Connections¶
I/O Bus
The I/O bus is the I/O data bus for the I/O expansion modules. Through this bus, I/O and diagnosis data are transferred between the processor module and the I/O expansion modules. Up to 10 I/O expansion modules can be added (see description for I/O bus in the system assembly chapter System Assembly, Construction and Connection).
Power Supply
Depending on the variant, the processor modules can be connected to the following supply voltages:
| 24 VDC | 100 - 240 VAC |
The electrical connection is established via a removable 5-pin terminal block. As the terminal block is also available as a spare part (inside TA570 Spare Part Set for AC500-eCo processor modules), further information on the terminal block for power supply and the terminal block for serial RS-485 adaptor is provided under TA570 - Spare Part Set.
The 24 VDC variant contains 2 L+ and M terminals. The L+ terminal on the left side is the input and the right side is the output. The M terminals are internally interconnected. The supply can be easily looped through to the onboard digital inputs.
Caution
:strong:Risk of damaging the processor module and the connected \ modules!
Voltages > 35 VDC (DC variants only) or > 288 VAC (AC variants only) might damage the processor module and the connected modules.
Make sure that the supply voltage never exceeds 35 VDC / 288 VAC.
Caution
:strong:Risk of damaging the processor module!
Excess currents at 24 VDC output (24 VDC processor module variant) will damage the processor module.
Use an appropriate fuse PM55x-xP and PM56x-xPwithin 24 VDC input connection.
The 100-240 VAC variant contains an internal power supply with a wide-range input. It provides a 24 VDC output at the terminals L+ and M which can be used to supply the onboard digital inputs.
Note
The voltage output at 100-240 VAC variants can provide 180 mA max. The output is protected against overload by a self-resetting fuse (PTC).
Note
According to IEC 60204-1:2016, where control circuits are supplied from an AC source, transformers having separate windings shall be used to separate the power supply from the control supply.
Serial interface COM1
The serial non-isolated COM1 interface provides communication via RS-485 and is carried out as a 9-pin D-sub jack. The COM1 interface can be used
- for online connection with Automation_Builder software (via a RS-485 programming cable. e. g. TK503 TK503 - Programming Cable)
- as MODBUS RTU (master and slave)
- for ASCII serial protocols
- as CS31 system bus (master only).
Note
COM1 does not support communication via RS-232. The programming cable TK501 cannot be used.
Serial interface COM1
| Serial Interface | Pin | Signal | Description |
|---|---|---|---|
Serial Interface |
1 | FE | Functional earth |
| 2 | SGND | 0 V power supply, internally connected to M terminal | |
| 3 | RxD/TxD-P | Receive/Transmit positive | |
| 4 | Reserved | Reserved, not connected | |
| 5 | SGND | 0 V power supply, internally connected to M terminal | |
| 6 | +3.3 V | 3.3 V power supply | |
| 7 | Reserved | Reserved, not connected | |
| 8 | RxD/TxD-N | Receive/Transmit negative | |
| 9 | Reserved | Reserved, not connected | |
| Shield | Cable shield | Functional earth |
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.
Attention
The internal power supply voltage, which is connected to pin 6 of the D-sub connector, must not be short-circuited or connected to any other voltages.
Additional information for wiring the COM1 interface can be found in TA562-RS Serial RS-485 Adaptor Serial Interface COM1 and TA562-RS-RTC Real-time Clock and Serial RS-485 Adaptor CS31 bus.
Serial interface COM2 (optional)
The optional serial COM2 interface provides communication via RS-485 and is carried out as a removable 5-pin terminal with screw connection. The COM2 interface can be used
- for online connection with Automation_Builder software (via a RS-485 programming cable. e. g. TK504 TK504 - Programming Cable
- as MODBUS RTU (master and slave)
- for ASCII serial protocols
Note
The serial RS-485 interface is not electrically isolated.
Note
Communication via CS31 bus is not possible.
Additional information for installing the accessory modules can be found in TA562-RS Serial RS-485 Adaptor TA562-RS - Serial RS-485 Adaptor and TA562-RS-RTC Real-time Clock and Serial RS-485 Adaptor TA562-RS-RTC - Adapter with Serial RS-485 (COM2) and Real-time Clock.
Additional information for wiring the COM2 interface can be found in Serial Interface COM2 (PM55x, PM56x) Serial Interface COM2.
| Serial Interface | Pin | Description |
|---|---|---|
| 1 | Terminator P | |
| 2 | TxD/RxD-P | |
| 3 | TxD/RxD-N | |
| 4 | Terminator N | |
| 5 | Functional earth |
ETHERNET interface
The ETHERNET interface is carried out via a RJ45 jack. The pin assignment of the ETHERNET interface:
| Interface | Pin | Description | |
|---|---|---|---|
| 1 | Tx+ | Transmit Data + | |
| 2 | Tx- | Transmit Data - | |
| 3 | Rx+ | Receive Data + | |
| 4 | NC | Not connected | |
| 5 | NC | Not connected | |
| 6 | Rx- | Receive Data - | |
| 7 | NC | Not connected | |
| 8 | NC | Not connected | |
| Shield | Cable shield | Functional earth | |
The supported protocols and used ETHERNET ports can be found in a separate chapter: Supported Ethernet Protocols and Ports
Communication via MODBUS TCP/IP is described in detail in a separate chapter: Communication \ with MODBUS RTU
Electrical Connection
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.
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.