Electrical Connection¶
The input module DI571 can be connected to the following devices via the I/O-Bus connector:
- S500 Bus Modules (e. g. CI592-CS31, CI501-PNIO, CI541-DP, CI581-CN)
- AC500 CPUs (PM5xx)
- other AC500 I/O Modules
Note
The DI571 must not be used as a remote expansion module at DC505-FBP and CI590-CS31-HA Bus Modules.
Note
Mounting, disassembling and electrical connection for the I/O Modules are described in detail in S500 System Data.
The electrical connection is carried out by using a removable 9-pole and 11-pole Terminal Block. 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:
The assignment of the terminals:
| Terminal | Signal | Meaning |
|---|---|---|
| 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 V DC 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:Danger of life through 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 are beginning with operations at the system.
Attention
:strong:Risk of damaging the PLC modules!
The PLC modules can be damaged by overvoltages and short circuits.
- Make sure that all voltage sources (supply and process voltage) are switched off before you are beginning with operations at the system.
- Never connect any voltages or signals to reserved terminals (marked with —). Reserved terminals may carry internal voltages.
Attention
:strong:Risk of damaging the PLC modules!
The PLC modules must not be removed when the plant is powered on.
Make sure that all voltage sources (supply and process voltage) are switched off before you are
- connecting or disconnecting any signal or terminal block
- removing or replacing a module.
The module provides several diagnosis functions Digital Input Module DI571.
The following figure shows the electrical connection of the Digital Input Module DI571:
Attention
:strong:Risk of damaging the PLC modules!
The PLC modules are destroyed by connecting a voltage > 240 V.
Make sure that all inputs are supplied from the same phase. The module must not be connected to a 400 V voltage.
The meaning of the LEDs is described in Displays Digital Input Module DI571.