DSTC404 57520001-DS Powered Terminator, China DSTC404 57520001-DS Powered Terminator Manufacturers, Suppliers, Factory

Overview

Place of Origin:	Sweden
Brand Name:	ABB
Model Number:	DSTC404 57520001-DS
Packaging Details:	Original new Factory Sealed
Delivery Time:	5-7 days
Payment Terms:	T/T
Supply Ability:	In stock

Specifications

Product Model:	DSTC404 57520001-DS
Type:	Powered Terminator
Application:	Used on the SDB side
Dimensions (L×H×W):	260 x 10 x 120 mm
Weight:	0.02 kg
RoHS Compliance:	Complies with EU Directive 2011/65/EU
WEEE Category:	5 (Small Equipment, no external dimension > 50 cm)
Number of Batteries:	0

Description

The DSTC404 57520001-DS is needed in conjunction with the modem DSTC452. The modem connects from the SDB to the LDB. The 404 is used on the SDB side as termination, one is needed per modem. DSTC404 57520001-DS is used if the modem is an "intermediate" modem.

Applications

Power/Energy Plants: Provide signal protection at the bus ends of turbine control and power plant auxiliary systems (BOP).

Oil/Petrochemical Plants: Eliminate bit errors caused by electromagnetic interference in long-distance distributed I/O stations.

Steel/Metallurgical Plants: Maintain high-speed synchronization of the S100 I/O bus in high-temperature, high-electromagnetic environments.

Paper/Pulp Plants: Provide physical layer protection for multi-frame I/O expansion on large production lines.

Troubleshooting

Fault Symptoms:

Intermittent Communication Interruption: Unstable bus voltage levels due to abnormal power supply to the active terminal.

Data Overflow/Error: Severe bus reflection causes the controller to receive erroneous data.

Troubleshooting:

Check if the external power cable of the DSTC404 is loose or has unstable voltage.

Monitor the bus waveform with an oscilloscope to confirm if the terminating impedance is faulty.

FAQ

Q1: Why is the DSTC404 57520001-DS called an "active" terminator?
A: Unlike passive resistors, the DSTC404 57520001-DS uses an external power supply to provide a stable bias for the bus, improving anti-interference in long-distance communication.

Q2: Where should the DSTC404 57520001-DS be installed?
A: It must be installed at the very end of the S100 I/O bus to properly block signal reflections.

Q3: What happens if the DSTC404 57520001-DS loses power?
A: Bus signal quality will drop significantly, leading to frequent “Bus Communication Errors” and potentially causing the entire I/O cluster to go offline.

Q4: Can the DSTC404 57520001-DS replace the DSTC176?
A: No. The DSTC176 is a passive terminator, while the DSTC404 57520001-DS is designed for systems requiring active bias or redundant connections (e.g., MP200/AC450).

Q5: Is the DSTC404 57520001-DS easily damaged?
A: It is industrial-grade and long-life, but voltage surges or interface shorts are the main risks. Using proper power protection is recommended.