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 terminals, cable mounting from the front or from the side). For more information, please refer to the chapter Terminal Blocks for S500-eCo I/O Modules TA563-TA565 - Terminal Blocks. 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:

Assignment of the terminals:

Terminal	Signal	Description
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 VDC

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 5 mA per DX571.

The external power supply connection is carried out via the L+ (+24 VDC) terminal. The negative pole of the external power supply is realized via the I/O bus. Therefore, the CPU/bus module and the DX571 must have a common power supply.

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

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 by a damaged cable insulation, can bridge switches accidentally.

Use sink inputs when possible or make sure that, in case of error, there will be no risks to persons or plant.

The following figures show the electrical connection of the inputs to the digital input/output module DX571:

Electrical connection of inputs - sink inputs

Electrical connection of inputs - source inputs

The following figures show the electrical connection of the outputs to the module:

Connection of 24 V DC actuators

Connection of 100-240 V AC actuators

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 - the minus connection is realized via the I/O bus

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.

For screw-type terminals only:

Warning

:strong:For screw terminals only: Danger of death by electric shock!

The IP 20 protection degree is only provided 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 section DX571 - Digital Input/Output Module.