Electrical Connection¶
The output module DO571 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 DO572 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, Overview.
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 chapter 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 outputs:
The assignment of the terminals:
| Terminal | Signal | Meaning |
|---|---|---|
| 10 | NO0 | Normally-open contact of the output NO0 |
| 11 | NO1 | Normally-open contact of the output NO1 |
| 12 | NO2 | Normally-open contact of the output NO2 |
| 13 | NO3 | Normally-open contact of the output NO3 |
| 14 | R0..3 | Output common for signals NO0 to NO3 |
| 15 | NO4 | Normally-open contact of the output NO4 |
| 16 | NO5 | Normally-open contact of the output NO5 |
| 17 | NO6 | Normally-open contact of the output NO6 |
| 18 | NO7 | Normally-open contact of the output NO7 |
| 19 | R4..7 | Output common for signals NO4 to NO7 |
| 20 | L+ | Process voltage L+ +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 DO571.
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 DO571 must have a common power supply.
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.
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.
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 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.
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 (see Diagnosis Digital Output Module DO571).
The following figure shows the electrical connection of the Digital Output Module DO571:
Connection of 24 V DC actuators to the DO571
Connection of 100-240 V AC actuators to the DO571
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.
Power supply of the DO571 - the minus connection is realized via the I/O-Bus
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.
The meaning of the LEDs is described in the Displays Digital Output Module DO571.