Power Connection

Control voltage U_s: 24V

Power is supplied to the fieldbus, the processor logic, the inputs and the sensors from the 24 V_DC control voltage U_s. The control voltage is electrically isolated from the fieldbus circuitry.

Load voltage U_p 24V

The load voltage U_p supplies the digital outputs; it can be brought in separately. If the load voltage is switched off (e.g. if the emergency off has been used) the fieldbus functions and the power supply and functionality of the inputs are retained.

Redirection of the supply voltages

The IN and OUT power connections are bridged in the module (not IP204x-Bxxx and IE204x). The supply voltages U_s and U_p can thus easily be transferred from Fieldbus Box to Fieldbus Box.

Note

Warning

For the redirection of the supply voltage Us and Up, the maximum permissible current of 4 A must not be exceeded!

Electrical isolation

Digital modules

In the digital input/output modules, the grounds (GND) of the control voltage and the load voltage are connected!

Analog modules

In the analog input/output modules these grounds are separated in order to ensure electrical isolation of the analog signals from the control voltage. In some of the analog modules the sensors or actuators are supplied by U_p - this means, for instance, that in the case of 0..10V inputs, any reference voltage (0...30V) may be connected to Up; this is then available to the sensors (e.g. smoothed 10 V for measuring potentiometers). Details of the power supply to analog modules should therefore be consulted in the section on Signal types.

Note

Warning

If digital and analog fieldbus boxes are connected directly via four-core power leads, the analog signals in the fieldbus boxes are no longer electrically isolated from the control voltage!

PIN assignment (not IP204x-Bxxx and IE204x)

IP204x-Bxxx and IE204x

PIN assignment (IP204x-Bxxx and IE204x)