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. ZP and UP exist twice. So it is possible to supply external sensors (up to 8 A max.) from these terminals, for instance.
Terminal block removed |
Terminal block inserted |
L+ | +24 V DC | UP | |
| L+ | +24 V DC | UP | |||
| M | 0 V | ZP | |||
| M | 0 V | ZP | |||
| FE | FE | Functional Earth | |||
| 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) |
Bad wiring on power supply terminals
Attention
:strong:Risk of damaging the Processor Module and the Terminal \ Base!
Processor Module and Terminal Base may be damaged by voltages larger than the range allowed.
Never connect supply and process voltages > 30 V DC to the Terminal Base.
Attention
:strong:Risk of damaging the Terminal Base and the \ power supply!
Power supply and Terminal Base 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)
Attention
:strong:Risk of damaging the Terminal Base!
Clamp and Terminal Base can be damaged by too large currents.
Make sure that the current through the removable clamps never exceeds 8 A.
Serial interface COM1
The serial interface COM1 is connected to a removable 9-pole Terminal Block. It is configurable for RS-232 and RS-485 and can be used for:
- online access (RS-232 programming interface for Automation Builder)
- a free protocol
- Modbus RTU, client and server
- CS31 system bus (RS-485), as master only
Pin assignment for COM1 see power supply <no title>.
Attention
:strong:Risk of damaging the Processor Module and the Terminal \ Base!
The Processor Module and the Terminal Base may be damaged by electrostatic discharge (ESD).
Make sure that the terminal block is always connected to the Terminal Base even if you do not use COM1.
Serial interface COM2
The serial interface COM2 is connected to a 9-pole SUB-D connector. It is configurable for RS-232 and RS-485 and can be used for:
- online access (RS-232 programming interface for Automation Builder)
- a free protocol
- Modbus RTU, client and server
COM2 is not intended to establish a CS31 system bus.
| 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.
Note
TB5x3-2ETH Terminal Bases have no COM2 D-SUB connector.