Emerson 12P4628X102 CHARM Terminal Block

Product Details

12P4628X102 Product Description

The Emerson 12P4628X102 is a CHARM (Characterization Module) Terminal Block engineered for seamless integration within the DeltaV distributed control system architecture. Designed to serve as the physical and electrical interface between field wiring and the DeltaV CHARM I/O subsystem, this terminal block plays a foundational role in enabling flexible, scalable, and maintainable process automation across a wide range of industrial environments. Its system-ready design ensures drop-in compatibility with the DeltaV CIOC (CHARM I/O Card) platform, reducing commissioning time and supporting long-term operational reliability.

In modern distributed control architectures, the terminal block is far more than a passive wiring component. The 12P4628X102 is engineered to support the DeltaV Electronic Marshalling philosophy, which eliminates the need for traditional hardwired marshalling cabinets by allowing any channel to be assigned to any I/O type in software. This dramatically reduces engineering hours during project execution and simplifies future modifications, expansions, and loop reassignments without physical rewiring. The result is a leaner, more agile control cabinet footprint that supports both greenfield installations and brownfield retrofits.

Signal integrity is a critical concern in process control environments where analog 4–20 mA loops, discrete on/off signals, thermocouple inputs, and RTD measurements must be accurately transmitted to the controller. The 12P4628X102 terminal block provides robust, low-resistance electrical connections that minimize signal degradation across long field cable runs. Its design accommodates the full range of CHARM module types, ensuring that whether the application demands temperature measurement, pressure monitoring, valve control, or motor interlock logic, the terminal block delivers consistent, repeatable performance.

From a system architecture perspective, the 12P4628X102 occupies the I/O layer of the DeltaV control hierarchy, sitting between the field instrument layer and the CIOC communication layer. Above it, the DeltaV MD Plus Controller or DeltaV M-series Controller manages the control strategy execution, while below it, field devices such as pressure transmitters, flow meters, control valves, and motor starters deliver real-time process data. The CHARM terminal block ensures that this data pathway remains electrically sound, mechanically stable, and easily serviceable throughout the lifecycle of the plant.

The 12P4628X102 CHARM Terminal Block achieves its full value when deployed as part of a cohesive DeltaV automation platform. In a typical DeltaV Electronic Marshalling cabinet, the terminal block is mounted on a CHARM carrier alongside individual CHARM modules — such as the Emerson KJ3221X1-BA1 AI CHARM for analog input, the Emerson KJ3222X1-BA1 AO CHARM for analog output, and the Emerson KJ3223X1-BA1 DI CHARM for discrete input — each characterizing a single I/O channel independently. This per-channel flexibility is the cornerstone of the Electronic Marshalling concept.

The CHARM carrier assembly connects to the DeltaV CIOC (CHARM I/O Card), which aggregates up to 96 CHARM channels and communicates with the DeltaV controller over the DeltaV I/O bus. The controller tier — typically a DeltaV MD Plus Controller or DeltaV M5Plus Controller — executes the control modules and communicates with the DeltaV workstation network via Ethernet. For high-availability applications, the DeltaV Redundant Controller pair ensures bumpless transfer in the event of a primary controller fault, maintaining continuous process operation.

Power distribution within the DeltaV cabinet is managed by the DeltaV Power Supply (PS2) or equivalent redundant power supply modules, which provide stable 24 VDC to the CIOC and CHARM carrier assemblies. Upstream, the DeltaV Workstation running DeltaV Operate provides the HMI layer, enabling operators to monitor loop status, acknowledge alarms, and execute manual overrides in real time. For remote I/O applications or geographically distributed field junction boxes, the DeltaV RROC (Remote I/O Card) extends the I/O architecture over fiber or copper Ethernet links, maintaining the same CHARM-based flexibility at remote marshalling locations.

In safety-instrumented system (SIS) applications, the DeltaV SIS platform — including the DeltaV SIS Logic Solver and associated SIS I/O modules — can be integrated within the same engineering environment, allowing unified configuration, diagnostics, and alarm management across both basic process control and safety layers. This architectural convergence reduces engineering complexity and supports IEC 61511 compliance for process safety applications in oil and gas, chemical, and power generation facilities.

For communication-intensive architectures, the DeltaV FOUNDATION Fieldbus H1 Card or DeltaV HART Multiplexer can be added to the same DeltaV system to support legacy HART field devices or FOUNDATION Fieldbus segments, enabling device diagnostics, valve signature analysis, and predictive maintenance data collection without additional engineering infrastructure. The 12P4628X102 terminal block, as the physical anchor of each CHARM channel, ensures that all these system layers remain electrically interconnected with the reliability and repeatability that continuous process operations demand.

Oil, Gas & Petrochemical: In upstream and downstream hydrocarbon processing facilities, the 12P4628X102 supports the DeltaV Electronic Marshalling architecture in wellhead control panels, compressor control systems, and refinery distillation unit automation. The ability to reassign I/O channels in software without rewiring is particularly valuable during process modifications and capacity expansions, where minimizing shutdown time is critical to production economics.

Power Generation & Utilities: Combined-cycle power plants, cogeneration facilities, and utility substations rely on DeltaV-based control systems for boiler management, turbine control, and balance-of-plant automation. The 12P4628X102 terminal block provides the reliable field wiring interface needed to maintain continuous monitoring of temperature, pressure, flow, and vibration signals across hundreds of I/O points, supporting both normal operations and emergency shutdown sequences.

Water & Wastewater Treatment: Municipal water treatment plants and industrial effluent systems use DeltaV to automate chemical dosing, filtration, and pump sequencing. The CHARM terminal block's modular design simplifies the addition of new measurement points as treatment capacity expands, while its robust construction withstands the humid, corrosive environments typical of water treatment facilities.

Pharmaceutical & Life Sciences: FDA-regulated manufacturing environments demand rigorous change control and audit trail documentation. The DeltaV Electronic Marshalling system, anchored by components like the 12P4628X102, supports 21 CFR Part 11 compliance by enabling software-based I/O reassignment with full electronic records, reducing the risk of documentation errors associated with physical rewiring during process validation activities.

Mining, Metals & Minerals Processing: Ore processing plants, smelters, and mineral separation facilities operate in harsh environments with high vibration, dust, and temperature extremes. The 12P4628X102's industrial-grade construction ensures reliable signal transmission from field instruments monitoring crusher loads, conveyor speeds, flotation cell levels, and furnace temperatures, supporting continuous production with minimal unplanned downtime.

Q1: Is the Emerson 12P4628X102 compatible with all DeltaV CHARM module types? The 12P4628X102 CHARM Terminal Block is designed for use within the DeltaV Electronic Marshalling system and is compatible with the full range of DeltaV CHARM modules, including AI, AO, DI, DO, thermocouple, and RTD CHARM types. Each CHARM module plugs into the terminal block carrier, characterizing the individual I/O channel. Compatibility should always be verified against the specific DeltaV system revision and CIOC firmware version in use. NANKMOS provides pre-shipment functional verification and can assist with compatibility confirmation prior to order placement.

Q2: Can the 12P4628X102 be used in a redundant DeltaV I/O architecture? Yes. The DeltaV CHARM I/O system supports redundant CIOC configurations, where two CIOC cards share a common set of CHARM carriers and terminal blocks. In this configuration, the 12P4628X102 terminal block serves both the primary and secondary CIOC, enabling bumpless I/O failover without field wiring changes. This redundancy architecture is recommended for critical process loops where I/O card failure would result in unacceptable process disruption or safety risk. Consult the DeltaV Electronic Marshalling hardware manual for specific redundancy wiring requirements.

Q3: What warranty and post-sale support does NANKMOS provide for the 12P4628X102? NANKMOS provides a 12-Month Warranty on the Emerson 12P4628X102 CHARM Terminal Block, covering manufacturing defects and functional failures under normal operating conditions. All units undergo pre-shipment inspection and functional testing before dispatch. In the event of a warranty claim, NANKMOS offers rapid replacement to minimize control system downtime. Our technical team is available to assist with installation guidance, compatibility verification, and system integration support. Contact us at [email protected] or +86 18359268345 for pre-sales consultation and post-sale technical assistance.