1.7.6.4.1 Intended Purpose
The PROFINET I/O bus module CI504-PNIO provides 3 onboard serial interfaces. The network
connection is performed via 2 RJ45 connectors which are integrated in the terminal unit.
The bus interfaces are electrically isolated from the Ethernet network.
For usage in extreme ambient conditions (e. g. wider temperature and humidity range), a spe-
cial XC version of the device is available.
1.7.6.4.2 Functionality
Parameter Value
Interface Ethernet
Protocol PROFINET IO RT
Serial Interfaces 3 Serial UART interfaces
RS-232, RS-422 and RS-485 available as
physical layer
Serial protocol ASCII
I/O bus interface For up to 10 AC500 I/O Modules
Rotary switches For setting the IO Device identifier for configu-
ration purposes (00h to FFh)
LED displays For system displays, field bus indication, errors
and power supply
Power supply Via terminals UP and ZP (process supply
voltage 24 VDC)
Effect of incorrect input terminal connection Wrong or no signal detected, no damage up to
35 V
Required terminal unit
TU520
Ä
Chapter 1.4.5 “TU520-ETH for PRO-
FINET Communication Interface Modules”
on page 161
1.7.6.4.3 Electrical Connection
The PROFINET Bus Module CI504-PNIO is plugged on the terminal unit TU520-ETH
Ä
Chapter 1.4.5 “TU520-ETH for PROFINET Communication Interface Modules” on page 161.
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
Ä
Chapter 1.8.2.4
“TA526 - Wall Mounting Accessory” on page 1152).
The electrical connection of the power supply voltage is carried out using the 6 terminals and
the 3 removable connectors of the terminal unit. The CI504-PNIO can be replaced without re-
wiring the terminal units.
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 terminals 1.0, 2.0 and 3.0 as well as 1.1, 2.1 and 3.1 are electrically interconnected within
the terminal unit and have always the same assignment, independent of the inserted module:
Communication Interface Modules (S500) > PROFINET
2019/04/17 3ADR010121, 13, en_US 1071
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