ABB DSTA171 (3BSE018311R1) Digital I/O Termination Unit — Product Description

Overview

The ABB DSTA171 Connection Unit provides a structured interface for routing digital and analog signals between Advant OCS or Master DCS controllers and external field devices. It offers stable signal handling that helps reduce wiring errors in busy automation panels. Moreover, its durable construction supports long-term performance in demanding industrial plants where reliability directly affects uptime.

Main Features

The unit accommodates mixed digital and analog channels, giving engineers flexibility when designing process-control architectures. In addition, its optical isolation improves system stability by minimizing noise transfer between field circuits and the control bus. The DSTA171 also supports rapid response times, allowing it to function well in high-speed automation sequences. Its compact form helps simplify cabinet integration while maintaining organized wiring paths.

Technical Specifications

Model: DSTA171
Part Number: 3BSE018311R1
Type: Connection / Termination Unit
System Compatibility: ABB Advant OCS / Master DCS
Channels Supported: 16 channels (8 digital inputs + 8 digital outputs typical)
Signal Types: Digital 24 VDC logic; Analog ±10 V, 0/4–20 mA depending on configuration
Isolation: Optical isolation between channels and system bus
Output Current Capacity: Up to 0.5 A per digital output channel
Response Time: < 1 ms for digital I/O
Communication Interface: ModuleBus via S800 I/O
Dimensions: 234 × 45 × 99 mm
Weight: 0.12–0.25 kg
Mounting Method: DIN-rail or rack installation
Operating Temperature: –20 °C to +55 °C
Storage Temperature: –40 °C to +70 °C
Protection Class: IP20
Certifications: CE, UL, RoHS
Country of Origin: Sweden

FAQ

1. What type of systems use the ABB DSTA171?
It connects to ABB Advant OCS and Master DCS platforms in industrial automation environments.

2. How many channels does the module support?
It supports 16 channels, typically arranged as eight inputs and eight outputs.

3. Does the device support analog signals?
Yes, depending on configuration, it supports ±10 V and 0/4–20 mA signals.

4. How fast is the digital response?
The digital channels offer response times under one millisecond for high-speed control tasks.

5. Can it be installed on DIN-rail mounts?
Yes, technicians can install it on DIN-rails or mount it inside ABB racks.