SINAMICS SIRIUS series switchgear

(3) Accessories and Selection

Core accessories:

Accessory type, model, example, function description, ordering unit, corresponding page number

Detachable terminal 3ZY1122-1BA00 2-pole, screw terminal, maximum 4mm ² wire 6 units 5/26

Hinge cover 3ZY1450-1AB00 titanium gray, no terminal identification, protective terminal 5 units 5/26

Code pin 3ZY1440-1AA00 mechanical code terminal to prevent accidental insertion of 12 units 5/26

Special screwdriver 3RA2908-1A 3.0 × 0.5mm, designed for dismantling spring type terminals with 1 unit 5/26

Selection precautions: It is necessary to clarify the "number of contacts → terminal type → contact material → coil voltage", for example, "3RQ2000-2CW01" represents "2 conversion contacts, spring terminals, hard gold-plated contacts, 24-240V AC/DC coils".

3RQ3 series (narrow design type, 6.2mm)

(1) Product positioning and core innovation

Specially designed for high-density control cabinets, with a width of only 6.2mm (1/4 of traditional coupling relays), it is a representative of Siemens' "miniaturized coupling relays", with core innovations including:

TOP wiring+spring type terminal: front wire entry, tool free wiring, suitable for batch installation (such as automated production line control cabinets);

Multiple output types: Relay output (non plug/unplug) and semiconductor output are optional, suitable for different switching frequency requirements;

Integrated protection function: reverse polarity protection, EMC arc suppression diode, reducing the use of external protection components.

(2) Product Classification and Technical Parameters

Product classification: Divided into 3 categories based on output type, the core differences and parameters are as follows:

Output Type Model Series Contact/Output Characteristics Coil Voltage Range Operating Temperature Insulation Voltage Corresponding Page Number

Relay output (non plug and play) 3RQ3018/3RQ3038 1 conversion contact, AgSnO2/hard gold-plated 24~230V AC/DC -25~+60 ℃ 300V 5/34

Relay output (plug-in type) 3RQ3118 1 conversion contact, can quickly replace relay 24~230V AC/DC -25~+60 ℃ 300V 5/34

Semiconductor output (non plug and play) 3RQ3050/3RQ3070 contactless, 1mA~5A current capacity 11~30V DC/110~230V AC/DC -25~+60 ℃ 300V 5/34

Key performance differences:

Relay output: with a mechanical lifespan of 10 million cycles, suitable for switching between medium and low frequencies (≤ 1000 cycles/hour);

Semiconductor output: No mechanical wear, suitable for high-frequency switching (≤ 10000 times/hour), no contact bounce and noise.

(3) Accessories and Application Scenarios

Core accessories:

Accessory type, model, example, function description, ordering unit, corresponding page number

Isolation board 3RQ3900-0A electrically isolates different voltage circuits to prevent crosstalk of 10 units 5/35

Connect comb 3RQ3901-0A (2-pole) to the same potential terminal, with a current capacity of 6A 10 units 5/35

Label 3RQ3902-0A (5 × 5mm) Terminal Identification, White Handwritten 2000 units 5/35

Replace relay module 3TX7014-7BM00 with 3RQ3118, AgSnO2 contacts 15 units 5/35

Typical application scenarios:

Relay output: signal coupling between PLC and contactor (such as motor start stop control);

Semiconductor output: sensor signal amplification (such as photoelectric switch → PLC input), high-frequency light control.

3. LZS/LZX series (plug-in customized type)

(1) Product positioning and core features

Specially designed for customized control requirements, supporting free combination of "relay module+base+accessories", with core features including:

Multi type coverage: PT (industrial type, 28mm wide), MT (circular base, 38mm wide), RT (printed type, 15.5mm wide), suitable for different installation scenarios;

High environmental adaptability: Operating temperature -40~+70 ℃, can be used in extreme environments (such as outdoor control cabinets, high-temperature ovens);

Easy to maintain: Plug in relays can be replaced without disconnecting wires, reducing maintenance time by 80%.

(2) Product Classification and Technical Parameters

Product classification: Divided into 3 categories by structure, with the following core parameters:

Type Width (mm) Contact Quantity Terminal Type Coil Voltage Range Operating Temperature Insulation Voltage Corresponding Page Number

PT type (industrial) 28 2/3/4 conversion screw/spring terminal 24~230V AC/DC -40~+70 ℃ 250V 5/40~5/42

MT type (circular base) 38 3 conversion screw terminal 24~230V AC/DC -40~+60 ℃ 250V 5/42

RT type (printing) 15.5 1/2 conversion screw/spring terminal 24~230V AC/DC -40~+70 ℃ 250V 5/43

Special Features:

PT type: equipped with a test button (to forcibly switch relay status), LED module (24V DC version including freewheeling diode);

MT type: 11 pole circular base, suitable for special installation requirements (such as aerospace equipment);

RT type: 5mm pin spacing, suitable for printed circuit board (PCB) installation.

(3) Customized assembly and accessories

Customized assembly logic: Users can select in the order of "relay module → base → LED module → protective component", as shown in the following example: