Description
‑ Power Supply：Power supplied by rack back‑plane 5VDC logic power supply
‑ Mechanical Structure：Rack plug‑in module for Symphony Plus HR rack；overall weight approx 0.57kg
‑ On‑board Resources：Output drive circuit, open‑collector power switch component, channel short‑circuit detection circuit, hardware self‑diagnosis circuit, fault status latch circuit
‑ Communication Interface：Internal rack back‑plane Expander module bus for communicating with station controller.
‑ Galvanic Isolation：Group‑to‑system galvanic isolation, isolation voltage 1500VRMS, restrain interference fed back from field load into DCS control system.
‑ Core Function：Receive digital switching command from controller, open‑collector digital output driving, channel short‑circuit fault diagnosis, output fail‑safe state control, upload channel status information to station controller.
‑ Protection：Per‑channel output short‑circuit protection, over‑current limiting, surge suppression protection.
‑ Status LED Indicators：Power LED, fault LED, module status LED.
‑ Weight：approx 0.57kg
‑ SPDSO14 is 16‑channel open‑collector digital output module for Symphony Plus HR series. Output type is sinking open‑collector, load power must be provided externally by field power source. 24VDC load single‑channel maximum 250mA, 48VDC load single‑channel maximum 125mA, suitable for driving intermediate relay, solenoid valve, field indicator light and other low‑power actuators.
‑ Convert digital switching command issued by SPBRC series controller into field switch driving signal. Support communication failure fail‑safe function, when back‑plane bus communication abnormal, output can maintain preset safe state to avoid mis‑operation of field equipment.
‑ Built‑in comprehensive self‑diagnosis function: detect module hardware failure, output channel short‑circuit, load abnormal condition; fault alarm information upload to DCS operator station.
‑ Installed on Symphony Plus HR standard rack, cannot work independently, must cooperate with station controller and matched terminal wiring unit for field actuator connection.
Difference compared with SPDSI22：SPDSI22 is digital input module for collecting field contact feedback signal; SPDSO14 is digital output module for issuing switching control command to field equipment.
‑ Receive digital switching control command from station controller, complete open‑collector digital output drive for field actuators.
‑ Monitor module hardware running status and each output channel load status, short‑circuit and fault information upload to DCS system.
‑ No independent process control logic function, interlock and sequence algorithm run on upper‑level SPBRC bridge controller.
‑ Back‑plane：Rack internal Expander back‑plane module bus for data communication and module power supply.
‑ External interfaces：Connect field relays, solenoid valves and other actuators through matched terminal wiring unit.
‑ Mounting：Plug‑in installation on Symphony Plus HR 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.
- SPDSO14 smart process digital output slave module（6643938X1）
Complementary parts: Symphony Plus HR rack, SPBRC400/SPBRC410 bridge controller, matched digital output terminal unit, field relays / solenoid valve actuators, field external 24VDC power supply, signal cable, system network, operator station.
‑ Insert module into correct I/O slot of Symphony Plus HR rack, tighten front‑panel locking knobs to ensure reliable back‑plane connector contact.
‑ SPDSO14 is open‑collector sinking output, output loop must configure external field power supply, confirm voltage and current match field load parameter. Field signal wiring adopt signal cable, separate layout from high‑voltage power cable to reduce electromagnetic interference.
‑ Module replacement recommends power‑off operation. After replacement, download corresponding configuration, verify each channel output state synchronously changes with DCS control command.
‑ Pay attention to single‑channel current limit parameter, overload will trigger channel over‑current protection.
Power plant, petrochemical, pulp‑and‑paper industry Symphony Plus DCS control cabinets; digital switching control spare‑part, for pump valve logic drive, interlock output, alarm indication, sequence control signal output.
- ABB Symphony Plus SPDSO14 smart process digital output slave module (6643938X1), 16‑channel open‑collector DO I/O slave module for Symphony Plus HR‑series DCS.
- Open‑collector sinking output, adapt to 24VDC /48VDC field load, support communication failure fail‑safe output state setting.
- Group‑channel galvanic isolation, per‑channel short‑circuit and surge protection, 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 digital switching signal output drive, control logic executed by SPBRC series station controller. Distinguished from SPDSI22 digital‑input module.
- Discontinued legacy DCS spare‑part, used for old‑system maintenance and retrofit projects。
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