DSSR122 4899001-NK Single Channel Solid State Relay

Description

DSSR122 4899001-NK Product Description:
DSSR122 4899001-NK is a single channel solid-state relay designed specifically for AC load control in industrial automation systems. As a key component in power distribution and control panels, it serves as an electronic switch that uses semiconductor devices (such as bidirectional thyristors) to connect or disconnect AC power to loads without the need for moving parts. This module adopts a compact design with built-in surge suppression function, suitable for independent applications as well as integration into systems controlled by programmable logic controllers (PLC) or distributed control systems (DCS).

DSSR122 4899001-NK

DSSR122 4899001-NKsimplifies power control without the need for external buffer circuits or surge protectors. Its low control power consumption requirement (5-32 V DC) allows for direct connection to the PLC output interface, while isolated inputs ensure noise resistance in high electromagnetic interference (EMI) environments. The value proposition of this solid-state relay lies in its reliability in long-term, high cycle applications where mechanical relays can fail due to wear and tear – a key advantage for all-weather manufacturing operations or difficult to access installations such as offshore platforms.

DSSR122 4899001-NK

Main features and advantages:
High power processing capability: DSSR122 4899001-NK can switch resistive loads up to 25 A at 240 V AC or inductive loads up to 15 A at 480 V. The zero crossing function of its resistive load can reduce surge current and electromagnetic interference (EMI), making it very suitable for heating elements or incandescent lighting. For inductive loads such as motors and transformers, random switching allows for immediate response to control signals, reducing delays in critical processes.

Durable design, suitable for harsh environments: The sealed housing of this solid-state relay prevents the intrusion of dust, moisture, and corrosive gases, meeting the IP20 standard for indoor use. It operates reliably within a wide temperature range of -40 ° C to+80 ° C and is suitable for extreme environments such as foundries or refrigeration facilities. The low power consumption of this module (≤ 2.5 W) can reduce heat accumulation in the control panel even during continuous operation.

Electrical isolation and noise resistance capability: DSSR122 4899001-NK provides 2.5 kVrms isolation between input and output to prevent grounding circuits and voltage spikes from affecting control signals. The input side accepts a wide range of DC voltages from 5-32 V and is compatible with standard PLC outputs (such as 24 V DC). The built-in LED indicator provides visual feedback on input status (active/high), simplifying troubleshooting in field applications.

Long lifespan and low maintenance: As a solid-state device, this solid-state relay has a rated lifespan of over 100 million operations, significantly longer than electromechanical relays. This reduces the frequency of replacement and related downtime, making it cost-effective for high cycle applications such as packaging machines or conveyor systems. The design without moving parts also eliminates contact bounce, ensuring precise switching every cycle.

DSSR122 4899001-NK

Technical specifications:
Model DSSR122 4899001-NK
Brand ABB
Type: Single channel solid-state relay (AC output)
Control input voltage 5-32 V DC (compatible with TTL/CMOS)
Input current ≤ 15 mA (at 24 V DC)
Output voltage range 24-480 V AC
Output current (resistive) 25 A (240 V AC), 15 A (480 V AC)
Output current (inductive) 15 A (240 V AC), 10 A (480 V AC)
Isolation of 2.5 kVrms (input-output)
Switching between resistive load zero crossing and inductive load random
Working temperature -40 ° C to+80 ° C
Installation method: DIN rail (TS 35/7.5) or panel installation
Dimensions 45 mm (width) x 90 mm (height) x 60 mm (depth)
Weight 0.2 kg
Certified CE, UL, cUL, RoHS
Environmental grade IP20, IEC 61000-6-2 (compliant with electromagnetic compatibility standards)

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Application areas:
Reliable switching of high-power loads is crucial in industrial control systems. DSSR122 4899001-NK Solid State Relay (SSR) is a durable, contactless solution suitable for managing resistive or inductive loads. This module is designed for harsh environments and is widely used in industrial furnaces, packaging machinery, and process heating systems. It can control heaters, solenoid valves, or motor starters to avoid mechanical wear and tear. For example, in a plastic manufacturing factory, DSSR122 4899001-NK may regulate the temperature of the extruder heater by switching the AC power supply based on PID controller signals, thereby ensuring consistency in material quality. In food processing production lines, it can be used to control steam valves in sterilization chambers, providing fast response and precise control, which is crucial for hygiene operations.

This solid-state relay performs well in applications that require high switching frequency or vibration resistance, such as conveyor belt drives in mining or cooling systems in CNC machine tools. Engineers value its ability to eliminate arcing and mechanical fatigue, which reduces maintenance costs compared to traditional electromechanical relays. By combining zero crossing switches (for resistive loads) and random switches (for inductive loads), DSSR122 4899001-NK addresses the challenges of reducing electrical noise and extending load life in different industrial environments.

Related product introduction:
DSSR124-4-channel solid-state relay module, suitable for multi load applications that require compact design.
DSRI110- Relay Interface Module, used to connect PLC outputs to high-power solid-state relays or electromechanical relays.
TA541- Terminal adapter for power cables, simplifying the connection between solid-state relays and load devices.
PS501-24V DC power supply ensures stable control voltage of the solid-state relay input circuit.
CM572- Modbus RTU communication module, supports remote monitoring of solid-state relay status through SCADA system.
ABB Tmax XT circuit breaker – overcurrent protection device, used in conjunction with solid-state relays to prevent short circuits or overloads.

Installation and maintenance:
Precautions before installation:
Ensure that the rated current of the solid-state relay is 20-30% higher than the maximum current of the load to account for surge currents in inductive loads.
Install solid-state relays vertically on DIN rails or heat sinks to facilitate heat dissipation, leaving at least 25 mm of space between adjacent modules at high ambient temperatures.
Use multi stranded copper wire (12-16 AWG) for power connection and twisted pair for control signal wiring to reduce electromagnetic interference.
Maintenance suggestion:
Perform a visual inspection every six months: check for loose terminal connections, signs of overheating (such as discoloration), or damaged casing.
Every year, the functionality of solid-state relays is tested by applying control signals and measuring the voltage at the load using a multimeter to ensure correct switching and isolation.
In dusty or humid environments, clean the module with a dry cloth or compressed air to prevent debris from affecting heat dissipation or electrical contact.
For high reliability applications, consider deploying redundant solid-state relays and equipping them with bypass switches for maintenance without interrupting operation.

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