FISHER DPR910X1-A2 – Integral Process Controller | DPR910 Platform
Engineering Background: The Fisher DPR910 series represents Fisher Controls’ (an Emerson brand) dedicated single-loop process controller platform, engineered for demanding continuous process environments where precision, reliability, and loop stability are non-negotiable. The DPR910 platform was widely deployed across oil & gas, chemical processing, and power generation facilities throughout the 1990s–2010s, and remains operational in thousands of installed base sites globally.
Product Positioning: The DPR910X1-A2 is the Integral Controller module within the DPR910 architecture — the computational core responsible for executing PID control algorithms, managing setpoint logic, and interfacing with field transmitters and final control elements. This module is a critical spare and direct replacement component for facilities maintaining DPR910-based control loops without full DCS migration.
Complete Technical Specifications
- Part Number: DPR910X1-A2
- Series / Platform: DPR910
- Module Type: Integral Controller
- Manufacturer: Fisher Controls (Emerson Electric)
- Control Algorithm: PID (Proportional-Integral-Derivative)
- Input Signal: 4–20 mA analog process variable
- Output Signal: 4–20 mA control output to final element
- Setpoint Interface: Local and remote setpoint capability
- Power Supply: 24 VDC nominal (loop-powered / panel-powered, verify with system documentation)
- Operating Temperature: 0°C to +60°C (32°F to 140°F)
- Enclosure / Form Factor: DIN-rail / panel-mount module
- Weight: 820 g (as shipped)
- Communication: Hardwired analog I/O; no fieldbus (HART/FOUNDATION Fieldbus not applicable to base model)
- Compliance: CE Marking; UL/CSA listed (verify specific suffix)
Proven Application Environments
- Oil & Gas Upstream/Midstream: Wellhead pressure control, separator level control, gas flow regulation — where single-loop standalone controllers reduce DCS load and provide local fallback.
- Chemical & Petrochemical Plants: Reactor temperature loops, distillation column reflux ratio control, feed-forward compensation loops requiring dedicated integral action.
- Power Generation: Boiler feedwater control, steam pressure regulation, turbine bypass valve positioning.
- Water & Wastewater Treatment: Dosing pump control, pH neutralization loops, flow-paced chlorination systems.
- Pulp & Paper: Digester pressure control, stock consistency loops, headbox pressure regulation.
- Installed Base Maintenance: Direct drop-in replacement for aging DPR910 systems avoiding costly full-loop re-engineering.
Engineering Advantages
- Proven Loop Stability: Fisher’s DPR910 integral algorithm is tuned for industrial process dynamics — minimal overshoot, fast disturbance rejection.
- Standalone Reliability: No dependency on DCS network health; continues control during upstream communication faults.
- Direct Replacement: Pin-compatible and functionally equivalent to original factory specification — zero re-engineering required for installed base.
- Emerson Ecosystem Compatible: Integrates with Fisher valve positioners, Rosemount transmitters, and DeltaV supervisory systems.
- Reduced Downtime Risk: Stocking this module as a critical spare eliminates multi-week lead times during unplanned failures.
System Architecture & Signal Flow
In a typical DPR910 control loop, the DPR910X1-A2 Integral Controller sits at the center of the signal chain:
Field Transmitter (4–20 mA PV) → DPR910X1-A2 Integral Controller → Control Output (4–20 mA) → I/P Transducer / Valve Positioner → Control Valve
The module computes the error between setpoint and process variable, applies PID integral action to eliminate steady-state offset, and drives the output signal to the final control element. Local operator interface allows manual/auto mode switching and setpoint adjustment without DCS intervention.
Sourcing & Quality Verification
- Source: Konmask.com sources DPR910X1-A2 units from decommissioned plant inventories, authorized distributors, and verified industrial surplus channels.
- Inspection Protocol: Each unit undergoes visual inspection, connector integrity check, and functional bench verification prior to listing.
- Condition: Tested used / refurbished unless explicitly stated as new-in-box (NIB). Condition confirmed in order documentation.
- Traceability: Serial number and manufacturing date code recorded and provided with shipment documentation upon request.
- Warranty: 90-day functional warranty against DOA. Extended warranty available — contact sales.
Procurement Process
- Verify Part Number: Confirm DPR910X1-A2 against your existing module label or system BOM before ordering.
- Request Quote: Contact support@konmask.com for volume pricing, lead time, and export documentation (CO, packing list, commercial invoice).
- Order & Payment: T/T bank transfer, PayPal, or credit card accepted. Pro-forma invoice issued within 24 hours.
- Shipping: DHL / FedEx Express worldwide. Typical dispatch within 1–3 business days of payment confirmation.
- Customs & HS Code: HS 8537.10 (Boards, panels, consoles for electric control). Export documentation prepared per destination country requirements.
Technical FAQ
Q: Is DPR910X1-A2 compatible with DPR910X1-A1?
A: The A2 suffix denotes a hardware revision. Functional compatibility is generally maintained, but verify firmware version and jumper configuration with your system documentation before hot-swapping.
Q: Can this controller operate in manual mode independently?
A: Yes. The DPR910 platform supports local manual/auto switching via front-panel interface, allowing operator override without DCS command.
Q: What is the typical failure mode of this module?
A: Most field failures involve output circuit degradation (drift in 4–20 mA output) or power supply rail issues. Input circuit failures are less common. Konmask bench-tests output linearity prior to shipment.
Q: Do you provide calibration certificates?
A: Functional test reports are available. NIST-traceable calibration certificates can be arranged at additional cost — specify at time of order.
Q: What is the lead time if not in stock?
A: Typical sourcing lead time is 2–4 weeks for this model. Contact us to confirm current availability.
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