Description
‑ Power Supply：Power supplied by rack back‑plane, 5VDC logic power supply
‑ Mechanical Structure：Rack plug‑in module for Symphony Plus rack；overall weight approx 0.56kg
‑ On‑board Resources：D/A conversion circuit, signal drive conditioning circuit, channel short‑circuit detection circuit, hardware self‑diagnosis circuit, onboard calibration parameter storage
‑ Communication Interface：Internal rack back‑plane module bus for communicating with station processor.
‑ Galvanic Isolation：Group‑to‑system galvanic isolation, isolation voltage 1500VRMS, restrain interference fed back from field actuators into DCS system.
‑ Core Function：Receive digital control set‑point from processor, D/A conversion, output 4‑20mA /1‑5V analog signal for field regulating equipment, channel short‑circuit fault diagnosis, status information upload to station processor.
‑ Protection：Per‑channel output short‑circuit protection, over‑voltage reverse‑connection protection.
‑ Status LED Indicators：Power LED, fault LED, module status LED.
‑ Weight：approx 0.56kg
‑ SPASO11 is 14‑channel analog output module for Symphony Plus DCS. Each channel supports 4‑20mA current output or 1‑5V voltage output, channel parameters can be independently configured according to field actuator type。
‑ Convert digital control value issued by main processor into stable analog output signal, drive regulating valve, electric positioner and other field control equipment. Support output hold function, when communication abnormal, keep last output value to avoid field equipment mis‑operation.
‑ Built‑in comprehensive self‑diagnosis function: detect module hardware failure, output channel short‑circuit, load abnormal; fault alarm information upload to DCS operator station. Output accuracy reaches ±0.1% full scale.
‑ Installed on Symphony Plus standard rack, cannot work independently, must cooperate with station processor and matched terminal wiring unit to connect field actuators.
Difference compared with SPASI23：SPASI23 is 16‑channel universal analog input module for collecting field sensor signals; SPASO11 is analog output module for issuing control signals to field actuators.
‑ Receive digital control point data from station processor, complete D/A conversion and output standard analog signal to field actuators.
‑ Monitor module hardware health status and each output channel load status, short‑circuit and fault information upload to DCS system.
‑ No independent process control logic function, all control algorithm executed by upper‑level station processor.
‑ Back‑plane：Rack internal back‑plane module bus for data communication and module power supply.
‑ External interfaces：Connect field regulating actuators through supporting terminal wiring unit.
‑ Mounting：Plug‑in installation on Symphony Plus standard rack
‑ Operating Temperature：0 ℃ ~ +70 ℃
‑ Storage Temperature：‑40 ℃ ~ +85 ℃
‑ Relative Humidity：5‑95 %RH, non‑condensing
‑ Pollution degree：Degree 2
‑ Protection Class：IP20, cabinet‑internal installation.
- SPASO11 smart process analog output slave module（6643934X1）
Complementary parts: Symphony Plus rack, station processor, matched analog output terminal unit, field regulating valve / positioner actuators, shielded signal cable, system network, operator station.
‑ Insert module into correct I/O slot of Symphony Plus rack, tighten front‑panel locking knobs to guarantee reliable back‑plane connector contact.
‑ Field output signal wiring adopt shielded cable, separate layout from high‑voltage power cable to reduce electromagnetic interference. Channel signal type must match field actuator specification.
‑ Module replacement recommends power‑off operation. After replacement, download corresponding configuration, verify each channel output value changes synchronously with DCS control set‑point.
‑ Pay attention to field loop load resistance range, excessive load resistance will cause output abnormal.
Power plant, petrochemical, pulp‑and‑paper industry Symphony Plus DCS control cabinets; analog control output spare‑part, drive flow, pressure, temperature regulating valves and field positioners.
- ABB Symphony Plus SPASO11 smart process analog output slave module (6643934X1), high‑density 14‑channel AO module for Symphony Plus DCS。
- Support 4‑20mA current, 1‑5V voltage output, output hold function under communication failure, high output accuracy ±0.1%FS.
- Group‑channel galvanic isolation, per‑channel short‑circuit and reverse‑voltage protection, abundant hardware and channel fault self‑diagnosis, alarm upload function.
- Rack plug‑in structure, cabinet‑internal IP20 application, cooperate with special terminal unit for field actuator wiring.
- Only undertake D/A conversion and control signal output, no independent control logic, control strategy runs in station processor. Distinguished from SPASI23 analog‑input module.
- Discontinued legacy DCS spare‑part, used for old‑system maintenance and retrofit projects。
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