Product Short Description
Product Name: Ovation 8-channel HART analog output module
Product Introduction: A rack-mounted DCS output module that converts Ovation controller digital values into eight isolated 4–20 mA analog outputs while superimposing HART digital communication on the same loop for smart field-device configuration and diagnostics.
Description
Technical Specifications:
- Channels: 8 independent, galvanically isolated (1000 VDC channel-to-logic)
- Output: 4–20 mA default (also 0–20 mA / 0–10 V configurable), max load 700 Ω at 24 VDC aux
- Resolution: 14-bit D/A, accuracy ±0.25 % span (0.1 % FS typical)
- Update rate: 24 ms per channel
- HART: Embedded HART 5/6/7, FSK modulated on analog loop
- Isolation: 1000 VAC/VDC channel-to-logic, no channel-to-channel isolation
- Power: Backplane 24 VDC (~1.2 W typ.), auxiliary 24 VDC for loop (~6 W typ.)
- Diagnostics: Open-loop detection, 8 pass/fail status bits, EEPROM ID storage
- Operating temp: 0–60 °C, 0–95 % RH non-condensing
- Mounting: Ovation I/O rack slot, hot-swappable
- Dimensions: ~160 × 100 × 60 mm, weight ~0.9 kg
Functional Features: Simultaneous analog control and HART bidirectionaldigital talk, per-channel open-circuit fault reporting, AMS Device Manager compatible, software timeout configuration, optical isolation from field noise.
Application Scenarios: Power plant turbine/boiler valve control, oil and gas pipeline actuators, refinery reactor feed valves, water treatment dosing pumps, remote HART instrument calibration.
Working Principle: A 16 MHz microcontroller receives controller commands over the Ovation bus, performs D/A conversion per channel, drives a 4–20 mA current sink/source into the field instrument, and overlays HART FSK tones through a coupling switch so the same two wires carry both control current and device digital data.
Installation Requirements: Insert into designated Ovation output rack position, terminate loop wiring to channel screw terminals, supply auxiliary 24 VDC to common rail, verify bus address via rack configuration.
Usage Notes: Do not exceed 700 Ω total loop resistance; HART multidrop requires correct master address; remove module only with rack powered if hot-swap supported; confirm firmware revision matches Ovation drop.
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