Yokogawa DP97*B Display Processor Card

Product Details

DP97*B Product Description

The Yokogawa DP97*B is a high-performance Display Processor Card engineered for seamless integration within the CENTUM distributed control system (DCS) architecture. Designed to bridge field-level instrumentation with upper-layer control and monitoring platforms, the DP97*B serves as a critical data link node in smart factory environments — enabling real-time signal acquisition, protocol-transparent communication, and continuous process visibility across multi-tier industrial networks.

In modern industrial automation sites, the demand for uninterrupted data flow between field devices and supervisory systems has never been greater. The DP97*B addresses this need by functioning as a network-linked display processor that connects EJA-series differential pressure transmitters, temperature sensors, and flow measurement devices to CENTUM VP or CENTUM CS 3000 controllers. Its embedded communication logic supports HART protocol over 4–20 mA loops, enabling bidirectional digital communication without disrupting the analog signal path — a fundamental requirement for hybrid automation architectures transitioning toward full digital integration.

The DP97*B operates at the intersection of field instrumentation and plant-wide data infrastructure. In a typical smart factory deployment, EJA110E differential pressure transmitters and EJA530A absolute pressure transmitters feed live process variables — flow rate, pressure differential, and level — into the DP97*B via HART-enabled 4–20 mA loops. The display processor card decodes these HART frames, extracts primary and secondary process variables, and forwards structured data packets upstream through the CENTUM I/O bus to the CENTUM VP Field Control Station (FCS).

From the FCS, data is routed through the Vnet/IP control network — Yokogawa's proprietary high-speed Ethernet-based control bus — to the CENTUM VP Human Interface Station (HIS), where operators interact with real-time process graphics, trend displays, and alarm management panels. Simultaneously, the CENTUM VP Engineering Workstation (EWS) receives configuration and diagnostic data from the DP97*B, enabling remote parameter adjustment and loop calibration without physical access to the field junction box.

For sites requiring integration with third-party SCADA platforms such as Wonderware System Platform or Ignition SCADA, the CENTUM VP OPC-DA/UA server acts as a protocol bridge, translating CENTUM-native data structures into OPC-compliant tags accessible by any standards-based HMI or historian. The DP97*B's HART diagnostic data — including device status, loop current, and sensor degradation indicators — is surfaced through this OPC layer, enabling predictive maintenance workflows driven by real-time field intelligence.

In multi-drop RS-485 segments, the DP97*B can interface with Yokogawa YS1700 programmable indicating controllers and Yokogawa UM33A digital indicators, consolidating local display logic with centralized DCS supervision. Edge gateway devices such as the Yokogawa OpreX Field Device Advisor further extend the diagnostic reach of the DP97*B by aggregating HART device health data and transmitting it to cloud-based asset management platforms via MQTT or REST API — completing the data chain from sensor to enterprise dashboard.

Power supply stability for the DP97*B and its associated I/O modules is maintained by dedicated 24 VDC DIN-rail power supplies with redundant feed capability, ensuring that communication integrity is preserved even during partial power events. Industrial managed Ethernet switches with PROFINET-aware VLAN segmentation isolate the CENTUM control network from the plant IT backbone, preventing latency spikes caused by enterprise traffic from affecting real-time loop control.

Many industrial facilities operate with fragmented automation layers — legacy PLCs running proprietary protocols, standalone HMI panels with no historian connectivity, and field transmitters that have never been interrogated beyond their primary 4–20 mA output. The DP97*B directly addresses these data gaps by unlocking the full HART communication capability of EJA-series transmitters already installed in the field, without requiring instrument replacement or loop rewiring.

Protocol inconsistency is one of the most persistent barriers to plant-wide transparency. Sites that mix Modbus RTU devices, HART instruments, and CENTUM-native I/O modules often struggle to present unified process data in a single SCADA view. The DP97*B, operating within the CENTUM DCS framework, normalizes these data streams at the controller level — ensuring that every process variable, regardless of its originating protocol, is available as a consistent engineering-unit tag within the CENTUM VP historian and alarm management system.

Remote monitoring and diagnostics are increasingly mandated by plant safety and reliability standards. The DP97*B enables remote loop diagnostics through HART pass-through commands issued from the CENTUM EWS, allowing instrument engineers to check sensor drift, verify loop integrity, and acknowledge device alerts without dispatching field technicians — reducing mean time to repair (MTTR) and minimizing unplanned downtime. Alarm tracking is enhanced by the DP97*B's ability to relay HART device status bits as discrete DCS alarms, providing operators with early warning of sensor degradation before process deviation occurs.

System expansion is straightforward: additional DP97*B cards can be installed in CENTUM I/O nest slots without controller reconfiguration, supporting phased capacity growth as new measurement points are added to the process. Each unit ships pre-tested and verified against CENTUM compatibility matrices, with full factory acceptance test (FAT) documentation available upon request.

Q1: What communication protocols does the Yokogawa DP97*B support? The DP97*B supports HART protocol over standard 4–20 mA loops and communicates with the CENTUM DCS via the proprietary CENTUM I/O bus. When integrated with the CENTUM VP OPC server, process data is accessible via OPC-DA and OPC-UA to any compatible SCADA or historian platform. RS-485 Modbus RTU connectivity is available through CENTUM serial I/O modules paired in the same nest.

Q2: How does the DP97*B ensure network stability in high-noise industrial environments? The DP97*B is designed to operate within the electrically noisy conditions typical of process plants, with HART signal filtering and loop isolation built into the card's analog front end. The CENTUM Vnet/IP control network provides deterministic, low-latency data transport with redundant ring topology support, ensuring that display processor data reaches the HIS and historian without packet loss or communication timeout — even in environments with heavy VFD switching noise or ground loop interference.

Q3: Can the DP97*B be used for remote diagnostics and predictive maintenance? Yes. The DP97*B relays full HART device diagnostic data — including sensor temperature, loop current, device status flags, and configuration parameters — to the CENTUM EWS via HART pass-through. This data can be forwarded to the Yokogawa OpreX Asset Management platform or third-party CMMS systems via OPC-UA, enabling condition-based maintenance scheduling and early fault detection without physical field access.

Q4: What warranty and stock availability does NANKMOS offer for the DP97*B? All Yokogawa DP97*B units supplied by NANKMOS carry a 12-Month Warranty covering manufacturing defects and functional performance. Each unit undergoes pre-shipment functional testing and is shipped with inspection documentation. Stock is maintained for immediate dispatch; lead time for in-stock units is typically 3–7 business days depending on destination. For volume orders or urgent requirements, contact [email protected] or call +86 18359268345.