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).

Power Supply

The supply voltage of 24 V DC is connected to a 5-pole removable terminal block. L+/M exist twice. So it is possible to supply external sensors (up to 8 A max.) from these terminals, for instance.

Power supply via a 5-pole Terminal Block

Terminal block removed	Terminal block inserted	L+	+24 V DC	Plus pole of the power supply voltage
		L+	+24 V DC	Plus pole of the power supply voltage
		M	0 V	Minus pole of the power supply voltage
		M	0 V	Minus pole of the power supply voltage
		FE	FE	Functional Earth

Bad Wiring on Power Supply Terminals

Caution

:strong:Risk of damaging the Processor Module!

The Processor Module may be damaged by voltages larger than the range allowed.

Never connect supply and process voltages > 30 V DC.

Caution

:strong:Risk of damaging the power supply!

Power supply can be damaged by short circuits.

Make sure that the clamps L+ and M which exist twice are not connected in a wrong way (e. g. ± of power supply is connected to both L+/L+ or both M/M)

Caution

:strong:Risk of damaging the processor module or the removable Terminal Block!

Removable Terminal Block can be damaged by too large currents.

Make sure that the current through the removable clamps never exceeds 8 A.

Serial Interface COM1

For terminal assignment see the figure below

Terminal assignment of the serial interface COM1

Terminal block removed	Terminal block inserted	1	Terminator P	RS-485	Terminator P
		2	RxD/TxD-P	RS-485	Receive/Transmit, positive
		3	RxD/TxD-N	RS-485	Receive/Transmit, negative
		4	Terminator N	RS-485	Terminator N
		5	RTS	RS-232	Request to send (output)
		6	TxD	RS-232	Transmit data (output)
		7	SGND	Signal Ground
		8	RxD	RS-232	Receive data (input)
		9	CTS	RS-232	Clear to send (input)

The serial interface COM1 is connected to a removable 9-pole Terminal Block. It is configurable for RS-232 and RS-485.

Caution

:strong:Risk of damaging the Processor Module!

The Processor Module may be damaged by electrostatic discharge (ESD). Make sure that the 9-pole Terminal Block is always connected to the Processor Module even if you do not use COM1.

A detailed description for COM1 can be found under Serial interface COM1 Serial interface COM1 of the Terminal Bases (PM57x, PM58x, PM59x).

Serial Interface COM2

Pin assignment

Serial Interface	Pin
	1	FE	Functional earth
	2	TxD	RS-232	Transmit data	Output
	3	RxD/TxD-P	RS-485	Receive/Transmit	Positive
	4	RTS	RS-232	Request to send	Output
	5	SGND	Signal ground	0 V supply out
	6	+5 V		5 V supply out
	7	RxD	RS-232	Receive data	Input
	8	RxD/TxD-N	RS-485	Receive/Transmit	Negative
	9	CTS	RS-232	Clear to send	Input
	Shield	FE	Functional earth

Attention

:strong:Risk of corrosion!

Unused connectors and slots may corrode, if using XC devices in salt mist environments.

Protect unused connectors and slots with TA535 protective caps for XC devices TA535: Protective Caps TA535 for XC Devices Protective Caps TA535 for XC Devices.

The serial interface COM2 is connected to a 9-pole SUB-D connector. It is configurable for RS-232 and RS-485.

COM2 cannot be used for communication via CS31 System Bus. A detailed description for COM2 can be found under Serial interface COM2. Serial Interface COM2 of the Terminal Bases (PM57x, PM58x and PM59x)

Network Interfaces Ethernet (ETHx)

Pin assignment RJ45 jack:

or	1	TxD+	Transmit Data +
	2	TxD-	Transmit Data -
	3	RxD+	Receive Data +
	4	NC	Not connected
	5	NC	Not connected
	6	RxD-	Receive Data -
	7	NC	Not connected
	8	NC	Not connected
	Shield	Cable shield	Functional earth

See supported protocols and used Ethernet ports Supported Ethernet Protocols and PortsEthernet Protocols and Ports: Supported Ethernet Protocols and Ports

See Communication via Modbus TCP/IP Communication \ with Modbus® RTU and Modbus® TCP/IPModbus RTU and Modbus TCP/IP: Communication \ with MODBUS RTU

MAC Addresses

The MAC addresses of the network interfaces of the PM595-4ETH are printed on the label in the following way: xxxxxxMAC ETH1/MAC ETH2/MAC ETH3/MAC ETH4.

The figure below shows the assignment of the MAC addresses to the corresponding interface.

Assignment of the MAC addresses to the corresponding interface