Functionality
Parameter Value
LED displays For signal states, errors and supply voltage
Internal power supply Via the expansion bus interface (I/O bus)
External power supply Via the terminals ZP and UP (process voltage
24 VDC)
Required terminal unit
TU515 or TU516
Ä
Chapter 1.4.3 “TU515, TU516,
TU516-H and TU542 for I/O Modules” on page 153
The device is plugged on a terminal unit
Ä
Chapter 1.4.3 “TU515, TU516, TU516-H and TU542
for I/O Modules” on page 153. 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
Ä
Chapter 1.8.2.4 “TA526 - Wall Mounting Accessory”
on page 1152).
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.
Electrical Connection
For a detailed description of the mounting, disassembly and electrical connec-
tion of the module, please refer to the System Assembly, Construction and Con-
nection chapter
Ä
Chapter 2.6 “AC500 (Standard)” on page 1248.
The electrical connection of the I/O channels is carried out using the 40 terminals of the I/O ter-
minal 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 VDC
Terminals 1.9 to 4.9: process voltage ZP = 0 VDC
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 (pro-
vided by a bus module or a CPU). Thus, the current consumption from 24 VDC 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 VDC) and the ZP (0 VDC)
terminals.
I/O Modules > Digital I/O Modules
2019/04/173ADR010121, 13, en_US354
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