FOXBORO 130M-N4 Pneumatic Rack Mounted Instrument

Description

An old man went to the People’s Bank of China to withdraw money and walked directly to the window. The security guard came over and said, “Grandpa, press the number.” The security guard said, “Press the number.” The old man thought to himself, “It’s a big bank indeed, and when he withdraws money, he needs a secret code. So he whispered to the security guard,” The king covers the tiger. “The security guard helplessly helped the old man press out a queue ticket, and the old man thought to himself,” I’m scared to death, I’ve been fooled!

In MAN, when the output adjustment wheel rotates, the output will change. The direction of rotation of the wheel will cause the output pointer to move in the same direction (moving to the left to reduce output, etc.). The arrow above the wheel is the direction to turn the wheel to close the control valve, as stated in the sales order. When the transfer switch is moved to AUTO, the measured value will approach the set value at a reset rate. (For controllers that have not been reset, align the set point index with the measurement pointer before transfer to prevent process confusion.)

Reasonable wiring
1) I/O lines, power lines, and other control lines should be routed separately and should not be routed in the same slot as much as possible.
2) It is best to separate the AC and DC lines, as well as the input and output lines.
3) It is best to separate the I/O lines for switching and analog signals. For I/O lines that transmit analog signals, it is best to use shielded wires, and one end of the shielding layer of the shielded wire should be grounded.
4) The signal transmitted by the cable between the basic unit and expansion unit of the PLC is small, high-frequency, and easily interfered with. It cannot be buried in the same slot as other wiring.
5) The I/O circuit wiring of PLC must use crimping terminals or single stranded wires, and it is not advisable to directly connect multiple stranded wires to the PLC wiring terminals, otherwise sparks may occur.
6) Installed in the same control cabinet as the PLC, although it is not a inductive component controlled by the PLC, it should also be connected in parallel with an RC or diode arc suppression circuit.