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	—	Reserved
11	O0	Output signal O0
12	O1	Output signal O1
13	O2	Output signal O2
14	O3	Output signal O3
15	O4	Output signal O4
16	O5	Output signal O5
17	O6	Output signal O6
18	O7	Output signal O7
19	UP	Process voltage UP +24 VDC
20	ZP	Process voltage ZP 0 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 10 mA per DX561.

The external power supply connection is carried out via the UP (+24 VDC) and ZP (0 VDC) terminals.

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 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 figure shows the electrical connection of the inputs to the digital input/output module DX561:

Electrical connection of inputs - sink inputs

Electrical connection of inputs - source inputs

The following figure shows the electrical connection of the outputs to the module:

Attention

:strong:Risk of malfunctions in the plant!

The outputs may switch on for a period of 10 to 50 µs if the process supply voltage UP/ZP is switched on.

This must be considered in the planning of the application.

Attention

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

The outputs are not protected against short circuits and overload.

• Never short-circuit or overload the outputs.
• Never connect the outputs to other voltages.
• Use an external 3 A fast-protection fuse for the outputs.

The module provides several diagnosis functions (see chapter Diagnosis DX561 - Digital Input/Output Module).

The meaning of the LEDs is described in the Displays section DX561 - Digital Input/Output Module chapter.