Product Description

The ABB DSSR122M with part number 48990001-LR is a high-reliability digital signal relay output module designed for ABB industrial distributed control and power automation systems. As a core on-site signal execution and interlock triggering unit, it is responsible for converting internal system logic commands into isolated relay contact signals, realizing equipment status output, safety interlock action and remote signal transmission. It is widely matched with ABB rack control systems to ensure accurate and reliable execution of industrial protection and linkage logic.

This industrial-grade relay module adopts high-isolation circuit design and independent relay output channels, featuring strong signal anti-interference ability and stable contact switching performance. It supports passive dry contact output, which is compatible with various on-site interlock loops and signal acquisition equipment. Built-in complete circuit fault detection and over-load protection functions effectively avoid equipment damage caused by external circuit abnormalities. Equipped with intuitive LED status indicators, it supports real-time feedback of channel action status and module operating conditions. Adopting standard rack-mounted modular structure and conformal coating treatment, it adapts to harsh industrial cabinet environments and supports 24/7 long-term continuous stable operation.

Main Specifications

• Full Part Number: DSSR122M, 48990001-LR; Product Type: Industrial digital relay signal output module

• Applicable System: ABB industrial DCS, power generation control system and process automation platform

• Core Function: System logic signal output, equipment interlock triggering, status signal transmission and circuit protection

• Output Mode: Passive dry contact relay output, suitable for multi-type on-site signal loops

• Isolation Performance: High electrical isolation design to effectively isolate internal and external circuit signals

• Switching Performance: Stable contact action, fast response speed and low switching failure rate

• Protection Mechanism: Built-in over-current, overload and external short-circuit protection functions

• Status Indication: Onboard LED indicators for real-time channel action and module operation status

• Signal Stability: Low signal distortion and strong EMC anti-interference ability for complex industrial scenarios

• Structural Feature: Standard rack plug-in design for quick installation and on-site replacement

• Surface Treatment: Industrial conformal coating for dust-proof, moisture-proof and anti-aging performance

• Operational Reliability: Strict industrial aging tests, low failure rate for long-term interlock control tasks

Core Functions

• Act as the dedicated digital relay output execution unit for ABB industrial control system racks.

• Receive internal system logic control commands and convert them into reliable relay contact actions.

• Output passive dry contact signals to realize on-site equipment interlock and linkage control.

• Transmit equipment operating status and fault alarm signals to upper monitoring systems.

• Isolate external circuit interference and faults to protect internal control system hardware.

• Provide real-time status indication to facilitate on-site inspection and rapid fault troubleshooting.

• Support long-term frequent switching operation of industrial safety interlock loops.

• Guarantee accurate and stable execution of system protection logic and automatic control strategies.

Application Scenarios

• Thermal power plant and power industry control system interlock protection and signal output platforms

• Petrochemical and chemical process industrial equipment linkage control and alarm signal transmission

• Water treatment, metallurgy and manufacturing factory automation interlock control systems

• Industrial sites requiring isolated relay output and high-stability logic execution

• Old ABB relay output module replacement and industrial control system upgrading projects

• Harsh industrial environments with strong electromagnetic interference and long-cycle continuous operation

• All process automation and power control applications based on ABB modular rack architecture