Connections

Serial 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 Terminal Units (for 1 I/O expansion module each) can be added (see description for I/O-Bus in the System Assembly chapter System Assembly, Construction and Connection).

Serial interface COM1

The serial non-isolated COM1 interfaces provides communication via RS-485 and is carried out as a 9-pin Sub-D jack. The COM1 interface can be used

  • for online connection with the PS501 Control 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

Pin assignment:

Serial Interface

../_images/087d1a046426a5750a33139001f613591 		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    

Caution

:strong:Risk of damaging the PLC modules!

The processor module can be damaged by overvoltages and short circuits.

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.

Note

The Serial RS485 Interface is not electrically isolated.

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 System Bus.

Serial interface COM2 (optional)

The optional serial COM2 interfaces provides communication via RS-485 and is carried out as a 5-pin removable terminal with screw connection. The COM2 interface can be used

  • for online connection with the PS501 Control 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.

Pin assignment:

Serial Interface

../_images/2251553fe387d9d20a331390015ea5a71 		1 Terminator P
2 TxD/RxD-P
3 TxD/RxD-N
4 Terminator N
5 Functional earth

Ethernet interface (depending on model)

The Ethernet interface is carried out via a RJ45 jack. The pin assignment of the Ethernet interface:

../_images/b7de849fe387e1510a33139000eba54e1 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 Supported Ethernet Protocols and Ports.

Communication via Modbus TCP/IP is described in detail in a separate chapter: Communication \ with MODBUS RTU Communication \ with Modbus® RTU and Modbus® TCP/IP.

Electrical Connection

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.

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.