ABB DSTD150A
ABB DSTD150A
ABB DSTD150A
ABB DSTD150A
ABB DSTD150A

ABB DSTD150A | Symphony Series Analog Signal Conditioning Module for Harmony Racks

  • Brand: ABB
  • Model: DSTD150A
  • Product Type: Analog Signal Transmission Module
  • Series: Symphony Harmony (Symphony Plus)
  • Core Function: Conditions and transmits 8-channel analog signals (4-20mA, 0-10V) from field devices to Symphony Harmony DCS controllers via Profibus DP.
  • Key Specs: 8 isolated analog channels, 4-20mA/0-10V input range, Profibus DP (12 Mbps), -25°C to +60°C operating temperature.
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Part number: ABB DSTD150A
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Description

DSTD150A: Product Overview
The ABB DSTD150A is an 8-channel analog signal transmission module designed for integration into ABB Symphony Harmony distributed control system (DCS) architectures. Positioned as a field-to-controller interface, its primary role is to acquire analog signals from industrial sensors—such as temperature transmitters, pressure gauges, and flow meters—condition these signals to eliminate noise, and transmit standardized data to Symphony Harmony master controllers (e.g., AC800M) for process control logic. This module is critical for maintaining accurate process variable representation in continuous operations, where signal fidelity directly impacts regulatory compliance and equipment safety.
Functionally, the DSTD150A processes inputs from 8 independently isolated channels, each configurable for 4-20mA (current loop) or 0-10V (voltage) signals. It incorporates filtering and amplification circuitry to mitigate electromagnetic interference (EMI) common in industrial environments, ensuring signal integrity. Communication with the DCS master occurs via Profibus DP (up to 12 Mbps), supporting cyclic data exchange for real-time control and acyclic messages for diagnostics. As part of the Symphony Harmony family, the module leverages the platform’s modular design, hot-swappable components, and compatibility with ABB’s Control Builder M engineering tool. Benefits include simplified system expansion, reduced wiring complexity, and unified configuration workflows across I/O racks, enabling engineers to adapt to evolving process requirements without full system redesign.

ABB DSTD150A

ABB DSTD150A

DSTD150A: Technical Specifications
  • Model Number: DSTD150A
  • Manufacturer: ABB
  • Product Type: Analog Signal Transmission Module
  • Number of Channels: 8 (individually isolated)
  • Input Signal Types: 4-20mA (current loop), 0-10V (voltage)
  • Input Range: 4-20mA (±0.1mA accuracy), 0-10V (±0.05V accuracy)
  • Isolation Voltage: 1500VAC (channel-to-channel, channel-to-bus)
  • Signal Response Time: <10 ms (input change to master update)
  • Communication Protocol: Profibus DP (up to 12 Mbps)
  • Operating Temperature: -25°C to +60°C
  • Humidity Range: 5% to 95% non-condensing
  • Power Supply: 24V DC (from rack backplane, 18-32V DC range)
  • Power Consumption: 2.0W (typical, all channels active)
  • Dimensions: 25mm x 128mm x 115mm (width x height x depth)
  • Weight: 0.22kg
  • Certifications: CE, UL, cULus, RoHS
Core Features & Customer Value​
The DSTD150A’s design prioritizes signal integrity and operational efficiency for industrial automation engineers. Its 8-channel density reduces cabinet footprint compared to lower-density analog modules, minimizing wiring complexity and material costs in systems with multiple sensors (e.g., a distillation column requiring 6 temperature and 2 pressure inputs). For a water treatment plant, this means fewer modules to mount and calibrate, streamlining initial installation.
Galvanic isolation (1500VAC) is critical for rejecting EMI from high-power equipment like VFDs or motors. In chemical plants with agitators, induced noise can distort analog signals, leading to incorrect control actions. The DSTD150A’s isolation ensures pH, flow, or level measurements are transmitted accurately—vital for preventing chemical overdosing or reactor instability.
Built-in diagnostics enhance maintenance efficiency. The module monitors channel faults (open/short circuit, signal saturation), power supply health, and communication status, reporting issues to the DCS master via LED indicators and software logs. For maintenance teams, this reduces troubleshooting time from hours to minutes; a failed temperature transmitter in an oil refinery can be identified without invasive testing.
Hot-swap capability allows replacement without system shutdown, critical for continuous processes like power generation. Technicians remove the faulty module and install a new one; the DCS automatically reloads configuration data, eliminating scheduled downtime. Integration with Control Builder M enables engineers to reuse analog channel profiles across projects, cutting commissioning time by 20%.

ABB DSTD150A

ABB DSTD150A

Typical Applications​
The ABB DSTD150A is deployed in Symphony Harmony DCS environments requiring analog signal acquisition. In a petroleum refinery’s crude distillation unit, it connects 8 temperature transmitters (4-20mA) to the DCS master, monitoring column tray temperatures. Profibus DP ensures real-time data transmission for reflux ratio adjustments, while 1500VAC isolation withstands EMI from nearby pumps.
At a chemical plant’s polymerization reactor, the module acquires 4 pH sensor signals (0-10V) and 4 flow meter outputs (4-20mA). Its -25°C cold-start capability supports winter startups, and hot-swap functionality allows maintenance during planned turnarounds without halting production.
In a municipal wastewater treatment plant, the DSTD150A interfaces with 6 dissolved oxygen sensors (4-20mA) and 2 turbidity meters (0-10V) across aeration basins. Data is transmitted via Profibus DP to the central SCADA system, enabling remote adjustment of blower speeds. The module’s compact size (25x128x115mm) fits into space-constrained I/O racks, simplifying retrofits in aging facilities.

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