Component Snapshot At-a-Glance
- Model: KL4201X1-BA1
- Alt. P/N: SE4601T07
- Product Series: Emerson DeltaV IS-CHARM Electronic Marshalling System
- Hardware Type: Intrinsically Safe 16-slot passive CHARM baseplate
- Key Feature: Built-in galvanic intrinsic safety barrier routing for Class I Div2 field wiring, no onboard processing chip
- Primary Field Use: Mechanically mounts up to 16 individual IS-CHARM modules, distributes bus power + field signals inside hazardous location control cabinets
Hard-Numbers: Technical Specifications
- Slot Count: 16 independent IS-CHARM plug positions per baseplate
- Protocol Support: DeltaV proprietary CHARM bus backplane communication
- CHARM Bus Supply: 6.3VDC @ max 4A total per unit
- Field Power Rating: 24VDC @ max 10A aggregated field circuit feed
- Operating Temperature: -40°C ~ +70°C ambient cabinet range
- Isolation Rating: Factory certified IS intrinsic safety per FM/ATEX, channel-side isolated for hazardous field loops
- Mount Standard: EN60715 35mm standard DIN rail locking mount
- Vibration Spec: 0.7g 13.2–150Hz | 1mm pp 2–13.2Hz, compliant ISA-S71.04 G3 environment rating
- Certifications: FM Class I Div2, ATEX II3G, IECEx, UKEX intrinsically safe approvals
- Unit Weight: ~0.5kg nominal per baseplate
The Real-World Problem It Solves
Traditional marshalling cabinets require hundreds of intermediate terminal blocks, driving excessive wiring errors and hours of rework during I/O point reconfiguration. Non-IS standard baseplates cannot route field cabling pulled directly from explosive classified process zones.
Where you’ll typically find it:
- Offshore oil rig mud processing DCS marshalling enclosures (Class I Div2 rated space)
- Petrochemical plant reactor IS control cabinets with thermocouple/RTD IS field loops
- Pharmaceutical solvent batch process classified-area I/O racks
It eliminates intermediate marshall panels and permits direct field cable termination to IS-CHARM while maintaining hazardous area intrinsic safety compliance.
Hardware Architecture & Under-the-Hood Logic
This is fully passive baseplate with zero active semiconductor components; internal precision copper traces split bus power and CHARM bus data to every slot, paired with embedded IS barrier trace routing for field wiring safety.
- Upstream CHARM power supply feeds regulated 6.3V CHARM bus into baseplate rear header terminals.
- Internal layered PCB traces split bus voltage evenly across all sixteen CHARM mounting slots.
- Separate isolated trace paths carry DeltaV digital CHARM bus communication between every slot position.
- Front-side screw terminal blocks route 24VDC field power and IS-rated field signals into dedicated isolated channel traces.
- Gold spring contacts under each slot mate with inserted IS-CHARM module to complete both bus and field signal paths.
Field Service Pitfalls: What Rookies Get Wrong
Hot-Swap Baseplate With Field Cabling Still Energized
New technicians pull the full baseplate off DIN rail while 24V hazardous field wiring remains live. Violates IS certification rules and can induce ignition-capable spark inside classified cabinets.
- Field Rule: Lock out all field + CHARM bus power before baseplate removal per site IS safety SOP; never energize field loops while baseplate slots sit empty.
Mix Standard Non-IS CHARM Into Slots
Techs install regular non-intrinsically safe CHARM modules into this IS-rated baseplate, voiding all hazardous area certification for the entire cabinet loop.
- Quick Fix: Label each baseplate rail IS ONLY at installation; stock separate part bins for IS vs standard CHARM to prevent cross-mounting.
Over-Torque Front Field Terminals Crimping Internal Traces
Excessive screwdriver torque on front field screw terminals cracks embedded PCB isolation traces, creating hidden intermittent IS leakage faults that fail annual plant safety inspection.
- Field Rule: Torque field terminals to 0.8–1.0Nm factory specified range; replace baseplate if any terminal post wobbles or pulls loose from chassis.
Commercial Availability & Pricing Note
Please note: The listed price is for reference only and is not binding. Final pricing and terms are subject to negotiation based on current market conditions and availability.
