Electrical Connection

The Digital Input/Output Module DX571 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 DX572 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 the S500 System Data S500 System Data, Overviewchapters.

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 the Terminal Blocks for S500-eCo I/O Modules TA563-TA565 Terminal Blocks for AC500-eCo I/O Modules and AC500-eCo \ CPUs. 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 and outputs:

The assignment of the terminals:

Terminal	Signal	Meaning
1	C0..7	Input common for signals I0 to I7
2	I0	Input signal I0
3	I1	Input signal I1
4	I2	Input signal I2
5	I3	Input signal I3
6	I4	Input signal I4
7	I5	Input signal I5
8	I6	Input signal I6
9	I7	Input signal I7
10	NO0	Normally-open contact of the output 0
11	NO1	Normally-open contact of the output 1
12	NO2	Normally-open contact of the output 2
13	NO3	Normally-open contact of the output 3
14	R0..3	Output common for signals O0 to O3
15	NO4	Normally-open contact of the output 4
16	NO5	Normally-open contact of the output 5
17	NO6	Normally-open contact of the output 6
18	NO7	Normally-open contact of the output 7
19	R4..7	Output common for signals O4 to O7
20	L+	Process voltage +24 V DC

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 5 mA per DX571.

The external power supply connection is carried out via the L+ (+24 V DC) terminal. The minus pole of the external power supply is realized via the I/O-Bus. Therefor, the CPU/Bus Module and the DX571 must have a common power supply.

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.

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.

The module provides several diagnosis functions (see Diagnosis Digital Input/Output Module DX571).

The digital inputs can be used as source inputs or as sink inputs.

Attention

:strong:Risk of malfunctions in the plant!

A ground closure, e. g. caused through a damaged cable isolation, can bridge switches accidentally.

Use sink inputs when possible or make sure that in error case no risks will happen to persons or the plant.

The following figures show the electrical connection of the inputs to the Digital Input/Output Module DX571:

Electrical connection of inputs to the DX571 - sink inputs

Electrical connection of inputs to the DX571 - source inputs

The following figures show the electrical connection of the outputs to the Digital Input/Output Module DX571:

Connection of 24 V DC actuators to the DX571

Connection of 100-240 V AC actuators to the DX571

Note

The L+ connection of the DO571 and the 24 V supply of the CPU/Bus Module must be connected to the same 24 V power supply.

Power supply of the DX571 - the minus connection is realized via the I/O-Bus

Attention

: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.

For screw-type terminals only:

Warning

:strong:Danger of life through electric shock!

The IP 20 protection degree is provided only if all terminal screws are tightened.

Tighten all screws of unused load terminals of relay outputs if voltages > 24 V are connected to the relay group.

Attention

:strong:Risk of damaging the I/O Module!

The outputs are not protected against short circuit and overload.

• Never short circuit or overload the outputs.
• Never connect inductive loads without an external suppression against voltage peaks due to inductive kickback.
• Never connect voltages > 240 V. All outputs must be supplied from the same phase.
• Use an external 5 A fast protection fuse for the outputs.

The meaning of the LEDs is described in the Displays Digital Input/Output Module DX571.