Functionality
Parameter Value
LED displays For signal states, errors and supply voltages
Internal power supply Via I/O bus
External power supply Via the terminals ZP, ZP3, ZP4, UP, UP3 and UP4
(process voltage 24 VDC)
Required terminal unit
TU542
Ä
Chapter 1.4.3 “TU515, TU516, TU516-H
and TU542 for I/O Modules” on page 153
The output module is plugged on the terminal unit TU542. Properly position 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
Ä
Chapter 1.8.2.4 “TA526 - Wall Mounting
Accessory” on page 1152).
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 2.8 and 1.9 to 2.9 are electrically interconnected within the I/O terminal unit
and always have the same assignment, irrespective of the inserted module:
Terminals 1.8 to 2.8: Process voltage UP = +24 VDC
Terminals 1.9 to 2.9: Process voltage ZP = 0 V
Terminal 3.8: Process voltage UP3 = +24 VDC
Terminal 3.9: Process voltage ZP3 = 0 V
Terminal 4.8: Process voltage UP4 = +24 VDC
Terminal 4.9: Process voltage ZP4 = 0 V
Terminals Signal Description
3.0, 3.1, 3.4, 3.5 O0 to O3 4 digital outputs
4.0, 4.1, 4.4, 4.5 O4 to O7 4 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 DO526.
The external power supply connection is carried out via the UP, UP3, UP4 (+24 VDC) and the
ZP, ZP3, ZP4 (0 VDC) terminals.
I/O Modules > Digital I/O Modules
2019/04/17 3ADR010121, 13, en_US 363
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