ENEDO-RCB600-ACCC Switching Power Supply

ENEDO-RCB600-ACCC Switching Power Supply

German WE02-6P100E24/OHN solenoid valve

PMV F5-MEC-420 valve positioner feedback device

KELVION GBS700M-U-78 oil cooled heat exchanger Parker KZ3673 pneumatic solenoid valve coil

WEG 02518EP3E284T(25/18.5KW)

Supply BEA MATRIX D 12-24 geomagnetic switch

Portable Leather Moisture Tester AQUA-PICCOLO AP-D-Le

R+W 188-A1Z FF SW 618.6740.644 travel switch

German GMC 707-214DB140 angle sensor angle position transmitter

Supply Gessmann PW1200822-030 V61LM master controller original factory

AEG 2A400-280 HRL1 power regulator

2649ABYN00022FAN-AR2 West Lock Limit Switch

BD 342003 Sheath Fluid

3A 400-170 H RLP1 power regulator

STAUFF SPB-S-5-10-S080-A

GRUNDFOS MG80B2-19FT100-D1 water pump motor

ROTEK'ROBASE 36.2-W250.F-X from Germany (original model)

MVSI 3/800-S02, 230/400 V, 50 Hz, 3000 min-1

ENEDO-RCB600-ACCC Switching Power Supply

GENERANT - Check Valve-OPC-4PB-B-1

Shandong Zhongfa Industrial specializes in importing European and American imported parts from Germany, the United States, Italy, and other countries; Main products: Industrial spare parts, mechanical and electrical components, commonly used instruments and meters, mechanical equipment, etc.

Industrial knowledge

5) Special attention should be paid to the type selection of the three wire proximity switch connected to the PLC digital input module. PLC digital input modules can generally be divided into two types: one type has a common input terminal as the negative terminal of the power supply, and current flows out from the input module. In this case, NPN type proximity switches must be selected; Another type of common input terminal is the positive pole of the power supply, and current flows into the input module. In this case, it is necessary to use a PNP type proximity switch. Don't choose the wrong one.

6) The two-wire proximity switch is limited by working conditions. When it is turned on, the switch itself generates a certain voltage drop, and when it is turned off, there is a certain residual current flowing through it. Therefore, it should be considered when selecting it. Although the three wire proximity switch has an additional wire, it is not affected by adverse factors such as residual current and works more reliably.

7) Some manufacturers will simultaneously output the "normally open" and "normally closed" signals of the proximity switch, or add other functions. In this case, please follow the product manual for specific wiring.

Slot type photoelectric switch wiring

The diode of the photoelectric switch is a light-emitting diode, and the output is a phototransistor. C is the collector and E is the emitter.

When a transistor is used as a switch, the collector is usually used as the output terminal.

General connection: The diode is the input terminal, E is grounded, C is connected to the load, and the other end of the load needs to be connected to a positive power supply. This method has a wide range of applications.

Special connection method: The diode is the input terminal, C is connected to the positive power supply, E is connected to the load, and the other end of the load needs to be grounded. This connection method is only applicable when the equivalent resistance of the load is very small (within a few tens of ohms). If the equivalent resistance of the load is relatively large, it may cause the working point of the switch transistor to be abnormal, resulting in unreliable switch operation.

Working principle, common types, and performance comparison of fuses

Working principle

A type of electrical appliance that uses metal conductors as a melt connected in series in a circuit. When an overload or short-circuit current passes through the melt, it melts due to its own heating, thereby breaking the circuit. Fuses have a simple structure and are easy to use, widely used as protective devices in power systems, various electrical equipment, and household appliances.

Common types

Plug in fuse: It is commonly used at the end of lines with voltage levels of 380V and below, as a short-circuit protection for distribution branches or electrical equipment.