Electrical Connection¶
The Ethernet Bus Module CI501-PNIO (V3) is plugged on the I/O Terminal Unit TU507-ETH ETH- Terminal Units TU507-ETH and TU508-ETH for PROFINET:sup:®- or EtherCAT® Bus Modules or TU508-ETH ETH- Terminal Units TU507-ETH and TU508-ETH for PROFINET:sup:®- or EtherCAT® Bus 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 Wall Mounting Accessory TA526).
The electrical connection of the I/O channels is carried out using the 30 terminals of the I/O Terminal Unit. I/O modules can be replaced without re-wiring the Terminal Units.
Note
Mounting, disassembling and electrical connection for the Terminal Units and the I/O modules are described in detail in S500 System Data S500 System Data, Overview.
The terminals 1.8 and 2.8 as well as 1.9, 2.9 and 3.9 are electrically interconnected within the Terminal Unit and have always the same assignment, independent of the inserted module:
Terminals 1.8 and 2.8: Process supply voltage UP = +24 V DC
Terminal 3.8: Process supply voltage UP3 = +24 V DC
Terminals 1.9, 2.9 and 3.9: Process supply voltage ZP = 0 V
Note
With a separate UP3 power supply, the digital outputs can be switched off externally. With this, an emergency-off functionality can be realised.
Note
Do not connect any voltages externally to digital outputs!
Reason: Externally voltages at an output or several outputs may cause that other outputs are supplied through that voltage instead of voltage UP3 (reverse voltage). This ist not intended usage.
Caution
:strong:Risk \ of malfunction by not intended usage!
If the function cut off of the digital outputs should be used by deactivation of the supply voltage UP3, be sure that no external voltage is conncted at the outputs DO0..DO7.
The assignment of the other terminals:
| Terminal | Signal | Meaning |
|---|---|---|
| 1.0 | AI0+ | Plus pole of analog input signal 0 |
| 1.1 | AI1+ | Plus pole of analog input signal 1 |
| 1.2 | AI2+ | Plus pole of analog input signal 2 |
| 1.3 | AI3+ | Plus pole of analog input signal 3 |
| 1.4 | AI- | Minus pole of analog input signals 0 to 3 |
| 1.5 | AO0+ | Plus pole of analog output signal 0 |
| 1.6 | AO1+ | Plus pole of analog output signal 1 |
| 1.7 | AI- | Minus pole of analog output signals 0 and 1 |
| 1.8 | UP | Process voltage UP (24 V DC) |
| 1.9 | ZP | Process voltage ZP (0 V DC) |
| 2.0 | DI0 | Signal of the digital input DI0 |
| 2.1 | DI1 | Signal of the digital input DI1 |
| 2.2 | DI2 | Signal of the digital input DI2 |
| 2.3 | DI3 | Signal of the digital input DI3 |
| 2.4 | DI4 | Signal of the digital input DI4 |
| 2.5 | DI5 | Signal of the digital input DI5 |
| 2.6 | DI6 | Signal of the digital input DI6 |
| 2.7 | DI7 | Signal of the digital input DI7 |
| 2.8 | UP | Process voltage UP (24 V DC) |
| 2.9 | ZP | Process voltage ZP (0 V DC) |
| 3.0 | DO0 | Signal of the digital output DO0 |
| 3.1 | DO1 | Signal of the digital output DO1 |
| 3.2 | DO2 | Signal of the digital output DO2 |
| 3.3 | DO3 | Signal of the digital output DO3 |
| 3.4 | DO4 | Signal of the digital output DO4 |
| 3.5 | DO5 | Signal of the digital output DO5 |
| 3.6 | DO6 | Signal of the digital output DO6 |
| 3.7 | DO7 | Signal of the digital output DO7 |
| 3.8 | UP3 | Process voltage UP3 (24 V DC) |
| 3.9 | ZP | Process voltage ZP (0 V DC) |
Caution
:strong:Risk of damaging the PLC modules!
The PLC modules must not be removed when the plant is powered on.
Make sure that all voltage sources (supply and process voltage) are switched off before you are removing or replacing a module.
Caution
: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.
Note
For the open-circuit detection (cut wire), each channel is pulled up to “plus” by a high-resistance resistor. If nothing is connected, the maximum voltage will be read in then.
Note
Analog signals are always laid in shielded cables. The cable shields are earthed at both ends of the cables. In order to avoid unacceptable potential differences between different parts of the installation, low resistance equipotential bonding conductors must be laid.
For simple applications (low electromagnetic disturbances, no high requirement on precision), the shielding can also be omitted.
The following figures show the electrical connection of the Ethernet Bus Module CI501-PNIO (V3).
Connection of the Bus Module CI501-PNIO (V3)
- Connection of the digital inputs
- Connection of the digital outputs
- Connection of resistance thermometers in 2-wire configuration to the \ analog inputs
- Connection of resistance thermometers in 3-wire configuration to the \ analog inputs
- Connection of active-type analog sensors (voltage) with electrically \ isolated power supply to the analog inputs
- Connection of active-type analog sensors (current) with electrically \ isolated power supply to the analog inputs
- Connection of active-type analog sensors (voltage) with no electrically \ isolated power supply to the analog inputs
- Connection of passive-type analog sensors (current) to the analog inputs
- Connection of active-type analog sensors (voltage) to differential \ analog inputs
- Use of analog inputs as digital inputs
- Connection of analog output loads (voltage)
- Connection of analog output loads (current)