Electrical Connection¶
The PROFINET Bus Module CI504-PNIO is plugged on the Terminal Unit TU520-ETH TU520-ETH for PROFINET Communication Interface Modules. Properly seat the module and press until it locks in place. The Terminal Unit is mounted on a DIN rail or with 2 screws plus the additional accessory for wall mounting (TA526 TA526 - Wall Mounting Accessory).
The electrical connection of the power supply voltage is carried out using the 6 terminals and the 3 removable connectors of the Terminal Unit. The CI504-PNIO can be replaced without re-wiring the Terminal Units.
Note
For a detailed description of the mounting, disassembly and electrical connection of the module, please refer to the System Assembly, Construction and Connection chapter AC500 (Standard).
The terminals 1.0, 2.0 and 3.0 as well as 1.1, 2.1 and 3.1 are electrically interconnected within the Terminal Unit and have always the same assignment, independent of the inserted module:
| Terminal | Signal | Description |
|---|---|---|
| 1.0 | UP | Process voltage UP (+24 VDC) |
| 1.1 | ZP | Process voltage ZP (0 VDC) |
| 2.0 | UP | Process voltage UP (+24 VDC) |
| 2.1 | ZP | Process voltage ZP (0 VDC) |
| 3.0 | UP | Process voltage UP (+24 VDC) |
| 3.1 | ZP | Process voltage ZP (0 VDC) |
| Terminal | Signal | Description | |
|---|---|---|---|
| 1 | Term-P | RS-485 | Internal line terminating resistor for non-inverted signal (Rx/Tx-P) |
| RS-422 | Non-inverted receive signal terminal (RxD+) | ||
| 2 | Rx/Tx-P | RS-485 | Non-inverted I/O signal terminal for each channel |
| RS-422 | Non-inverted transmit signal terminal (TxD+) | ||
| 3 | Rx/Tx-N | RS-485 | Inverted I/O signal terminal for each channel |
| RS-422 | Inverted transmit signal terminal (TxD-) | ||
| 4 | Term-N | RS-485 | Internal line-terminating-resistor for inverted signal (Rx/Tx-N) terminal |
| RS-422 | Inverted receive signal terminal (RxD-) | ||
| 5 | RTS | RS-232 | Request To Send signal terminal for each channel |
| 6 | TxD | RS-232 | Transmit signal terminal for each channel |
| 7 | SGND | RS-232 | Signal ground for each channel |
| 8 | RxD | RS-232 | Receive signal terminal for each channel |
| 9 | CTS | RS-232 | Clear To Send signal terminal for each channel |
Note
The connection of SGND (ground) is optional for RS-485/RS-422.
Note
For RS-422, no external line-terminating resistors have to connected. They are already connected inside the module.
Warning
:strong:Removal/Insertion under power
The devices are not designed for removal or insertion under power. Because of unforeseeable consequences, it is not allowed to plug or unplug devices with the power being ON.
Make sure that all voltage sources (supply and process voltage) are switched off before you
- connect or disconnect any signal or terminal block
- remove, mount or replace a module.
Disconnecting any powered devices while energized in a hazardous location could result in an electric arc, which could create a flammable ignition resulting in fire or explosion.
Make sure that power is removed and that the area has been thoroughly checked to ensure that flammable materials are not present prior to proceeding.
The devices must not be opened when in operation. The same applies to the network interfaces.
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.
The module provide several diagnosis functions CI504-PNIO.
Further information is provided in the System Technology chapter PROFINET: PROFINET Communication Modules