conduit.
Safe Unplugging: Can only be unplugged if the system is de-energized or the area is confirmed safe.
Maintenance & Identification
User-Serviceable Parts: None – Disassembly is prohibited; calibration is not required.
Product Label: Contains serial number, manufacturing location, and manufacturing date for tracking
and compliance.
Overview of Emerson KJ4001X1-BE1 8 Wide I/O Carrier with Shield Bar
The Emerson KJ4001X1-BE1 (document part number 12P0818X072) is an 8-wide I/O carrier with an
integrated shield bar, purpose-built for reliable integration in industrial and hazardous environments.
As a critical component of Emerson’s automation ecosystems (such as the DeltaV™ Scalable Process
System), it serves as a centralized hub for mounting I/O modules and managing power distribution to
field devices, making it ideal for sectors like oil and gas, chemical processing, and power generation
where safety and durability are paramount.
Designed to balance high power capacity with strict safety compliance, the carrier operates on two
key power circuits: a 12.6 VDC LocalBus circuit (8 A) for internal system communication and a 30 VDC
field circuit (6.5 A) to power connected field devices—with a strict constraint that bussed field power
never exceeds 30 VDC to prevent equipment damage. Its environmental resilience ensures
performance in harsh conditions: it tolerates ambient temperatures from -40 to 70 °C, 10g shock (11
msec ½ sinewave), and vibration (1mm peak-to-peak at 5–16 Hz; 0.5g at 16–150 Hz), while adhering
to ISA-S71.04 Class G3 for airborne contaminants and 5–95% non-condensing humidity (IP20
protection class for dust resistance).
Safety is a core design focus, with global hazardous location certifications to validate its use in
explosive atmospheres: ATEX approval (II 3 G, EEx nA IIC T4, Nemko No. 02ATEX431U) and FM
approval (Class I, Division 2, Groups A–D, T4 temperature rating). However, it requires strict adherence
to installation and handling rules—for example, it cannot be removed or inserted with system power
energized, field power (terminal or bussed) must be disconnected before handling, and power must
be de-energized when disconnecting carriers or LocalBus Extender cables. Additional safeguards
include mandatory module covers (KJ4001X1-FA1) for permanently unoccupied carrier positions, a
6.5-meter total length limit for carriers + LocalBus Extenders, and a requirement for interconnecting
cables between enclosures to be in conduit.
From a maintenance perspective, the carrier is engineered for minimal upkeep: it contains no user-
serviceable parts (disassembly is forbidden) and requires no calibration, reducing operational
downtime. Practical details like a product label (with serial number, manufacturing location, and date)
simplify tracking, warranty claims, and compliance documentation.
Overall, the KJ4001X1-BE1 combines robust power management, environmental durability, and
rigorous safety compliance, making it a trusted foundational component for industrial automation
systems operating in demanding and hazardous conditions.
