ABB DSTC176 (57310001-KT) Bus Extension Terminator Unit

ABB DSTC176 57310001-KT is a dedicated bus terminator module developed for ABB Advant OCS legacy distributed control system.

 It is installed at the physical end of the control communication bus, built-in precision 120Ω impedance matching resistor, eliminating signal reflection, 

waveform oscillation and transmission distortion generated at bus cable terminals during long-distance RS485/CAN bus communication.

When the system expands bus length or adds remote I/O sub-racks, this unit ensures complete impedance matching of the whole bus network, stabilizes data transmission quality, 

prevents communication packet loss, node offline and bus crash faults. It is a mandatory matching spare part for maintenance, transformation and capacity expansion of petrochemical, 

power plant Advant OCS control system communication networks.

Technical Specifications

Part Number: DSTC176, OEM code: 57310001-KT

Manufacturer: ABB, Origin: Sweden

Type: Bus Terminal Matching / Bus Extension Terminator Unit

Matching System: ABB Advant OCS DCS Control System

Supported Bus Protocol: RS-485, CAN Bus

Built-in Termination Resistance: 120Ω standard bus matching resistance

Communication Baud Rate Range: 19.2kbps ~ 115.2kbps

Operating Power Supply: DC 18V ~ 36V

Max Power Consumption: ≤1W

Installation Mode: Standard DIN rail mounting

Overall Dimension: 112mm × 77mm × 20mm

Net Weight: Approx. 0.08kg

Operating Temperature: -20℃ ~ +60℃

Storage Temperature: -40℃ ~ +85℃

Humidity: 5%~95% non-condensing

Protection Class: IP20 (Indoor cabinet installation)

Certification: CE

Key Features

Built-in precise 120Ω termination resistor, realizes full bus impedance matching, effectively suppresses signal reflection and long-distance transmission interference.

Low power consumption design, stable continuous operation for a long time without affecting bus load balance.

DIN rail snap-on installation, simple wiring, quick on-site installation and replacement without system downtime.

Dual-channel communication interface design, convenient for series bus expansion and remote cabinet networking transformation.

Industrial reinforced plastic housing, anti-vibration and anti-interference, adapt to complex electromagnetic environment inside control cabinets.

Exact original replacement accessory for Advant OCS bus network modification, solving common communication instability faults of old DCS systems.