1.7.4.2.1 Intended purpose
Modbus TCP communication interface module CI522-MODTCP is used as decentralized I/O
module in Modbus TCP networks. The network connection is performed via 2 RJ45 connectors
which are integrated in the terminal unit. The communication interface module contains 24 I/O
channels with the following properties:
● 8 digital configurable inputs/outputs in 1 group (1.0...1.7)
● 8 digital inputs 24 V DC in 1 group (2.0...2.7)
● 8 digital outputs 24 V DC in 1 group (3.0...3.7)
The inputs/outputs are galvanically isolated from the Ethernet network. There is no potential
separation between the channels. The configuration of the configurable digital inputs/outputs is
performed by software.
For usage in extreme ambient conditions (e.g. wider temperature and humidity range), a special
XC version of the device is available.
1.7.4.2.2 Functionality
Interface
Ethernet
Protocol
Modbus TCP
Power supply
From the process supply voltage UP
Supply of the electronic circuitry of the I/O
expansion modules attached
Through the I/O bus interface (I/O bus)
Rotary switches
for setting the last BYTE of the IP ADDRESS
(00h to FFh)
Configurable digital inputs/outputs
8 (configurable via software)
Digital inputs
8 (24 V DC; delay time configurable via soft-
ware)
Digital outputs
8 (24 V DC, 0.5 A max.)
LED displays
For system displays, signal states, errors and
power supply
External supply voltage
Via terminals ZP, UP and UP3 (process supply
voltage 24 V DC)
Required terminal unit
TU507 or TU508
ETH and TU508-ETH for Ethernet communi-
cation interface modules” on page 122
1.7.4.2.3 Connections
The Ethernet bus module CI522-MODTCP is plugged on the I/O terminal unit TU507-ETH
Chapter 1.5.1 “TU507-ETH and TU508-ETH for Ethernet communication interface modules”
Chapter 1.5.1 “TU507-ETH and TU508-ETH for Ethernet com-
munication interface modules” on page 122
. 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
Chapter 1.8.2.6 “TA526 - Wall mounting accessory” on page 902
The connection of the I/O channels is carried out using the 30 terminals of the I/O terminal unit.
I/O modules can be replaced without re-wiring the terminal units.
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.
Device specifications
Communication interface modules (S500) > Modbus
2022/01/31
3ADR010278, 3, en_US
771