24V switching power supply, 220V input and output three terminals: 24V + 24V- GND.
Excuse me. Where is this GND connected?
In the PLC (such as Siemens) on the L + M to (ground that symbol)
Switching power supply is connected to the ground in the PLC?
There are some sensors on the terminal marked with three vertical and horizontal grounding symbol, but also to be connected to the switching power supply on the symbol terminal?
What is the relationship between the chassis and the switching power supply on this land? Is it a thing?
Yes, the reason why there are so many places, is to solve the EMC used
You said too messy, I read for a long time, I still use my logical language to tell you! There are some high-end switch, lamp or import switch, the lamp is a ground option. As you said 24V switch, GND should be connected to the switch box or case, assuming that the switch box and the case is non-metallic natural do not have to pick up, the ground is mainly for the metal chassis with electrical appliances, when the fire line leakage On the chassis, the chassis connected to the ground short circuit lead to tripping, play a safe role, so your power must have three lines, that is, line of fire, zero line, ground, your electrical appliances with a ground mark Place to be connected to the power ground, I do not know if you understand, if any questions please continue to ask!
If you confirm that the module is a single 24V output, then the GND is connected to the shell
The chassis is the earth is very much metal shell of the equipment need to shell the earth
24V switching power supply, 220V input and output three terminals: 24V + 24V- GND.
Excuse me. Where is this GND connected? "
The switching power supply is a dual power supply that is positive or negative output, but we commonly used electrical equipment is generally used in the positive end 24 + then negative on the receiving GND. If your electrical equipment then +24 and -24 port, then 48V will burn. In a word, it is estimated that your electrical equipment is a positive power input, you can then +24 and GND
"What is the relationship between the chassis and the switch on this ground? Is it a thing?"
They are not the same. Case is the anti-touch the earth. The power source is quite zero with the point.
The other has not seen in the end what, do not know I do not say
On the first floor is the input of the land
