Features

1. AC output, using bidirectional thyristor output, zero voltage on, zero current off.

2. The DC output adopts bipolar transistor output, with low conduction voltage, fast switching speed and strong anti-interference.

3. The input signal is compatible with TTO and COMS digital logic circuits.

4. Optical isolation between input loop and output loop.

5. The isolation voltage between the input terminal and the output terminal is 2500V.

6. Single in-line circuit board welding installation, standard modular size.

7. 100% load current aging test, passed European CE certification, international ISO9000 certification, and domestic 3C certification.

Model meaning

Technical parameters

Appearance and installation dimensions/wiring diagram

Product application

MJGX circuit board type solid state relay adopts flame retardant engineering plastic shell, epoxy resin potting, single in-line circuit board welding installation, standard modular size. Compared with electromagnetic relay, it has no mechanical sound, no contact arcing, higher surge current bearing capacity, long life and high reliability.

The input drive current is small, which can be easily interfaced with computer terminals and various digital program-controlled circuits, realizing the isolation and control of weak power.

It is widely used in the fields of automation control such as petrochemical instruments and equipment, food machinery, packaging machinery, textile machinery, CNC machine tools, plastic machinery, fitness equipment, and entertainment facilities. It can control small motors, incandescent lamps, indicator lights, low-power power supplies, intelligent instruments and meters, and various solenoid valves, etc. It can also be used as a driving stage for high-power electromagnetic contactors. It is particularly suitable for harsh environments such as corrosion, moisture, dust, and explosion-proof, and occasions with frequent switching.

Safety precautions

1. When used with AC inductive loads, high transient voltages and surge currents are applied to the output end, which may cause the solid-state relay to conduct or be damaged. It is usually necessary to connect a voltage control device with a specific clamping voltage to the output end, such as Bi-wire zener diode or varistor (MOV). It is recommended that the varistor be 1.6-1.9 times the rated voltage;

2. For DC inductive loads, such as solenoids, electromagnets, and electromagnetic valves, a freewheeling circuit must be used to suppress the back electromotive force generated during shutdown. Usually the simpler method is to connect a diode in reverse parallel with the load, but this The circuit will affect the release time of inductive loads such as electromagnetic relays, contactors, electromagnets, solenoid valves, etc. A better circuit is a diode and a Zener diode connected in reverse series or a diode connected in series with a resistor and then inversely connected to the load. in parallel.

3. When controlling a smaller current load close to the minimum load current, a virtual load resistor must be connected in parallel to the load to reduce the output leakage current and produce a higher residual voltage on the load.

4. When welding and installing circuit board welding-mounted relays, the welding temperature must be controlled below 260 degrees Celsius, and the welding time must be controlled below 5 seconds.

5. In order to prevent the temperature rise of solid-state relays from exceeding the allowable value, the heat dissipation effect and installation location should be considered when designing and applying. When two or more solid-state relays are installed side by side, appropriate spacing should be left.