Functionality
Parameter
Value
LED displays
For signal states, errors and supply voltage
Internal power supply
Via the I/O bus interface (I/O bus)
External power supply
Via the terminals ZP and UP (process voltage
24 V DC)
Required terminal unit
TU541 and TU542 for I/O modules” on page 126
The device is plugged on a terminal unit
Chapter 1.5.2 “TU515, TU516, TU541 and TU542
. Position the module properly and press until it locks in place. The
terminal unit is either mounted on a DIN rail or to the wall using 2 screws plus the additional
accessory for wall mounting (TA526
Chapter 1.8.2.6 “TA526 - Wall mounting accessory”
Multiple overloads
No effects of multiple overloads on isolated multi-channel modules occur, as
every channel is protected individually by an internal smart high-side switch.
Connections
For a detailed description of the mounting, disassembly and connection of the
module, please refer to the System Assembly, Construction and Connection
Chapter 2.6 “AC500 (Standard)” on page 971.
The 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.
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 DC
The assignment of the other terminals:
Terminals
Signal
Description
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 communication interface 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/communication interface
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.
Device specifications
I/O modules > Digital I/O modules
2022/01/31
3ADR010278, 3, en_US
312