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Dear Control community,
I am studying about ControlLogix IO modules 1756-IB32, with the respective link to the picture below.
http://literature.rockwellautomation.com/idc/groups/literature/documents/um/1756-um058_-en-p.pdf
Page 142 1756-IB32
In the IB32: Voltage from IN-0 (10-30V) passes through the Current Limiter, the LED, and finally through the GND-0 Ground.
The LED will emit light to the Optical transistor's gate terminal, and it will pass the current from the to the collector terminal (+5V) to the ControlLogix Backplane Interface and into the Display.
This is what I don't understand, how come when IN-0 is ON, the IO module (IB32) will be powered on, do it's function (sending information to Processor, sending data to display...etc...), and if IN-0 is OFF, the Module will be off.
I always thought that, there is a power supply that provides a signal and another power to the IO modules.
Kindly help me on this matter.
Thank you in advance.
Forat
I am studying about ControlLogix IO modules 1756-IB32, with the respective link to the picture below.
http://literature.rockwellautomation.com/idc/groups/literature/documents/um/1756-um058_-en-p.pdf
Page 142 1756-IB32
In the IB32: Voltage from IN-0 (10-30V) passes through the Current Limiter, the LED, and finally through the GND-0 Ground.
The LED will emit light to the Optical transistor's gate terminal, and it will pass the current from the to the collector terminal (+5V) to the ControlLogix Backplane Interface and into the Display.
This is what I don't understand, how come when IN-0 is ON, the IO module (IB32) will be powered on, do it's function (sending information to Processor, sending data to display...etc...), and if IN-0 is OFF, the Module will be off.
I always thought that, there is a power supply that provides a signal and another power to the IO modules.
Kindly help me on this matter.
Thank you in advance.
Forat