Electrical Connection

The output module is plugged on the I/O Terminal Unit TU515 or TU516 I/O Terminal Units TU515 and TU516 for I/O Expansion 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 40 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.

The terminals 1.8 to 4.8 and 1.9 to 4.9 are electrically interconnected within the I/O Terminal Unit and have always the same assignment, independent of the inserted module:

Terminals 1.8 to 4.8: Process voltage UP = +24 V DC

Terminals 1.9 to 4.9: Process voltage ZP = 0 V

The assignment of the other terminals:

Terminals	Signal	Meaning
1.0 to 1.7	O0 to O7	8 digital outputs
2.0 to 2.7	O8 to O15	8 digital outputs
3.0 to 3.7	O16 to O23	8 digital outputs
4.0 to 4.7	O24 to O31	8 digital outputs

The internal power supply voltage for the module’s circuitry is carried out via the I/O-Bus (provided by a Bus Module or a CPU). Thus, the current consumption from 24 V DC power supply at the terminals L+/UP and M/ZP of the CPU/Bus Module increases by 2 mA per DO524.

The external power supply connection is carried out via the UP (+24 V DC) and the ZP (0 V DC) terminals.

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.

The module provides several diagnosis functions Digital Output Module DO524.

The following block diagram shows the internal construction of the digital outputs: