Description
Core Product Summary (Brand / Model / Key Attributes)
The Emerson DA7281440 is the P144.R4 Intelligent I/O Board for the FloBoss S600 and S600+ panel-mount flow computers. It serves as the primary process-signal interface module, converting field analogue, digital, pulse, frequency, and temperature inputs into engineering units used by the flow computer CPU for fiscal and custody-transfer calculations.
This module provides 12 analogue inputs (ten jumper-configurable for 0–5.25 V or 0–22 mA, two current-only), four fully floating analogue outputs, 16 optically isolated digital inputs, 12 digital outputs, three frequency/density inputs, three PRT/RTD inputs, and pulse I/O capability (enhanced by the optional P148 mezzanine). Field connections are made through three low-density D-type connectors (SKT-A, SKT-B, SKT-C) on the module backplate. It occupies a dedicated slot in the S600/S600+ chassis and is the standard I/O complement supplied with the flow computer.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product type | Intelligent I/O module (P144.R4) |
| System compatibility | FloBoss S600 / S600+ Flow Manager |
| Analogue inputs | 12 (ANIN 1–10: 0–5.25 V or 0–22 mA selectable; ANIN 11–12 current-only) |
| Analogue input resolution | 24-bit, auto-zero, auto-calibrate |
| Analogue outputs | 4 fully floating, up to 650 Ω load |
| Digital inputs | 16 optically isolated |
| Digital outputs | 12 |
| Pulse inputs | 4 (enhanced by optional P148 mezzanine) |
| Pulse outputs | 5 |
| Frequency / density inputs | 3 |
| PRT / RTD inputs | 3 |
| Field connectors | Three low-density D-type (SKT-A, SKT-B, SKT-C) |
| Optional accessory | P148 Pulse Mezzanine daughterboard |
Detailed Product Overview
The Emerson DA7281440 (P144.R4) functions as the core process-interface board inside the FloBoss S600 and S600+ panel-mount flow computers. These systems are designed for fiscal measurement, custody transfer, pipeline metering, batch loading, and meter proving of hydrocarbon liquids and gases. The board continuously acquires field signals, performs local conversion and integrity checks, and supplies the engineering-unit values required by the main processor for multi-stream flow calculations.
Twelve analogue input channels are provided. Channels 1–10 are individually configurable via on-board jumpers for either voltage (0–5.25 V) or current (0–22 mA) operation; channels 11 and 12 accept current only. Two fully floating A/D converters handle the conversion, delivering 24-bit resolution with auto-zero and auto-calibration. Scan rates allow all channels to be acquired in less than one second, with conversion times under 100 ms per channel. Four independent, fully floating analogue outputs drive loads up to 650 Ω and may be configured for source or sink operation.
Digital I/O comprises 16 optically isolated inputs arranged in banks of four with shared commons, and 12 digital outputs. Pulse handling is native to the board and is extended by the optional P148 mezzanine card, which supports dual-pulse or single-pulse turbine/meter inputs typically in the 1 Hz–10 kHz range. Three frequency inputs are available for densitometer signals, and three four-wire PRT/RTD channels support temperature measurement.
All field wiring terminates on three low-density D-type connectors (SKT-A, SKT-B, SKT-C) mounted on the module backplate. The board occupies one of the three available expansion slots in the S600/S600+ chassis; the standard factory configuration includes one P144 with a P148 mezzanine already fitted. Additional P144 modules may be installed for higher I/O density, while the remaining slots can accept P154 prover or P188 HART modules.
Because the P144 performs local signal conditioning and continuous background integrity checks, it reduces the computational load on the main CPU and supports the high-integrity requirements of fiscal metering. Correct jumper settings for voltage/current mode and proper connection of the D-type field connectors are essential for accurate operation.
DA7281440
DA7281440
System Compatibility & Integration Requirements
| Item / Dependency | Verified Compatibility or Requirement | Practical Note |
|---|---|---|
| Host system | FloBoss S600 / S600+ Flow Manager | Occupies first expansion slot |
| Field connectors | SKT-A, SKT-B, SKT-C low-density D-type | Required for all field I/O wiring |
| Pulse enhancement | Optional P148 mezzanine daughterboard | Factory-fitted on standard units; supports dual-pulse |
| Additional modules | Up to two further P144, P154 (prover) or P188 (HART) modules | Total of three expansion slots available |
| Configuration software | Config600 (Lite / Lite+ / Pro) | Used to assign I/O points to streams and stations |
| Power | System 20–32 V DC supply | Supplied via chassis backplane |
Dimensions, Mounting & Connection Notes
The DA7281440 is a plug-in printed-circuit module that installs in one of the three expansion slots of the FloBoss S600 / S600+ chassis. Field wiring is terminated exclusively on the three low-density D-type connectors (SKT-A, SKT-B, SKT-C) located on the module backplate. Analogue input voltage/current selection is performed by on-board jumpers; these must be set correctly before power-up. The optional P148 pulse mezzanine mounts as a daughterboard directly on the P144. No external terminal blocks or intermediate adapters are required for standard installations.
Engineering Selection Highlights
- Confirmed fit for FloBoss S600 and S600+ chassis — the P144 occupies the first expansion slot and is the standard I/O complement supplied with the flow computer.
- 12 analogue inputs with independent voltage/current selection on channels 1–10 provide flexible interfacing to pressure, differential-pressure, and other transmitters without external signal conditioners.
- Fully floating analogue outputs (650 Ω load capability) allow direct connection to control valves or remote indicators without additional isolation.
- Optional P148 mezzanine adds dual-pulse security and turbine-meter inputs required for many liquid and gas metering applications.
- Three D-type field connectors (SKT-A/B/C) define the exact wiring interface; mismatched cabling will prevent correct signal acquisition.
- Native support for three PRT/RTD and three densitometer frequency inputs reduces the need for additional temperature or density transmitters in multi-stream configurations.
- Module-level integrity checking and local conversion support the high-accuracy, multi-stream fiscal calculations performed by the S600/S600+ CPU.
FAQ
What is the Emerson DA7281440?
It is the P144.R4 Intelligent I/O Board used in the FloBoss S600 and S600+ panel-mount flow computers for acquiring process signals.
Which system does the DA7281440 belong to?
It is designed exclusively for the Emerson FloBoss S600 and S600+ Flow Manager platforms.
What I/O does the board provide?
12 analogue inputs, 4 analogue outputs, 16 digital inputs, 12 digital outputs, pulse I/O (with optional P148), 3 frequency/density inputs, and 3 PRT/RTD inputs.
How are field devices connected?
All field wiring terminates on three low-density D-type connectors labelled SKT-A, SKT-B and SKT-C on the module backplate.
Is a pulse mezzanine required?
The optional P148 mezzanine is required for dual-pulse turbine or high-integrity pulse inputs; many standard units ship with it already installed.
Can additional I/O capacity be added?
Yes. The S600/S600+ chassis accepts up to two further expansion modules (additional P144, P154 prover, or P188 HART boards).
What configuration tool is used?
I/O points are assigned and scaled using Emerson Config600 software.
Verification & Troubleshooting Notes
Confirm the module is fully seated in the correct chassis slot and that the three D-type field connectors are properly mated. Verify analogue-input jumpers match the connected signal type (voltage or current). On power-up, observe the module status indicators and any I/O-related messages reported on the S600 front-panel display or via the web server. Incorrect jumper settings or open field connections will produce circuit-fail or integrity alarms that can be diagnosed through the Config600 interface or the flow computer’s diagnostic pages. Do not apply external test voltages that exceed the design ratings of the input circuits.
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