Electrical Connection¶
The electrical connection is carried out by using removable 9-pin and 11-pin terminal blocks. These terminal blocks differ in their connection system (spring terminals or screw-type terminals, cable mounting from the front or from the side). For more information, refer to Terminal Blocks for S500-eCo I/O Modules.. The terminal blocks are not included in the module’s scope of delivery and must be ordered separately.
The following block diagram shows the internal construction of the digital inputs:
| Terminal | Signal | Description |
|---|---|---|
| 1 | I0 | Input signal I0 |
| 2 | N0 | Neutral conductor for the input signal I0 |
| 3 | I1 | Input signal I1 |
| 4 | N1 | Neutral conductor for the input signal I1 |
| 5 | I2 | Input signal I2 |
| 6 | N2 | Neutral conductor for the input signal I2 |
| 7 | I3 | Input signal I3 |
| 8 | N3 | Neutral conductor for the input signal I3 |
| 9 | — | Reserved |
| 10 | I4 | Input signal I4 |
| 11 | N4 | Neutral conductor for the input signal I4 |
| 12 | I5 | Input signal I5 |
| 13 | N5 | Neutral conductor for the input signal I5 |
| 14 | I6 | Input signal I6 |
| 15 | N6 | Neutral conductor for the input signal I6 |
| 16 | I7 | Input signal I7 |
| 17 | N7 | Neutral conductor for the input signal I7 |
| 18 | — | Reserved |
| 19 | — | Reserved |
| 20 | — | Reserved |
The internal power supply voltage for the module’s circuitry is carried out via the I/O bus (provided by a bus module or a CPU). Thus, the current consumption from 24 VDC power supply at the terminals L+/UP and M/ZP of the CPU/bus module increases by 10 mA per DI571.
An external power supply connection is not needed.
Warning
:strong:Risk of death by electric shock!
The terminals of the module can carry 240 V voltage.
Make sure that all voltage sources (supply and process voltage) are switched off before you begin with operations at the system.
Warning
:strong:Removal/Insertion under power
The devices are not designed for removal or insertion under power. Because of unforeseeable consequences, it is not allowed to plug or unplug devices with the power being ON.
Make sure that all voltage sources (supply and process voltage) are switched off before you
- connect or disconnect any signal or terminal block
- remove, mount or replace a module.
Disconnecting any powered devices while energized in a hazardous location could result in an electric arc, which could create a flammable ignition resulting in fire or explosion.
Make sure that power is removed and that the area has been thoroughly checked to ensure that flammable materials are not present prior to proceeding.
The devices must not be opened when in operation. The same applies to the network interfaces.
Attention
:strong:Risk of damaging the PLC modules!
Overvoltages and short circuits might damage the PLC modules.
- Make sure that all voltage sources (supply and process voltage) are switched off before you begin with operations at the system.
- Never connect any voltages or signals to reserved terminals (marked with —). Reserved terminals may carry internal voltages.
The following figure shows the electrical connection of the digital input module DI571:
Attention
:strong:Risk of damaging the PLC modules!
The PLC modules will be irreparably damaged if a voltage > 240 V is connected.
Make sure that all inputs are fed from the same phase. The module must not be connected to a 400 V voltage.
The module provides several diagnosis functions DI571 - Digital Input Module.
The meaning of the LEDs is described in the section State LEDs DI571 - Digital Input Module.